Corn fiber processing system and wet milled corn starch processing system using same

A maize fiber processing system for extracting maize starch, the system comprising:

• a pressure curved screen group, a fiber washing sink group, an enzyme preparation adding device and an external enzyme reaction tank, wherein,
• the pressure curved screen group has multiple pressure curved screens, the pressure curved screens separate fiber slurry containing starch and protein into screen overflow and screen underflow, and each of the pressure curved screens has a fiber slurry inlet, a screen overflow outlet and a screen underflow outlet;
• the fiber washing sink group provides a place for washing the fiber slurry by washing water, the fiber washing sink group has multiple fiber washing sinks, and each of the fiber washing sinks has a screen overflow feeding port, a screen underflow feeding port and a discharge port;
• the enzyme preparation adding device adds enzyme preparation into the maize fiber processing system;
• and
• the external enzyme reaction tank is connected to a discharge port of a middle fiber washing sink, the external enzyme reaction tank receives the fiber slurry in the middle fiber washing sink the fiber slurry is returned back to the fiber slurry inlet of a next pressure curved screen posterior to a middle pressure curved screen through a returning pipe after a predetermined time wherein the screen underflow contains screen underflow washing water, a screen underflow washing water dividing pipe is provided in a second pressure curved screen posterior to the middle pressure curved screen, the screen underflow washing water dividing pipe divides part of the screen underflow washing water, so as to control dry substance concentration in the external enzyme reaction tank, the remaining screen underflow washing water is transported to the screen underflow feeding port of the middle fiber washing sink, and the divided screen underflow washing water flows back into the maize fiber processing system by the screen underflow washing water dividing pipe.