How to reload a custom library

I have created a custom library which depends on session data.

In my main controller i am initializing session values and want to reload custom library based on new values every time page is refreshed.
Hence, i am using session_destroy(); at the end of my controller method.

But on page refresh library are not reloaded : 

Code:

closeOrders class already loaded. Second attempt ignored.

Is there any way i can reload some library again on page refresh.

Thanks for the reply.
I wanted to reload library to populate with updated session data.


Now using Session Flash Data to refresh data on every request and its working fine.
https://www.codeigniter.com/user_guide/l...:flashdata

Thanks for the help.