Create an equipment illustration

Create an illustration which represents silos (cement silo) attached is an image. I need this silo to be shown on a html page with 2 boxes showing the flow rate (which will render on top of the image). I have shown some other examples but not on html page. Help me visualize this on a html page, and show me similar designs you might have done previously to get the job. Awe me and get the job :), look at the attachment for more information.