小型过热蒸汽式炭化炉

目前,中国经济持续腾飞的同时,形形色色的环境负荷也在不断地增长,生态环境在持续恶化。因此,如何正确而恰当地解决这些环境问题已成为国家和人民共同面对的巨大课题。     

传染性隔离病房回风效率试验研究

针对目前国内外在传染性隔离病房通风空调系统形式方面存在的一些主要问题,采用微生物气溶胶以及微生物学方法对隔离病房内回风效率进行了试验研究,得到了一些初步结论,进而对全新风系统和循环风系统的应用范围给予了诠释。     

粒子计数器采样气溶胶的误差

用粒子计数器在洁净室中采样 ,采样误差可包括非等速采样的误差、采样管中微粒沉积的误差、粒子计数器的计数和采样流量误差 ,分别约为 - 5 %、- 3%、- 3 5 %和±3% ,结果引起计数器采样的综合误差约为 7 2 %。     

烧结机尾大烟罩除尘系统防结露问题

分析了烧结机尾除尘系统中，除尘器滤料腐蚀的原因，确定了露点温度，论述了除尘系统防止结露的技术措施，即控制烟气的温度高于露点温度，选择了既经济又适合现场条件的方法：保温法＋混入热风直接加热法。     

切顶卸压无充填沿空留巷技术在神火集团的研究与实施

针对柔模混凝土、高水充填沿空留巷存在支护材料成本较高、人员占用多及后期修巷工程量较大等问题,根据何满潮院士的"110工法",依托聚能水压光面爆破技术,结合采空区上覆岩层垮落规律和采空区的压力显现规律,在实验室进行了"巷道底板岩层应力分布区域"技术研究;掌握了巷道原岩应力区、应力集中区、卸压区、应力恢复区4个区域的分布地点和受力状况;总结出切顶卸压无充填沿空留巷技术的技术原理,并制定了无充填留巷技术的支护方案。利用切顶卸压无充填沿空留巷技术,留巷断面、支护强度符合相关要求,生产成本大大降低,经济社会效益较为显著。     

Experimental study on compaction-induced anisotropic mechanical property of rockfill material

The anisotropy of rockfill materials has a significant influence on the performance of engineering structures. However, relevant research data are very limited, because of the difficulty with preparing specimens with different inclination angles using traditional methods. Furthermore, the anisotropy test of rockfill materials is complex and complicated, especially for triaxial tests, in which the major principal stress plane intersects with the compaction plane at different angles. In this study, the geometric characteristics of a typical particle fraction consisting of a specific rockfill material were statistically investigated, and the distribution characteristics of particle orientation in specimens prepared via different compaction methods were examined. For high-density rockfill materials, a set of specimen preparation devices for inclined compaction planes was developed, and a series of conventional triaxial compression tests with different principal stress direction angles were conducted. The results reveal that the principal stress direction angle has a significant effect on the modulus, shear strength, and dilatancy of the compacted rockfill materials. Analysis of the relationship between the principal stress direction angles, change in the stress state, and change in the corresponding dominant shear plane shows that the angle between the compacted surface and dominant shear plane is closely related to interlocking resistance associated with the particle orientation. In addition, different principal stress direction angles can change the extent of the particle interlocking effect, causing the specimen to exhibit different degrees of anisotropy.     

中国城市化若干理论问题刍议

本文简要讨论了中国城市化的五个理论问题,认为城市化的本质是空间集聚;城市化的目标是提高人居环境的质量;城市化水平的度量应由“人口数量型指标”转变为“功能质量型指标体系”;城市经济专业化与城市等级高低并非呈同向变化;要正确认识城市化与工业化之间的关系。     

洁净空间新型气流分布末端--阻漏层的理论

净化系统把高效过滤器放在末端的做法,既有好处也有坏处,一旦末端发生漏泄,则其后再无保障体系,将产生无可挽回的后果,特别是地于单向流的高级别的洁净室。本课题提出的阻漏概念就是通过在末业高效的阻漏层,可以把原来集过滤、气流分布和堵漏密封要求于一身的高效末端风口移到静压箱外的一定位置上去并大大减少其数量,使其只管过滤作用,而气流作用由阻层承担,并且把末端的密封要求大大简化。本文推导出的漏泄方程表明,一个