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第五章 工 业 通 风 设 计 要 点 PowerPoint PPT Presentation


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第五章 工 业 通 风 设 计 要 点. 通风设计是职业病危害防护工程设计的主要组成部分,合理的通风设计可以用最少的能耗、最经济的方式把作业场所的有毒有害物质有效地控制,经净化后排出车间或将新鲜风流送入作业场所,使作业人员不受有毒有害物质的危害,减少和消除职业病的发生。. 对职业病危害防护工程作预评价、 审查防护工程设计工作,首先应了解建设单位设计的防护工程是否合理,验算其参数,知道该防护工程是在什么样条件下设计的,是否可行,这一点对评价队伍来说是很重要的,只有做到心中有数,才能对其评价。故我们应了解通风设计的要点与方法。. 局部通风系统设计要点及方法.

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第五章 工 业 通 风 设 计 要 点

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  • Q

  • QVS m3/s

  • V ------ m/s

  • S ----- m2


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m/s

0.25--0.5

0.5--1.0

1.0--2.5

2.5----10


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  • HHH


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1

  • H=9.8aPLQ2/S3 Pa

  • a ------

  • P ------ m

  • L ------ m

  • Q ------ m3/s

  • S ------ m2


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2

  • H=9.8cSmrQ2/2gS-Sm3 Pa

  • c ------

    Sm ---- m2

    r ------ Kg/m3

    g ------- m/s2


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3

  • H= 9.8f1rQ2/2gS12 Pa

  • f 1 -----

    S1 ----- 1 m3/s


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4H


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  • 1

  • Q=Q1+Q2+Q3++Qn Q

  • Q=KQ m3/s

  • K --------


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2 Pa

  • H=H+H+H+H+H+H

  • H--------- H-------

  • H---------

  • QH


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  • 3

  • H= RQ2

  • QRRH

  • HQRB

  • AHQRC

  • 90D


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A

B

C

D


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