Question

an equipment used to separate insoluble solinds from blood

Answer 1

Evaporation. This is good for separating a soluble solid from a liquid (a soluble substance does dissolve, to form a solution). For example copper sulphate crystals can be separated from copper sulphate solution using evaporation. Remember that it is the water that evaporates away, not the solution.

Answer 2

Centrifuge is one of the best instruments that used to separate insoluble solids from blood and even in any solution.  

Centrifuge is a machine that rotate in a fixed axis in a rapid speed with a solution sample in order to separate the insoluble liquid in it. The rapid rotation of the centrifuge causes the liquid to move outward radial direction. This cause the objects with lesser weight to inward.