The Migration Features Of Polluted Underground Water And Simulation Of Pollution Control In Coal And Chemical Industrial Area

With the optimizing and upgrading of the energy structure and the emerging of coal and chemical enterprises, it promotes energy conversion and energy structure transformation in China, but at the same time, it also brings pollution risk to some extent. Focusing on this point, this article will study it deeply by way of spot-reconnaissance and survey, field experiments, analytic demonstration and so on. After studying the potential pollution risk in Coal and Chemical Industrial Area, the migration features of pollutant in underground water, the effect analysis and solutions of pollution controlling, etc, the good conclusion from them offers some scientific and proper suggestions to Coal and Chemical Industrial Area to prevent pollution.In this paper, it takes the coal and chemical intergration project in Huolin river as example.Combining with the real conditions, first, to analyze the potential pollution risk in Coal and Chemical Industrial Area and marks off high risk pollution area and normal one. Second, to be based on constructing numerical model of underground water to simulate and analyze the migration status in phenol recovery device area in Coal and Chemical Industrial Area, middle distillate storage area and the adjustment pool for wastewater and oil wastewater management by taking use of pollutant migration model to summarize the features of pollutant migration. Third, to do the effect simulation for 3 pollution control actions, that is earth surface hardening, cutoff wall and gutter by using this model. The result shows earth surface handening can reduce rainfall infiltration coefficient and weaken the source to reach the effect of controlling pollution, after pollutant magriates 3600 days, the acreage of pollution plume will reduce from 0.14km2 to 0.0975km successfully, the migration distance is from 2.2km to 1.4km, in the center of pollution plume, the acreage will reduce from 0.04km2 to 0.0025km2 where the concentration is higher than 40mg/L, and the highest concentration in the center is 45mg/L. The cutoff wall obstructs pollutant’s migration path, and has an obvious effect of controlling pollution migration in short time, after pollutant magriates 3600 days, the migration distance reduce from 2.2km to 1.4km successfully. The center area of pollution plume whose concentration is over 40mg/L will be controlled successfully out of cutoff wall to avoid pollutant flows out, but the concentration in the center of pollution plume is higher. The gutter can exhaust pollutant to reduce the concentration of pollutant in underground water and narrow the acreage of pollution area, after pollutant magriates 3600 days, it reduce the acreage of pollution plum from 0.14km2 to 0.065km2 successfully, and in the center of pollution plume, the acreage will reduce from 0.04km to 0 km2 where the concentration is higher than 40mg/L. and the highest concentration in the center is 20mg/L to 30mg/L which shows the effect of migration distance controlling is not remarkable. To synthesize 3 points above, it can get the solutions for pollution control.