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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万方数据
