After 24 hours of an intercourse, there is a white discharge from the vagina of my wife. It appears as solid white clots and the wall of the vagina goes dry. This continues for 5 days. This happens only if the semen is discharged into her vagina. If I don't discharge the semen inside her, she doesn't suffer from any problem. Is my semen causing the problem. What is the white discharge and what is the solution to it? Please help

I honestly don't know. It could be some sort of fungal infection which causes this discharge, or it could be something quite separate.

Any unusual discharge or bleeding from the vagina, should ALWAYS be see to by a doctor. He or she is the best person to consult.

It could be nothing more than your seminal fluids leaking out.

It could be your semen, or it could also be a yeasty discharge.
If she does not have any discomfort, then it is most likely not a full-blown yeast infection. (I have a flaky white discharge sometimes as well, and that's what my doc told me)
It's best to go check with your doctor just to be sure, but it sounds like nothng serious.