I am using Wiris editor plugin in ckeditor.
The Equations i type are saved as .png in wiris_plugin/cache_folder.
is there any way to call this images as img src tag and store it in database
By default, our plugins work in full MathML mode (http://www.wiris.com/plugins/docs/full-mathml-mode) storing formulas as MathML in the database. However, if you prefer, you can store them as HTML img tags changing wiriseditorsavemode=image in your configuration.ini file as detailed in the documentation link provided earlier.