Plan layout of chemical plants
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On the general layout plans of chemical plants or chemical processing units, I noticed two issues while reviewing the documents, and I would like to bring them up for discussion: According to one approach, open flames, heating furnaces, flares, etc. should be located upwind of the wind direction with the highest frequency throughout the year； The second approach is to locate open flames, heating furnaces, flares, etc., downwind of the direction of the wind at the minimum frequency. Between these two statements, which one should be followed when the winds at these two frequencies are no longer on the same straight line? I would appreciate advice from all fellow sailors!
First, it is necessary to refer to the wind rose charts provided by the local meteorological agency, followed by the principles underlying the operation of these devices. Consider whether the downwind side of such facilities might be affected by their influences. For reference.
Process units that emit flammable gases are located upwind of open flames or spark-producing areas, in the direction of the wind with the lowest frequency of occurrence throughout the year. The plant-wide elevated flare is located on the upwind side of the wind direction with the lowest frequency throughout the year in the production area.
Whether to locate facilities on the upwind or downwind side should be determined based on the protected areas. For chemical processing plants, from an environmental protection perspective, it is generally recommended that such facilities emitting waste gases be situated on the downwind side of the prevailing wind direction throughout the year; this arrangement helps to minimize the impact of gas emissions on sensitive protected areas. For reference only.
They should be arranged upwind of the wind with the highest frequency throughout the year, such as in the case of open flames and heating furnaces； The elevated torch is located downwind of the wind direction corresponding to the minimum frequency wind (as there is a concern about combustible liquids flying out, being downwind is safer)
When the frequency wind is no longer on the same straight line, one should follow the upwind side of the wind with the lowest frequency throughout the year; this principle should be easy to understand
Downwind side of the wind direction with the lowest frequency throughout the year
The upwind side of the wind with the lowest frequency overall shall prevail! ! !