Plant for the controlled-speed pneumatic transport of granular material and conveyance speed control process

A plant for the transport of plastic granular material, comprising:

• at least one container for plastic granular material to be transported,
• at least one or more receiver-meters corresponding in number with said containers
• one or more conveyance ducts corresponding in number with said containers each of which being in fluid connection with said corresponding container and said corresponding receiver meter,
• depressurization structure for creating a relative vacuum,
• at least one vacuum duct corresponding in number with said receiver-meters and being in fluid connection with said depressurization structure and said corresponding receiver-meter,
• each of said conveyance ducts being in fluid connection with said corresponding vacuum duct through said corresponding receiver-meter,
• a speed detection structure located in each of said vacuum ducts,
• a motorized valve vacuum regulating structure in fluid connection with each of said receiver meters,
• an electronic speed detection control unit structure in communication with said speed detection structure,
• said depressurization structure, said receiver-meters, and said vacuum regulating structure,
• and a cleaning valve in fluid connection with each of said conveyance ducts,
• wherein a flow of plastic granular material from each of said containers can be individually continuously and automatically adjusted.