# Application of Extension Engineering in Safety Evaluation of Chemical Enterprises
## 4 Evaluation and Analysis of Safety and Environmental Data of Each Workshop in Chemical Enterprises

Table 4: Classical field of indoor safety and environment indexes (N1). Figure 4: The data collection scheme diagram of workshops in the chemical plant. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \(\mathbf{N_{2}}\) & **Nonrisk U1** & **Light Risk U2** & **Medium Risk U3** & **Heavy Risk U4** \\ \hline outdoor temperature & \(\langle 32.18,33.86\rangle\) & \(\langle 33.86,35.06\rangle\) & \(\langle 35.06,35.82\rangle\) & \(\langle 35.82,36.75\rangle\) \\ outdoor humidity & \(\langle 39.63,47.85\rangle\) & \(\langle 30.02,39.63\rangle\) & \(\langle 18.86,30.02\rangle\) & \(\langle 8.62,18.86\rangle\) \\ light & \(\langle 570.95,13,980.85\rangle\) & \(\langle 13,980.85,27,390.85\rangle\) & \(\langle 27,390.85,40,800.85\rangle\) & \(\langle 40,800.85,54,158.65\rangle\) \\ wind & \(\langle 23.85,30.72\rangle\) & \(\langle 16.58,23.85\rangle\) & \(\langle 9.32,16.58\rangle\) & \(\langle 1.78,9.32\rangle\) \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Classical field of outdoor meteorological indexes (N2). \[\left( \begin{array}{ll}\text{indoor safety and environment indexes}&\text{hydrogen concentration}& \langle 0,1\rangle\\ &\text{hydrogen sulfide concentration}&\langle 0,1\rangle\\ &\text{methane concentration}&\langle 0,1\rangle\\ &\text{indoor temperature}&\langle 34,42\rangle\\ &\text{indoor humidity}&\langle 1.3,8.6\rangle\\ &\text{noise}&\langle 99,100\rangle\\ &\text{voltage}&\langle 220,240\rangle\\ &\text{thermal comfort index}&\langle 1,3\rangle\\ &\text{visible light}&\langle 2,4\rangle\\ &\text{outdoor meteorological indexes}&\text{outdoor temperature}&\langle 32,37\rangle\\ &\text{outdoor humidity}&\langle 7,50\rangle\\ &\text{light}&\langle 527,54169\rangle\\ &\text{wind}&\langle 0,32\rangle\\ \end{array} \right)\]  
According to the actual situation of the chemical factory studied in this paper, the index value of the matter element to be evaluated is determined. Taking hydrogen production in the first workshop as an example, the index value is:  
\[\left( \begin{array}{ll}\text{indoor safety and environment indexes}&\text{hydrogen concentration}& \langle 0.12,0.18\rangle\\ &\text{hydrogen sulfide concentration}&\langle 0.18,0.23\rangle\\ &\text{methane concentration}&\langle 0.21,0.28\rangle\\ &\text{indoor temperature}&\langle 34.96,35.26\rangle\\ &\text{indoor humidity}&\langle 8.12,8.47\rangle\\ &\text{noise}&\langle 99.10,99.28\rangle\\ &\text{voltage}&\langle 223.35,227.50\rangle\\ &\text{thermal comfort index}&\langle 1.52,1.78\rangle\\ &\text{visible light}&\langle 2.32,2.62\rangle\\ &\text{outdoor temperature}&\langle 32.58,33.72\rangle\\ &\text{outdoor humidity}&\langle 40.28,45.02\rangle\\ &\text{light}&\langle 820.32,12900.85\rangle\\ &\text{wind}&\langle 27.85,29.95\rangle\\ \end{array} \right)\]  
The second workshop:  
\[\left( \begin{array}{ll}\text{indoor safety and environment indexes}&\text{hydrogen concentration}& \langle 0.32,0.45\rangle\\ &\text{hydrogen sulfide concentration}&\langle 0.42,0.50\rangle\\ &\text{methane concentration}&\langle 0.20,0.27\rangle\\ &\text{indoor temperature}&\langle 36.87,38.12\rangle\\ &\text{indoor humidity}&\langle 6.82,7.46\rangle\\ &\text{noise}&\langle 99.62,99.72\rangle\\ &\text{voltage}&\langle 230.42,232.62\rangle\\ &\text{thermal comfort index}&\langle 2.28,2.46\rangle\\ &\text{visible light}&\langle 2.89,2.96\rangle\\ &\text{outdoor meteorological indexes}&\text{outdoor temperature}&\langle 34.05,34.87\rangle\\ &\text{outdoor humidity}&\langle 32.87,34.98\rangle\\ &\text{light}&\langle 15302.85,23870.98\rangle\\ &\text{wind}&\langle 18.02,21.98\rangle\\ \end{array} \right)\]  
The third workshop:\[\left(