鼓泡烟气脱硫技术水平衡计算

鼓泡烟气脱硫技术虽然较喷淋技术有电耗低,不容易结垢,效率高的优点,但是鼓泡技术耗水量却较喷淋法大。针对鼓泡技术耗水大的问题,结合项目运行实际情况和经验,详细计算鼓泡技术系统内水平衡并提出系统水合理循环利用的方案。     

喷淋塔、鼓泡塔烟气脱硫技术的比较

在介绍喷射鼓泡塔烟气脱硫（flue gas desulfurization,FGD）及带托盘的喷淋塔烟气脱硫工艺的基础上,详细对比和分析了两种不同塔型烟气脱硫技术的钙硫比、脱硫效率、水耗及电耗,得出结论：鼓泡塔的烟气脱硫率较高,可控性较强,但是工艺复杂,系统阻力比较大,烟气含尘量大的电厂不适用;带托盘的喷淋塔烟气脱硫率稍低,但能满足环保要求,工艺简单,便于检修,适用性较强。提出以下建议：电厂设计时,应根据现＼场不同情况和具体的要求,选择不同的烟气脱硫技术。     

电石渣用于烟气脱硫实验研究及工业应用

针对城区集中供热锅炉和窑炉的特点,提出了以电石渣为脱硫剂的高低液位喷射鼓泡管脱硫装置,并进行了电石渣浆液pH值对脱硫效率的影响实验,确定了冲击管下端面与液面的距离对烟气流动阻力的影响.在此基础上,进行了12 000 m3/h烟气量的工业应用.运行结果表明:采用高低液位喷射鼓泡管脱硫装置以电石渣为脱硫剂进行烟气脱硫,可保证脱硫率,降低脱硫除尘成本,并可实现脱硫产物随灰渣一同处理.     

鼓泡塔脱硫工艺研究

文章介绍了鼓泡塔脱硫技术及其性能的优缺点,针对JBR反应器,着重介绍了该工艺系统的吸收反应机理、氧化反应机理、石膏结晶反应机理及除尘机理,从电势位的角度提出一个氧化反应机理的全新观念.     

鼓泡塔烟气脱硫技术在600 MW机组中的应用

介绍了鼓泡塔湿法脱硫的基本原理以及工艺过程，其工艺核心为鼓泡式反应器。由于脱硫效率和pH值的控制密切相关，所以分析了pH值控制回路并指出了在调试中发现的问题，如石灰石流量总存在一定波动和不能大幅度改变pH的设定值等。章介绍了首套装置投入商业运行的情况。实践表明，该装置的脱硫效率较高，可达95％以上，且工艺简单，因此可在600MW电厂烟气脱硫项目中推广使用。     

鼓泡塔内降低净烟气中小液滴浓度的试验研究

通过鼓泡塔试验台研究了净烟气中小液滴的形成规律,并确定了网栅的最佳安装位置.在600 MW机组现场,采用打靶法对鼓泡塔内安装网栅前后不同工况下烟气携带小液滴的浓度进行了测量.结果表明:当鼓泡塔液位为125 mm时,网栅的最佳安装位置是距喷射孔50 mm处;随着塔内运行液位的增加,小液滴浓度明显降低;与改造前相比,改造后的小液滴量急剧减少.在塔内鼓泡反应器中安装网栅能有效降低小液滴浓度,使气-气换热器堵塞速率大大降低,脱硫系统能够在较长周期内运行.     

Modelling and gas–solid mixing characterization in the jiggled bed reactor (JBR)

The jiggled bed reactor (JBR) is a new multiphase laboratory-scale microreactor consisting of a sealed container attached to a piston that is rapidly moved up and down by a pneumatically powered actuator. Particles and fluids in the container are mixed by this up and down motion instead of mechanical agitators or a fluidizing gas. This alternating motion provides intense mixing of all phases (gas, liquid, or solid) and intense contact between phases. Small rods inside the solids bed are heated by induction, allowing for excellent control of bed temperature and heating rate. The JBR is inexpensive and easy to operate, and it has been applied to catalytic gasification of bio-oil, biomass pyrolysis, activated carbon production, high-pressure oil hydrogenation, and hydrocarbons adsorption. Experiments demonstrated that solids mixing depends on the reactor platform maximum accelerations during both up and down strokes. A minimum acceleration, 55 m²/s for the tested JBR, was required to achieve good solids mixing. A physical model was developed to predict the reactor platform motion and its maximum acceleration. It requires a few preliminary experiments (around 10) to obtain its four empirical parameters. The model can then determine how to adjust the actuator compressed air pressure or modify the equipment to eliminate performance bottlenecks.