system layout opinions

sorry no diagram yet but would like opinions. ill do my best to explain

system layout: 2 pressurized loops and a open storage tank

biomass 40 in outbuilding on a 007 pump supplying a flat plate heat exchanger and back to boiler. of course the 3 way and expansion tank and such things. i understand all the tech things like pump placement and that stuff.

The second loop will be the main loop going to the house off the flat plate using a 011 pump ( house has radiant floor, forced air coil, dhw) which will stay on 24/7 .
coming back from the house the main loop will go into a open homemade storage tank with a heat exchanger in it and out of the tank back into the flat plate to pick up more btu's from the boiler loop and back to the house and so on and so on.
Question? will this system be able to store btu's and work at all or am i missing something. (i do understand most of the diff ways of doing this that most of you have done already but just want to know if this will work?) my idea is like most systems to store the heat on one burn a day and live off of the stored btu's in the main house loop (storage).

thanks for any comments i will explain the tank and heat exchanger in it later.

it is correct that the boiler goes to the house first before the storage and not directly to the storage.

my main loop will run constant: flat plate through dhw then through forced air coil then past floor heat( controlled by a separate pump on thermostat's) then back to storage and then ending up at the flat plate. constant flow in that series so no on/off except for the floor heat controlled by other pumps.

my only thought to isolate was so the boiler loop could stay hotter and that the controller on the boiler would turn that 007 pump on and off as heat to main loop is needed. also i could work on boiler if needed and still use the 700 gal of storage to live with for a short while.

i may still just use one main loop and do away with 2 loops using one pump.

this is not the most ideal storage that it dumps heat and gives heat. its just adding the 700 gal to the system for storage of btu. i of course can always bypass the storage with valves just like every single heat zone i have in the system i can work on any pump, heat exchanger at any time and not disturb the flow. many many valves and such.