The Similar Experimental Study on the Concentration Field in Construction Period of the Storage of Salt Rock in Solution Mining

Abstract

The Jin-tan underground energy storage of salt rock in Jiangsu Province as a demonstration project, Established a similar model experimental platform of concentration filed in construction period of salt caverns, which based on the similar theory of dimensional analysis. To analysis the concentration distribution and the concentration field variation in cavity. The study shows that: the brine concentration in the same horizontal plane is uniformly distributed beyond the boundary layer where has a higher concentration than other locations, but a continuous gradient distribution of brine concentration increases with depth in the vertical direction. In the vertical direction, the brine concentration gradient firstly increases and then decreases with the increase of the freshwater flow in the reverse circulation method. And in the vertical direction, the brine concentration gradient also firstly increases and then decreases with the increase of the distance between the two wash pipes in the reverse circulation method. Comparing with the reverse circulation method, the brine concentration gradient in the vertical direction is very insignificant with direct circulation. During the solution of mining of the salt cavity, the brine concentration increases as time goes on, and the rate of increase continues to decrease until the concentration field to stabilize.