Atmospheric Environmental Risk Assessment of LNG Refueling Stations Based on SLAB and AFTOX Models
By setting up environmental risk accident scenarios for LNG refueling stations,SLAB and AFTOX models were used to simulate and predict the atmospheric environmental risk impact of associated/secondary pol-lutants CO from LNG refueling station leaks and fires.The results indicate that under the risk accident scenario,the maximum concentrations of methane and CO at different distances within a 5km downwind direction did not exceed the atmospheric toxicity endpoint concentration.The maximum concentration of methane occurred at a dis-tance of 10m downwind,with a concentration value of 32637.575 mg/m3;The maximum concentration of CO oc-curs at 5km downwind,with a concentration value of 1.746E-4 mg/m3.Considering the danger of low-temperature liquid LNG and the uncertainty of accident triggering,LNG refueling stations still need to focus on taking risk prevention measures during operation,preparing emergency plans for unexpected environmental events,establis-hing a corporate/regional environmental risk prevention and control system,and effectively preventing and con-trolling environmental risks.
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