Gas explosion's influence on plant layout

Gas explosion's influence analyzing on plant layout was divided into three steps, which were flammable gas scope confirmation, explosion energy confirmation and distance confirmation for different units. Considering both the maneuverability and creditability of the system, appropriate methods were proposed for the three steps: suitable empirical gas dispersion models for flammable gas scope confirmation; TNO multi-energy model for explosion energy confirmation; shock wave's different harm classes on people and facility were chosen as performance-based targets for distance confirmation between different units. With ALOHA as the gas dispersion computation tool, a plant layout design drawing of a methanol decomposing hydrogen factory in Nanjing was taken as an example to demonstrate the flow, from which the disadvantages of the design drawing are brought forward, and a new plant layout design drawing is put forward, and the feasibility of the flow is thereby validated.