hello aspirant,
yes there are so many colleges offering part time b.tech and among them i will provide you the top 4 universities which  has got higher rankings and the best teaching requirements provided with a enriched education.
1)SRM institute of technology,chennai
2)ANNA  university ,chennai
3)st.joseph's college of engineering ,chennai
4)Alagappa college of technology ,chennai.

hope the above information is helpful to you
thank you