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831.
韩继明 《安全.健康和环境》2021,21(3):14-17
由某起爆炸着火事故案例,探讨液化烃装卸区域总图布置、车辆管理、设备设施、控制系统等方面存在的主要风险,并系统性探讨相应的解决措施。 相似文献
832.
Primary steelmaking involves CO2-intensive processes, but the expansion of secondary steel production is limited by the global availability of steel scrap. The present work examines global scrap consumption in the past (1870–2012) and future scrap availability (2013–2050) based on the historical trend. The results reveal that (i) historically, the consumption of old scrap has been insufficient compared with the amounts of discarded steel, and (ii) based on historical scrap consumption, the future availability of scrap will not be sufficient to satisfy the two assumed cases of steel demand. Primary steelmaking is expected to remain the dominant process, at least up until 2050. Under the reference-demand case of 2.19 billion tons in crude steel production by 2050, the total production of pig iron and direct reduced iron could reach 1.35 billion tons. Consumption of old scrap could reach 0.76 billion tons. Because the availability of scrap will be limited in the context of the global total, it is important to research and develop innovative low-carbon technologies for primary steelmaking and to explore their economic viability if we are to aim for achieving large reductions in CO2 emissions from the iron and steel industry. 相似文献
833.
834.
835.
纺织厂地下尘室是着火最多又不易扑救之处。本文介绍了沉降式和网罩过滤式、布袋过滤式尘室,同时分析了粉尘爆炸的特点、条件及防止其爆炸、火灾的方法。 相似文献
836.
介绍了目前国际上粉尘爆炸强度分级方法及分级判据,并对其存在的问题进行了分析,在此基础上提出新的等级划分及分级判据。 相似文献
837.
《Process Safety and Environmental Protection》2014,92(4):300-304
When transferring powder through pipes or hoses made from insulating material, propagating brush discharges cannot be excluded. To calculate the limit value of the resistivity of the insulating material, below which no propagating brush discharges will occur, the charging current due to the powder transfer must be known. This charging current has been determined experimentally. Based on analytical calculations and computer models limit values for the resistivity of the hose material are derived from these experiments. 相似文献
838.
The safety characteristics pmax and KSt of a flammable dust are usually determined in a closed apparatus (20 l- or 1 m3-vessel). The results are strongly influenced by the parameters of the apparatus (e.g. the volume, geometry, dispersion system). The aim of this project is to investigate whether there is a correlation between pmax and KSt on the one hand and the calorific value HS and the specific surface area Sm of the dust on the other. In an experimental study, around 200 dust samples from different sectors of industry will be analysed. The analysis of around 102 dusts shows that the correlation may be described by a logarithmic function. Owing to differences in reaction mechanism it is reasonable to formulate different functions for different substance groups (e.g. metals, organic materials). This may lead to an algorithm which can predict pmax and KSt from HS and Sm within a defined range of error. 相似文献
839.
对热水锅炉爆炸事故的热力学机理进行详尽的分析基础上,提出了相应的预防及其解决问题的办法。 相似文献
840.
G. A. Lunn 《Journal of Loss Prevention in the Process Industries》1989,2(4):200-208
Various methods that are available for estimating the explosion venting requirements of weak dust handling equipment are compared. The regression analysis that Simpson has performed on the well known Kst nomographs is shown to extend to Kst values less than 50 bar m s−1 and to reduced explosion pressures between 1.1 bar a and 1.2 bar a. 相似文献