Experimental study on performance of flow & desulfurisation of a gas-liquid screen scrubber for wet flue gas desulfurization

In the paper, the gas-liquid two-phase flow performance and desulfurisation performance of the gas-liquid screen scrubber were experimentally studied when limestone was used as absorbent. Experiments were carried out at varying the flue gas velocity and slurry flux in concurrent and countercurrent tower respectively. The experimental results showed that the flow resistance of absorber increased rapidly with an increase of the flue gas velocity whether in concurrent or in countercurrent tower, and the up trend of the flow resistance in the countercurrent tower was higher than those in the concurrent one. The influence of the flue gas velocity on the flow resistance of absorber was more than those of the slurry flux density. Whether in the concurrent tower or in the countercurrent one, increasing the flue gas velocity or the slurry flux density would enhance the desulphurization efficiency. The influence of the slurry flux density on the desulfurisation efficiency was greater than those of the flue gas velocity.

液幕式烟气脱硫塔气液两相流动特性研究

针对液幕塔这一新型湿法烟气脱硫装置,从喷嘴的射流特点出发,对回落液幕分布规律、液滴的粒径分布和液幕塔内气液流动特点进行了分析,结合试验结果理论分析了顺流/逆流吸收塔内液幕床层高度并分别对烟气速度、液气比对床层压降的影响进行了试验研究。得到了液幕床层高度计算公式和床层阻力系数计算的关联式,为液幕塔的设计和优化提供了基础性试验数据。

Ramu红土镍矿矿浆的生产实践

介绍了Ramu红土镍矿的矿山工程,概述了红土镍矿矿浆的生产情况。实践中采用VOLVO A40E型运矿车自动卸矿+挖掘机加矿的原矿仓给料作业方式,结构化焊接制备和模块化更换的方法改造顶条格筛,控制上游来料中砾石和稀料的下料量,实现原矿仓的有效给料和下料;采用铁板给料机给下游稳定有效地输送矿石;改进圆筒洗矿机的筛条和衬板,提高有效运转率;改进槽式擦洗机,提升返砂能力和擦洗效果;采用直线振动筛筛分矿浆,使制备的初级矿浆产品粒度达到-3 mm;采用增大摩擦力,及对磨损的头轮进行更换的措施,缓解1号皮带式输送机雨天打滑的问题,解决了矿浆生产环节的瓶颈问题,实现供给湿法冶炼工艺的矿浆产能达产。通过Ramu矿山水力采矿造浆的规模化生产实践,实现供给湿法冶炼工艺的矿浆产能超产,Ramu矿山水力采矿单日生产的矿浆量能占到矿浆生产总量的三分之一以上,运行成本较低,特别是能够弥补Ramu地区常规的机采在雨季作业效能降低、产能下降问题,在Ramu矿山矿浆生产方面有广阔的应用前景。Ramu矿山2019年原矿处理预计达到700万t,生产矿浆1 600万m3,折算输送冶炼厂的金属镍量达到41 500 t,达到设计产能的110%,实现湿法冶炼提取有价金属镍钴所需矿浆的按需供给。

U型塔脱硫除尘一体化技术在电厂中的应用

以贵州省习水县二朗电厂为例,介绍了二郎电厂2×660 MW新建机组烟气污染物控制系统概况,阐述了U型塔脱硫除尘一体化技术原理及特点。经实际运行验证,U型塔脱硫除尘一体化技术可实现高硫煤机组98%以上的脱硫率要求,同时该技术结合湿式电除尘器一体化布置,可为我国高硫煤地区电厂SO_2和粉尘的深度净化提供了可行的技术方案。

2×600kt/a磷酸二铵装置生产工艺和设备的优化

为提升氨化造粒性能,改善磷酸铵产品的质量,增强磷酸铵对农作物的增产效果,进一步加强瓮福磷酸铵在市场上的竞争力,瓮福化工公司采用双管式反应器工艺生产磷酸铵产品,并对其工艺不断改进。同时通过添加管式洗涤器、筛分机、粒度和色度分析来进一步提升磷酸铵产品质量和减少对环境的影响。