Maybe you can move the pump. You have only a sketch, doesn't necessary have to be exact. The sketch shows a tangential nozzle so the exchanger is not alligned with the vessel.
Some slurry pumps are special design to withstand the thrust but you must talk with the vendor.
Slurry service is different than normal service.
If you will use rubber belows, you will have to use filled arch belows which will increase the stiffness.