浊盐水自由沉降与太阳池降浊增效实验研究

通过实验室内浊盐水自由沉降实验分析不同盐度、工质及温度下的浊度变化规律,提出采用多孔介质吸附剂进行物理降浊的方法,讨论了4种多孔介质材料的降浊效果;建立2个表面积为2.4m×2.4m、深1.2m的小型盐水太阳池,进行了添加多孔介质的浊度对比实验;通过对实验数据的非线性拟合构建了太阳辐射透射率混合回归模型.结果表明:盐水浊度去除率比卤水高10%左右;盐度从0.2%增至20%时,盐水浊度去除率降低了8%;加入不同多孔介质后,灰尘颗粒自由沉降速度加快,浊度去除率可升高3%~13%;在太阳池内添加多孔介质可有效降低池水浊度,增加池内的太阳辐射透射率.

Experimental study of free subsidence of turbidity brine and efficiency-enhanced method in solar pond

The free subsidence features of turbidity brine under different salinities working mediums and temperatures were discussed by laboratory experiments. A new physical treatment method of turbidity reduction was applied to solar pond by introducing porous adsorbent and the turbidity restraint effects of four types of porous mediums were investigated. Two mini-solar ponds with area of 2.4 m×2.4 m and depth of 1.2 m were built and one of them was filled with porous medium at the bottom. A mixed regression model of solar radiation transmittance was put forward based on the nonlinear fitting of the experimental data. The experimental results show that the turbidity removal ratio of salt water is about 10% higher than that of brine. When the salinity increases from 0.2% to 20% the turbidity removal ratio of salt water is reduced by 8%. The free subsidence speed of dust particles is enhanced and the turbidity removal ratio can be increased by 3%-13% after different porous mediums are filled in salt-gradient solar pond. Porous mediums can effectively reduce the water turbidity and increase the solar radiation transmittance in the solar pond.