选煤厂封闭式煤炭输送通道实时安全监控系统

为了保障选煤厂安全、高效生产,结合选煤厂封闭式煤炭输送通道的特点,提出了选煤厂封闭式煤炭输送通道实时安全监控系统,主要对系统中带式输送机、煤尘浓度、烟雾的监测方法和细水雾喷淋消除安全隐患技术进行了研究,并设计了系统架构,给出了不同情况下的应急处置方案。通过对整个生产环节的信息进行实时全面监测,使生产过程的安全系数大幅提高,可在保障选煤厂安全生产的同时,有效提高选煤员工的劳动生产率,提升选煤厂经济效益。

新型高效间接加热炉开发与应用

由洛阳石油化工工程公司、胜利油田股份公司联合开发的新型高效间接加热炉,采用高效相变传热技术,以降低排烟温度和减少换热面积;优选应用热媒添加剂,以降低壳体的操作压力;应用高效燃烧器,以降低燃料燃烧的过剩空气系数和不完全燃烧损失;采用自动调节和自动控制系统,提高自动化控制水平。该间接加热炉已在胜利油田股份公司得到工业应用,结果表明:新型高效间接加热炉热效率达到93%以上,钢材耗量小于6t/MW;生产操作调节实现了自动化,整体技术水平达到国际领先水平。

“爆响剂代硫磺”和“三和粉”的开发与应用

本文分析了含硫磺烟花爆竹爆响剂的利弊;针对硫磺与氯酸钾配伍容易受外界能量刺激而引发安全事故,论述了一种新近开发的、能有效遏制烟花爆竹安全生产事故发生的“爆响剂代硫磺”和将爆竹将药所有可燃物以独特配方组合在一起、形成混合型可燃剂的“三和粉”新产品及其特性。

The safety parameters monitoring system for the coal mine based on CAN bus communication and intelligent data acquisition

In this paper,a monitoring and controlling system for the safety in production and environmental parameters of a small and medium-sized coal mine has been developed after analyzing the current domestic coal production and security conditions. The client computer can convert the analog signal about the safety in production and environmental parameters detected from the monitoring terminal into digital signal,and then,send the signal to the coal mine safety monitoring centre. This information can be analyzed,judged,and diagnosed by the monitoring-management-controlling software for helping the manager and technical workers to control the actual underground production and security situations. The system has many advantages including high reliability,better performance of real-time monitoring,faster data communicating and good practicability,and it can effectively prevent the occurrence of safety incidents in coal mines.

Analysis and Research for the Technology of Remote Transaction Mirror Image

The technology of remote transaction mirror image is a feasible, low-investment and well-effect disaster backup scheme in finance business system. The basic idea, construction, working principles and characteristic of remote transaction mirror image are presented in this paper. We analyze and compare similarities and differences among this disaster backup scheme and others usually used. The technology of remote transaction mirror image have the advantages such as less requiring of software and hardware system platform, low-investment, being able to control and restore lost data, insuring the data consistency and integrity.

Grain Production Driven by Variations in Farmland Use in China:An Analysis of Security Patterns

自从1978年改革开放以来,随着经济的迅速发展,中国的耕地利用格局发生了很大的变化。耕地数量和质量的变化直接导致粮食生产的变动。本文利用来自政府部门的农业统计数据,分析了1978-2004年间中国耕地利用水平的时空动态格局,并通过构建"粮耕弹性系数"来反映耕地利用变化与粮食生产的互动关系。研究结果表明:耕地投入的增加和质量的提升在一定程度上缓解了1978年以来我国耕地资源严重流失给粮食生产安全带来的压力;自改革开放以来,中国耕地利用水平呈现由经济快速发展带来的普遍性提升局面,并随着经济发展程度由东南沿海向内陆递减,耕地利用水平的提升速率也呈现由东南沿海向内陆梯级递减态势。然而,耕地集约利用程度的不断提升,并不一定会带来粮食产量的持续稳定增长。耕地集约利用增长的边际效用递减特性,使得中国粮食生产安全的保障已逐步由耕地集约利用水平的提升转向了耕地面积的保护,由此导致耕地资源的数量成为了左右粮食生产安全的关键,这也为当今中国制定严格的耕地保护目标和战略提供了现实的科学依据。