The invention discloses an agricultural product low-temperature negative-pressure
drying and crushing integrated method and a
system. The agricultural product low-temperature negative-pressure dryingand crushing integrated method comprises the following steps that (1) under the conditions of the negative pressure and the low temperature, agricultural products are subjected to turbulent-flow heating by reverse hot air in the process of moving from top to bottom under the self-weight action, then the agricultural products are
cut and impacted, and after the agricultural products are crushed into agricultural product
powder, the agricultural product
powder ascends along with
airflow to form a turbulent flow and is subjected to severe heat exchanging, so that the agricultural product
powder is quickly dried; (2) under the conditions of the negative pressure and the low temperature, the agricultural product powder continuously ascends along with the
airflow to be subjected to rotational-flow
drying, so that the agricultural product powder is further subjected to heat exchanging
drying; (3) gas-
solid separation is conducted, and the dried agricultural product powder and
tail gas are separated; and (4) under the conditions of the negative pressure and the low temperature, the
tail gas is subjected to dust removing treatment, remained parts of the dried agricultural product powder arecollected. The agricultural product low-temperature negative-pressure drying and crushing integrated method and the
system can realize quick drying and crushing of the agricultural products, and hasthe advantages that the
system is saving in energy, quick in start-up, controllable in scale, reliable in industrialization, easy to operate, simple in system and the like.