Kim Zolciak's BF Kyle Demands Her Ex Kroy Biermann Stay Away From Kyle's Kids

Kim Zolciak's boyfriend, Kyle Mowitz, is begging a judge to keep "The Real Housewives of Atlanta" alum's estranged husband, Kroy Biermann, away from Kyle's kids ... TMZ has learned.  In new court docs obtained by TMZ, Kyle calls out his…