Injection system for solid particles

摘要

An injection system for solid particles comprises a conveying hopper (11) located at an upstream location (1), a fluidizing device (21) for fluidizing the solid particles at the outlet of the conveying hopper (11) and forming a solid-gas flow, a pneumatic conveying line (15) for conveying the solid-gas flow from the fluidizing device (21) to a downstream location (2) and a static distribution device (17) with a plurality of injection lines (19), connected thereto. An upstream flow control system controls the mass flow rate in the pneumatic conveying line (15) at the upstream location (1) by controlling the opening of an upstream flow control valve (35) responsive to the solid material mass flow measured in the pneumatic conveying line (15) at the upstream location (1). A downstream flow control system controls the mass flow rate in the pneumatic conveying line (15) at the downstream location (2) by controlling the opening of a downstream flow control valve (51, 79i) responsive to the instantaneous mass flow rate sensed by a main downstream mass flow rate sensor (53).

主权项

1. An injection system for solid particles, said injection system being configured for conveying a solid-gas flow including solid particles from an upstream location to a downstream location, said injection system comprising:
a conveying hopper located at said upstream location; a fluidizing device for fluidizing the solid particles at the outlet of said conveying hopper and forming said solid-gas flow; a pneumatic conveying line for conveying said solid-gas flow from said fluidizing device to a downstream location, said pneumatic conveying line including at said downstream location a static distribution device with a plurality of injection lines connected thereto; an upstream flow control system including: an upstream flow control valve arranged in said pneumatic conveying line at said upstream location; and an upstream mass flow rate determination device capable of measuring an instantaneous solid material mass flow in said pneumatic conveying line at said upstream location; said upstream control system being capable of controlling the mass flow rate in said pneumatic conveying line at said upstream location by controlling the opening of said upstream flow control valve responsive to a solid material mass flow measured in said pneumatic conveying line at said upstream location; a downstream flow control system including: at least one downstream flow control valve arranged in said pneumatic conveying line at said downstream location upstream of said static distribution device; and a main downstream mass flow rate sensor arranged in said pneumatic conveying line at said downstream location upstream of said static distribution device and capable of measuring a downstream instantaneous mass flow rate, said downstream control system being capable of controlling the mass flow rate in said pneumatic conveying line at said downstream location by controlling the opening of said at least one downstream flow control valve responsive to said instantaneous mass flow rate sensed by said main downstream mass flow rate sensor.