煤磨气箱脉冲收尘器改造成高效行喷袋除尘器的实践

具有成品收集功能的煤粉收尘器,不仅要适应高含尘浓度,还要实现低排放、低阻力运行,且具有防爆功能。宜兴天山5 000 t/d水泥熟料生产线煤磨系统气箱脉冲收尘器存在运行阻力高、收尘器壳体变形漏风等问题,在分析运行情况及结构特点的基础上,引入行喷清灰技术,加强防爆措施和内部通风,优化内部结构,原有问题得到彻底解决。

高效喷洒水玻璃溶液对再生粗骨料性能的影响

为提高处理再生粗骨料的效率,节约处理时间与材料,提出循环喷洒水玻璃溶液的处理方式。结果显示,经过3个喷洒循环(约1min),再生粗骨料对水玻璃溶液的吸收基本达到平衡,吸收率约3.4%。喷洒处理后,再生粗骨料的压碎值、表观密度均有所提高,吸水率下降。与浸泡方法相比,喷洒方法的处理效果基本相当,但能节约大量的时间与材料。

模拟转炉底吹氧气和石灰粉的冷态及热态试验

为了研究转炉底吹氧气和石灰粉的冶炼工艺,进行了冷态和热态模拟试验。冷态模拟试验通过改变气源压力的方法,基本实现了对石灰粉流量的控制。喷粉罐的中路气流和下路气流发挥了主要作用。在内径6 mm的输粉管和喷粉枪内径5 mm的条件下实现了5 min之内喷吹石灰粉6~9 kg的目标。平均粉气比为11.2~23.3 kg/m^(3),输粉气平均流速达到34.4~113.0m/s。热模拟试验发现仅靠底吹石灰粉及11.44%~27.22%氧量,就可以实现15.8%~50%的脱磷率。通过减少底吹枪环缝宽度及增大冷却气甲烷流量等措施,可以减少炉底的侵蚀和底吹枪的烧损,但目前还不能满足工业生产需要,还需进一步改进。

Role of Wind Power in Energy Development in China

In recent years,China has made significant achievements in optimizing its energy structure and tapping into renewable energy.Wind power,in particular,has been doubled in its development year by year between 2005-2009.However,wind power develops too fast,which is not harmonious with the power system,the industry structure and the policy mechanism.Therefore,it is necessary to find the fundamental causes for the issue.Based on the inherent features and practical issues of wind power development in China,the role of wind power in energy development is put forward through probing logically into three perspectives,i.e.energy utilization,energy development and the ultimate objectives of wind power development.The current wind power development should be grounded on the improvement of wind power industrialization system,the smart grid and the research on new energy storage technology so as to lay firm foundations for large-scale development of wind power in the future.