崩溃侠对《Guidelines for Combustible Dust Hazard Analysis》的笔记(6)

Guidelines for Combustible Dust Hazard Analysis
  • 书名: Guidelines for Combustible Dust Hazard Analysis
  • 作者: CCPS (Center for Chemical Process Safety)
  • 页数: 256
  • 出版社: Wiley-AIChE
  • 出版年: 2017-5-1
  • 第10页
    A lesson here is that even a weakly explosive and hard to ignite dust is still combustible, and therefore still hazardous and capable of causing fatalities when ignited.

    粉尘爆炸即便很弱,造成人员死伤的危险依然存在 —— 这是宝贵的一课。

    2019-02-11 14:07:59 回应
  • 第15页
    In some cases, an organization may request the test be run on the material as sampled from the process to avoid having an overly conservative design. The risk in doing this is that finer, dryer material might accumulate in some parts of the process, or be created during start up, shutdown or upset conditions. If such material is dispersed and ignited, the characteristics of the in-process material will not represent that finer portion, resulting in insufficient protection in some parts of the process.

    客户可能出于节约防护成本、尽快通过政府审查等原因,希望得到理想的评估结论,往往要求在采样时,选择加工设备中比重大的粒径成分。然而对于评估来讲,要“做最坏打算”,防微杜渐,必须选择最细的粉尘,例如附着在除尘器内壁的样品。

    2019-02-11 14:12:34 回应
  • 第30页
    Inside most solids handling equipment, the first 4 elements already exist. Only a source of ignition is needed for an explosion to occur.

    在许多工艺设备中,可爆粉尘环境、空气、密闭空间均是正常工况,一旦出现点燃源,便极有可能发生爆炸。因此预防爆炸的主要手段就是消除各种潜在的点燃源。

    2019-02-11 14:15:39 回应
  • 第31页
    If filtered air is recycled into the building it can lead to return of flames and/or pressure returning into the processing area in the event of a fire or dust explosion.

    出于节能考虑,大功率的除尘系统可能采取向车间回风的措施,此时必须考虑防止除尘系统内的火焰向车间传播。应采取风扇连锁停机以及回风管道上的自动防火阀门。

    2019-02-11 14:18:45 回应
  • 第34页
    Monitor the feed rates to the mill; alarm or shut down for feed rate deviations

    破碎、研磨类设备要防止喂料过多,宜安装进料速率的监控设施。

    2019-02-11 14:21:45 回应
  • 第81页
    This is in line with the concept of As Low as Reasonably Practical (ALARP). ALARP requires that risk reduction options continue to be pursued until the benefit of the incremental cost of resources needed to implement them is grossly disproportionate to the risk reduction achieved.

    在经济条件允许的情况下,尽量做到最完善的安全防护 —— 这是从企业角度考虑。但是在中国的特殊情况下,往往无法与企业客户达成就此问题上的共识,因此必须在合同签署之前明确告知经济投入、政府监管部门要求、各领域专家意见的风险,以免造成不必要的损失。

    2019-02-11 14:32:01 回应