Multi-fuel feeder distributor

A multi-fuel feeder for a stoker comprising:

• a throat through which waste fuel and coal are fed to the stoker;
• coal feed means discharging into said throat and having a rotor to throw coal into said stoker;
• and
• means for feeding waste fuel through said throat along a path spaced from said rotor of said coal feed means, said waste fuel feed means comprising,
• a feed chute, having an inlet and a spout feeding into said throat;
• air supply means;
• and
• vent means connected to said air supply means and located in said feed chute between said inlet and said spout in the direction of said spout.

A multi-fuel feeder for a stoker comprising:

• a throat through which waste fuel and coal are fed to the stoker;
• coal feed means discharging into said throat and having a rotor to throw coal into said stoker;
• means for feeding waste fuel through said throat along a path spaced from said rotor of said coal feed means, said waste fuel feed means comprising,
• a feed chute, having an inlet and a spout feeding into said throat;
• air supply means;
• and
• vent means connected to said air supply means and located in said feed chute between said inlet and said spout in the direction of said spout;
• and
• a counterbalanced damper extending across the feed chute and means to set said damper at any position across said feed chute to form a venturi throat across said feed chute.

A feeder for a stoker having waste fuel feed means, having air control means to provide air to be used in feeding fuel through said waste fuel feed means into said stoker, said air control means comprising:

• duct means attached to said feed means;
• air supply means;
• rotary damper means driven between maximum and minimum air flow positions for providing said feed means with pulsating air from said air supply through said duct means;
• and
• minimum flow damper means to control the air supply through the same said duct means when said rotary damper means is in said position of minimum air flow,
• wherein said rotary damper means and said minimum flow damper means control the air flow through the same duct means supplying air to said feed means.

A feeder for a stoker having a furnace and waste fuel feed means comprising:

• a feed chute having an inlet point and a discharge point;
• a counterbalanced damper extending across said feed chute upstream of said discharge point;
• and
• means to set said damper at any position across said feed chute to form a venturi throat across said feed chute upstream of said discharge point to allow feeding of fine, dry fuel without blow back from said stoker furnace.

A feeder for a stoker having waste fuel feed means comprising:

• a feed chute;
• a counterbalanced damper extending across said feed chute;
• means to set said damper at any position across said feed chute to form a venturi throat across said feed chute;
• and
• vent means located downstream of said damper and air supply means for said vent means to provide sweeping air in said feed chute.

A feeder for a stoker having waste fuel feed means comprising:

• a feed chute comprising a spout, discharge port means located at said spout and directed outwardly from said spout, and air supply means, to provide air to said port means to aid in the distribution of fuel fed into said stoker;
• a counterbalanced damper extending across said feed chute;
• means to set said damper at any position across said feed chute to form a venturi throat across said feed chute;
• and
• vent means located downstream of said damper.

A feeder distributor for a stoker having waste fuel feed means, comprising:

• a feed chute, having inlet means and a fuel discharge point;
• air supply means;
• vent means from said air supply means into said feed chute and between said inlet means and said fuel discharge point directed toward said discharge point, for providing swept air in the direction of said fuel discharge point;
• and
• air discharge means from said air supply means located at said fuel discharge point of said feed chute and directed outwardly for providing air to distribute said waste fuel into said stoker.

A multi-fuel feeder for a stoker including a furnace and a grate disposed in said furnace, comprising:

• a feed passage for fuel into said furnace;
• means for feeding coal along a path through said feed passage into said furnace having a fuel discharge point in said feed passage, and being combusted only after entering the furnace;
• and
• means separate from said coal feed means for feeding waste fuel through the same feed passage into said furnace along a path spaced from the path of coal from said coal feeding means in said feed passage, having a fuel discharge point located at substantially the same position in the feed passage as said coal feed means discharge point, whereby substantially all mixing of said coal and said waste fuel occurs in said furnace.