APPARATUS AND METHOD FOR A DRYER

A dryer adapted for use in an asphalt plant. The dryer comprises a drum having an inner wall and a plurality of flights, each of which is disposed on the inner wall of the drum and each of which has a proximal end and a distal end spaced apart from the proximal end. At least one of the plurality of flights comprises a V-shaped notch. A method for drying components of asphalt comprising drying the components of asphalt in the drum of such a dryer. 1. A dryer adapted for use in an asphalt plant , said dryer comprising:(a) a drum, said drum having an inner wall;(b) a plurality of flights, each of said plurality of flights being disposed on the inner wall of the drum and each of said plurality of flights having a proximal end and a distal end spaced apart from the proximal end;wherein at least one of the plurality of flights comprises a V-shaped notch.2. The dryer of wherein the plurality of flights are arranged substantially parallel to each other.3. The dryer of wherein the V-shaped notch is disposed in a central portion of the distal end of the at least one of the plurality of flights.4. The dryer of wherein the V-shaped notch extends from the distal end of the at least one of the plurality of flights toward the proximal end of the at least one of the plurality of flights.5. The dryer of wherein each of the plurality of flights comprises a first extending portion which is adjacent to the proximal end.6. The dryer of wherein each of the plurality of flights comprises a second extending portion which is adjacent to the first extending portion.7. The dryer of wherein each of the plurality of flights comprises a third extending portion which is adjacent to the second extending portion.8. The dryer of wherein each of the plurality of flights comprises a fourth extending portion which is adjacent to the third extending portion and extends to the distal end.9. The dryer of wherein the V-shaped notch extends from the distal end of the at least one of the plurality of flights ...

Apparatus and method for an asphaltic material control system

A system for controlling the production of an asphalt mix. The preferred system comprises an asphaltic material source, an asphaltic material sensor, a liquid asphalt cement source, a liquid asphalt cement meter, and a controller. The asphaltic material sensor communicates the amount of asphaltic material liquid asphalt cement and the amount of asphaltic material moisture contained in the amount of asphaltic material to the controller, the liquid asphalt cement meter communicates the amount of liquid asphalt cement provided by the liquid asphalt cement source to the controller, and the controller controls the amount of asphaltic material provided by the asphaltic material source and the amount of the liquid asphalt cement provided by the liquid asphalt cement source. A method comprising controlling the amount of asphaltic material and the amount of liquid asphalt cement provided to the asphalt mix substantially continuously and substantially in real time.

APPARATUS AND METHOD FOR AN ASPHALTIC MATERIAL CONTROL SYSTEM

A system for controlling the production of an asphalt mix. The preferred system comprises an asphaltic material source, an asphaltic material sensor, a liquid asphalt cement source, a liquid asphalt cement meter, and a controller. The asphaltic material sensor communicates the amount of asphaltic material liquid asphalt cement and the amount of asphaltic material moisture contained in the amount of asphaltic material to the controller, the liquid asphalt cement meter communicates the amount of liquid asphalt cement provided by the liquid asphalt cement source to the controller, and the controller controls the amount of asphaltic material provided by the asphaltic material source and the amount of the liquid asphalt cement provided by the liquid asphalt cement source. A method comprising controlling the amount of asphaltic material and the amount of liquid asphalt cement provided to the asphalt mix substantially continuously and substantially in real time.

ASPHALT PRODUCTION PLANT WITH PRE-DRYER ASSIST

A combination of components for use in making asphalt concrete from a mixture of virgin aggregate material with recycled asphalt products and/or recycled asphalt shingles encompasses a direct dryer for heating virgin aggregate material; a pre-dryer for heating recycled asphalt product and/or recycled asphalt shingles, said pre-dryer using warm exhaust gas from said direct dryer to heat the recycled asphalt product and/or recycled asphalt shingles; and means for conveying warm exhaust gas from said direct dryer to said pre-dryer. 1. A combination of components for use in making asphalt concrete from a mixture of virgin aggregate material with recycled asphalt products and/or recycled asphalt shingles , said combination comprising:(a) a direct dryer for heating virgin aggregate material, said direct dryer being adapted to generate warm exhaust gas while heating said virgin aggregate material;(b) a pre-dryer for heating recycled asphalt product and/or recycled asphalt shingles, said pre-dryer using the warm exhaust gas from said direct dryer to heat the recycled asphalt product and/or recycled asphalt shingles; and(c) means for conveying the warm exhaust gas from said direct dryer to said pre-dryer.2. The combination of wherein said combination of components is used in a continuous asphalt production system.3. The combination of wherein said combination of components is used in a batch asphalt production system.4. The combination of wherein said direct dryer comprises a fixed outer drum and a rotating inner drum.5. The combination of which includes a controller that is adapted to adjust the rotational speed of the rotating inner drum in order to adjust the temperature of the warm exhaust gas from the direct dryer.6. The combination of wherein the controller is adapted to:{'b': '8', '(a) operate the direct dryer by rotating the inner drum of the direct dryer at a base level of approximately rotations per minute;'}(b) reduce the rotational speed of the inner drum when ...

BULK MATERIAL UNLOADING SYSTEM

A bulk material storage container assembly for storing and unloading particulate material includes a storage vessel adapted to hold particulate material. A discharge port is in fluid communication with the storage vessel and with a discharge port outlet. The discharge port is also sized and shaped to facilitate bridging of particulate material. A shaft is mounted within the storage vessel adjacent to the discharge port and adapted for reciprocal movement with respect to the discharge port. A rake is mounted on said shaft and adapted to disaggregate particulate material that has bridged proximate the discharge port as the shaft is reciprocated with respect to the discharge port. 1. A bulk material storage container assembly for storing and unloading particulate material , said bulk material storage container assembly comprising:(a) a storage vessel adapted to hold particulate material; (i) in fluid communication with the storage vessel;', '(ii) in fluid communication with a discharge port outlet;', '(iii) sized and shaped to facilitate bridging of particulate material;, '(b) a discharge port which is(c) a shaft mounted within said storage vessel adjacent to the discharge port and adapted for reciprocal movement with respect to said discharge port;(d) a rake mounted on the shaft and adapted to disaggregate particulate material that has bridged proximate said discharge port as the shaft is reciprocated with respect to the discharge port.2. The bulk material storage container assembly of wherein the discharge port comprises an opening that provides fluid communication from the storage vessel into the discharge port claim 1 , which opening is sized and shaped to facilitate bridging of particulate material.3. The bulk material storage container assembly of further comprising a material driving member which is:(a) located in the discharge port;(b) adapted to move particulate material within the discharge port to the discharge port outlet.4. The bulk material storage ...

Apparatus and method for a dryer

A dryer adapted for use in an asphalt plant. The dryer comprises a drum having an inner wall and a plurality of flights, each of which is disposed on the inner wall of the drum and each of which has a proximal end and a distal end spaced apart from the proximal end. At least one of the plurality of flights comprises a V-shaped notch. A method for drying components of asphalt comprising drying the components of asphalt in the drum of such a dryer.

Method and apparatus for making asphalt concrete using aggregate material from a plurality of material streams

A combination of components is provided for use in making asphalt concrete from a plurality of aggregate material streams. The combination includes an indirect dryer for heating aggregate material from a first material stream without directly exposing said first stream material to hot gases of combustion. The combination also includes a mixer for mixing aggregate material from the first material stream, aggregate material that has not been heated in the indirect dryer from a second material stream, and a binder component to produce asphalt concrete.

Method and apparatus for pelletizing blends of biomass materials for use as fuel

An assembly for processing green biomass materials from two separate feed sources for use as a fuel pellet includes a drying assembly, a torrefaction assembly and a heating assembly. The drying assembly is adapted to convert the green biomass material obtained from a first source to white biomass material. The torrefaction assembly is adapted to convert green biomass material obtained from a second source to torrefied biomass material. The heating assembly provides heat for both the drying assembly and the torrefaction assembly.

Method And Apparatus For Processing Biomass Material

An assembly for processing green biomass material for pelletizing into a fuel pellet includes a heating assembly, a drying assembly and a cooling assembly. The heating assembly heats a thermal fluid to a temperature within the range of 200° F. to 550° F. The drying assembly includes a rotating dryer drum that has a plurality of thermal fluid tubes therein. Material that is dried in the dryer drum is conveyed to a rotating cooling drum that has a cooling tube extending along the interior thereof. A nozzle is mounted on the end of the cooling tube to discharge cooling fluid on the material therein, and a plurality of flights are mounted on the interior of the cooling drum and arranged to direct material from the inlet to the discharge outlet as the cooling drum is rotated. 1. An assembly for processing biomass material for pelletizing into a pellet , said assembly comprising: (1) a burner;', '(2) a heat exchanger having a plurality of heat transfer coils therein;', '(3) a combustion chamber that is operatively connected between the burner and the heat exchanger so that the burner may be operated to heat a thermal fluid in the heat transfer coils to a temperature within the range of 200° F. to 550° F.;, '(A) a heating assembly comprising [ (a) an upper end;', '(b) a lower end;, '(1) a dryer frame having, (a) an upper end having an inlet;', '(b) a lower end having a discharge outlet;', '(c) a plurality of thermal fluid, tubes extending along the interior thereof;, '(2) a generally cylindrical dryer drum that is mounted on the dryer frame for rotation about the axis of the dryer drum, said dryer drum having, '(3) means for rotating the dryer drum with respect to the dryer frame;', '(4) means for conveying the thermal fluid from the heat exchanger of the heating assembly through the thermal fluid tubes in the dryer drum;, '(B) a drying assembly comprising (1) a cooler frame;', (a) an inlet end with an inlet;', '(b) an outlet end with a discharge outlet;', '(c) a cooling ...

Method And Apparatus For Pelletizing Blends Of Biomass Materials For Use As Fuel

An assembly for processing green biomass materials from two separate feed sources for use as a fuel pellet includes a drying assembly, a torrefaction assembly and a heating assembly. The drying assembly is adapted to convert the green biomass material obtained from a first source to white biomass material. The torrefaction assembly is adapted to convert green biomass material obtained from a second source to torrefied biomass material. The heating assembly provides heat for both the drying assembly and the torrefaction assembly. 1. An assembly for processing green biomass materials from two separate feed sources for use as a fuel pellet , said assembly comprising:(A) a drying assembly for converting green biomass material from a first source to white biomass material;(B) a torrefaction assembly for converting green biomass material from a second source to torrefied biomass material; (1) a heat exchanger having a plurality of heat transfer coils therein containing a thermal fluid;', '(2) a burner for heating the thermal fluid in the heat transfer coils to a temperature within the range of 200° F. to 550° F., said burner also producing flue gases;', '(3) means for conveying heated thermal fluid from the heat exchanger to the drying assembly;', '(4) means for conveying heated thermal fluid from the heat exchanger to the torrefaction assembly., '(C) a heating assembly comprising2. The assembly of which includes:(A) a pellet press for pelletizing a blend of biomass materials processed in the drying assembly and biomass materials processed in the torrefaction assembly;(B) a VOC duct for conveying gases collected at or downstream from the pellet press to the combustion chamber.3. The assembly of :(A) which includes a predryer that is adapted to receive green biomass material from a feed source and remove moisture from and raise the temperature of the green biomass material to produce a pre-dried biomass material;(B) wherein the heating assembly includes an exhaust stack ...

Method and apparatus for making asphalt concrete using aggregate material from a plurality of material streams

A combination of components is provided for use in making asphalt concrete from a plurality of aggregate material streams. The combination includes an indirect dryer for heating aggregate material from a first material stream without directly exposing said first stream material to hot gases of combustion. The combination also includes a mixer for mixing aggregate material from the first material stream, aggregate material that has not been heated in the indirect dryer from a second material stream, and a binder component to produce asphalt concrete.

APPARATUS AND METHOD FOR AN ASPHALT MIX TEMPERATURE CONTROL SYSTEM

A control system for controlling the temperature of the asphalt mix comprising a recycled asphalt pavement source that is adapted to provide an amount of recycled asphalt pavement, a recycled asphalt pavement sensor that is adapted to determine an amount of RAP moisture contained in the amount of recycled asphalt pavement, a liquid asphalt cement source that is adapted to provide an amount of liquid asphalt cement, a liquid asphalt cement meter that is adapted to determine the amount of liquid asphalt cement provided by the liquid asphalt cement source, a burner assembly having a variable firing rate, a dryer, and a controller that is adapted to communicate with the recycled asphalt pavement source, the recycled asphalt pavement sensor, the liquid asphalt cement source, the liquid asphalt cement meter, and the burner assembly. The controller automatically controls the variable firing rate of the burner assembly. 1. A control system for controlling the temperature of an asphalt mix , said control system comprising:(a) a recycled asphalt pavement source, said recycled asphalt pavement source being adapted to provide an amount of recycled asphalt pavement to the asphalt mix;(b) a recycled asphalt pavement sensor, said recycled asphalt pavement sensor being adapted to determine an amount of RAP moisture contained in the amount of recycled asphalt pavement;(c) a liquid asphalt cement source, said liquid asphalt cement source being adapted to provide an amount of liquid asphalt cement to the asphalt mix;(d) a liquid asphalt cement meter, said liquid asphalt cement meter being adapted to determine the amount of liquid asphalt cement provided by the liquid asphalt cement source to the asphalt mix;(e) a burner assembly, said burner assembly having a variable firing rate;(f) a dryer, said dryer being disposed adjacent the burner assembly;(g) a controller, said controller being adapted to communicate with the recycled asphalt pavement source, the recycled asphalt pavement ...

APPARATUS AND METHOD FOR A CONCRETE PLANT

A concrete plant comprising an aggregate feed bin adapted to hold and release aggregate materials, a feed conveyor adapted to receive the aggregate materials from the aggregate feed bin, a collecting belt conveyor adapted to receive the aggregate materials from the feed conveyor, a silo assembly adapted to hold and release components of concrete, a screw conveyor adapted to receive the components of concrete from the silo assembly and convey the components of concrete to the collecting belt conveyor, and a mixer adapted to receive the aggregate materials and components of concrete from the collecting belt conveyor and mix the aggregate materials and components of concrete with water. The amount of aggregate materials received by the collecting belt conveyor from the conveyor and the amount of concrete components received by the collecting belt conveyor from the conveyor are precisely and accurately controlled. 1. A method for continuously controlling component amounts in a concrete mixture , said method comprising: (1) one or more aggregate feed bins, said one or more aggregate feed bins being adapted to hold and release aggregate materials;', '(2) one or more feed conveyors, said one or more feed conveyors being adapted to receive an amount of the aggregate materials from the one or more aggregate feed bins;', '(3) a collecting belt conveyor, said collecting conveyor being adapted to receive an amount of the aggregate materials from the one or more feed conveyors;', '(4) one or more silo assemblies, said silo assemblies being adapted to hold and release components of concrete;', '(5) one or more screw conveyors, said one or more screw conveyors being adapted to receive an amount of the components of concrete from the one or more silo assemblies and convey the components of concrete to the collecting belt conveyor;', '(6) a mixer, said mixer being adapted to receive the aggregate materials and components of concrete from the collecting belt conveyor and mix the ...

Flight for Asphalt Rotary Dryer

An improved geometry for flights used in rotary drums of aggregate dryers in the manufacture of asphalt causes the aggregate to shower in an even veil across the full width of the drum under all loading conditions. An opening in the flight having a narrow bottom and wider top allows more aggregate to shower early, especially when flights are lightly loaded, on the uplift side of the drum to complete the aggregate veil and prevent hot gases from bypassing. The opening is oriented with its narrow bottom nearest the inner surface of the drum and its wider top farthest therefrom. The opening does not extend through the full height of the flight, which would form an undesired gap allowing an excessive volume of aggregate to flood out of fully loaded flights on the uplift side of rotation. Such flooding discharge causes a similar imbalance of drying to that caused by too little discharge from light loaded flights. The size and shape of the opening can be varied to adjust the amount of aggregate discharged from each flight to form the veil and to adjust the shape of the veil. 1. A dryer configured for use in an asphalt plant , the dryer comprising:a drum having an interior with an inner wall; and a proximal edge attached to the inner wall of the drum;', 'a distal edge that is spaced apart from the proximal edge; and', [ an upper line segment spaced apart from the distal edge of the flight, the upper line segment having a first end and a second end;', 'a pair of first middle line segments disposed between the upper line segment and the proximal edge of the flight, the pair of first middle line segments comprising:', 'a first left middle line segment connected to the first end of the upper line segment, wherein the first left middle line segment and the upper line segment intersect at an angle; and', 'a first right middle line segment connected to the second end of the upper line segment, wherein the first right middle line segment and the upper line segment intersect at an ...

ASPHALT PAVING MIXTURES STORAGE SILO THERMAL BARRIER SYSTEM

A storage silo apparatus having a storage silo including a shell wall, a secondary wall spaced radially outwards from the shell wall, and a space having a first width formed between an outer surface of the shell wall and an inner surface of the secondary wall. An insulation layer located in the space is narrower than the space such that an air gap is formed within the space. The air gap is formed radially adjacent the insulation layer and is configured to resist heat transfer between the shell wall and the secondary wall. 1. A storage silo apparatus comprising:a storage silo having a shell wall having a height;a secondary wall spaced radially outwards from the shell wall and surrounding the silo;a space having a first width formed between an outer surface of the shell wall and an inner surface of the secondary wall; andan insulation layer disposed in the space between the secondary wall and the shell wall, the insulation layer having a second width that is smaller than the first width such that the difference between the first width of the space and the second width of the insulation layer forms an air gap within the space,wherein the air gap is formed radially adjacent the insulation layer and is configured to resist heat transfer between the shell wall and the secondary wall.2. The apparatus of further comprising a plurality of air dams disposed along the height of the shell wall that divide the air gap into a plurality of separate enclosed air gap segments that are concentrically aligned and stacked on one another with an air gap located between them claim 1 , wherein the air dams are configured to disrupt airflow in the space traveling along the height of the shell wall from one air gap segment to an adjacent air gap segment.3. The apparatus of wherein the air dams are formed using insulation.4. The apparatus of further comprising a plurality of supports disposed in the air gap and having an end configured to contact the insulation layer in order to maintain the ...

APPARATUS AND METHOD FOR TUBE DRYER

A dryer having an inlet end, a discharge end, an exterior shell, a discharge end manifold and an inlet end manifold. The preferred dryer also comprises a primary tube adapted to convey heat transfer oil to and from the dryer, a discharge end secondary tube which is in fluid communication with the primary tube and the discharge end manifold, and an inlet end secondary tube which is in fluid communication with the inlet end manifold. The preferred dryer further comprises a plurality of tertiary tubes which are in fluid communication with the discharge end manifold and the inlet end manifold, a heat source that is adapted to heat the heat transfer oil, and a sweep gas assembly. The preferred method comprises providing such a dryer, introducing heat transfer oil into the dryer, introducing wood materials into the dryer and drying the wood materials. 2. The dryer of further comprising a rotating mechanism.3. The dryer of wherein the rotating mechanism comprises a sprocket and saddle chain drive.4. The dryer of wherein the rotating mechanism comprises a ring and a trunnion.5. The dryer of wherein the temperature of the heat transfer oil is between approximately 300° F. and approximately 550° F.6. The dryer of wherein the pressure of the heat transfer oil is between approximately 30 psi and 40 psi.7. The dryer of wherein the dryer is adapted to torrefy wood materials.8. The dryer of further comprising a rotary union valve.9. The dryer of wherein the dryer is adapted to perform parallel flow and counterflow operations.10. The dryer of wherein the discharge end manifold comprises a floating manifold adapted to allow the inlet end secondary tube claim 1 , the discharge end secondary tube claim 1 , and the plurality of tertiary tubes to expand and contract.11. The dryer of wherein the sweep gas assembly comprises a steam vent.12. The dryer of wherein the sweep gas assembly comprises a volatile organic compound vent.13. The dryer of wherein the primary tube and a portion of the ...

Method and apparatus for processing biomass material

An assembly for processing green biomass material for pelletizing into a fuel, pellet includes a heating assembly, a drying assembly and a cooling assembly. The heating assembly heats a thermal fluid to a temperature within the range of 200° F to 550° F. The drying assembly includes a rotating dryer drum that has a plurality of thermal fluid tubes therein. Material that is dried in the dryer drum is conveyed to a rotating cooling drum that has a cooling tube extending along the interior thereof. A nozzle is mounted on the end of the cooling tube to discharge cooling fluid on the material therein, and a plurality of flights are mounted on the interior of the cooling drum and arranged to direct material from the inlet to the discharge outlet as the cooling drum is rotated.

Method and apparatus for processing biomass material

An assembly for processing green biomass material for pelletizing into a fuel pellet includes a heating assembly, a drying assembly and a cooling assembly. The heating assembly heats a thermal fluid to a temperature within the range of 200° F. to 550° F. The drying assembly includes a rotating dryer drum that has a plurality of thermal fluid tubes therein. Material that is dried in the dryer drum is conveyed to a rotating cooling drum that has a cooling tube extending along the interior thereof. A nozzle is mounted on the end of the cooling tube to discharge cooling fluid on the material therein, and a plurality of flights are mounted on the interior of the cooling drum and arranged to direct material from the inlet to the discharge outlet as the cooling drum is rotated.

Coal burner assembly

A burner assembly including a housing having an air inlet, a burner end having an opening, a longitudinal axis extending generally from the air inlet toward the burner end, a motor, an impeller mounted in the housing and being in fluid communication with the air inlet, operatively connected to the motor and adapted to direct air from the air inlet toward the burner end, a coal tube adapted to convey coal toward the burner end, a coal inlet adapted to convey coal to the coal tube, a first bluff body ring, a second bluff body ring and a third bluff body ring mounted at the burner end, a flame bridge disposed between the first bluff body ring and the second bluff body ring, and an igniter mounted in the burner end and being adapted to ignite the air and fuel mixture in the burner end to produce a main flame.

Bulk material unloading system

A bulk material storage container assembly for storing and unloading particulate material includes a storage vessel adapted to hold particulate material. A discharge port is in fluid communication with the storage vessel and with a discharge port outlet. The discharge port is also sized and shaped to facilitate bridging of particulate material. A shaft is mounted within the storage vessel adjacent to the discharge port and adapted for reciprocal movement with respect to the discharge port. A rake is mounted on said shaft and adapted to disaggregate particulate material that has bridged proximate the discharge port as the shaft is reciprocated with respect to the discharge port.

Dryer drum coater having recirculation chamber for voc/nox reduction

A dryer drum coater (110, 310) has an internal recirculation cylinder (200, 400) for promoting the recirculation of combustion products so as to entrain and incinerate blue smoke formed when heated and dried virgin aggregate is mixed with other asphaltic products such as RAP and/or liquid asphalt in the dryer drum coater. The recirculation cylinder (200, 400) acts to extend and strengthen natural eddy currents formed during operation of the coater such that combustion product recirculation which would normally extend only in the end area of the flame extends far enough toward the base of the flame to entrain the blue smoke and to draw the blue smoke into the base area of the flame. The cylinder may comprise a refractory lined stainless steel shell (204) or may be formed from tee flights (402) of the type used in the combustion zones of dryer drum coaters.

Rotary drum dryer having internal flights.

On décrit un sécheur à tambour rotatif (10) utile pour produire une composition de revêtement à base d'asphalte. Le tambour (12) comporte un brûleur (26), qui définit une zone de combustion, et contient une enceinte (30) et des volets (34) nouveaux, volets qui entourent la zone de combustion. L'enceinte (30) est conçue pour retenir, en élevant son niveau, l'agrégat qui s'écoule au travers du tambour rotatif (12) de manière que les volets (34) passent au travers de cet agrégat dans le bas du tambour et en collectent une partie à leur surface supérieure et la transportent jusqu'à un point élevé (P) ou elle s'évacue et retombe au fond du tambour. Les volets (34) permettent de protéger la paroi métallique (14) du tambour (12) contre l'énergie calorifique rayonnée par la flamme du brûleur (F) - faute de quoi cette paroi se détériorerait rapidement - et ils permettent aussi d'exposer l'agrégat efficacement à cette chaleur rayonnée. Transférer plus d'énergie calorifique rayonnée à l'agrégat permet d'abaisser encore la température régnant sur la paroi métallique (14) du tambour (12). De plus, faire passer les volets (34) au travers de l'agrégat qui les recouvre ainsi sur une partie substantielle de leur rotation, permet de les exposer à une énergie calorifique rayonnée qui est moindre et les détériore donc moins. A rotary drum dryer (10) useful for producing an asphalt based paving composition is described. The drum (12) has a burner (26), which defines a combustion zone, and contains an enclosure (30) and new flaps (34), which flaps surround the combustion zone. The enclosure (30) is designed to retain and raise the level of aggregate flowing through the rotating drum (12) so that the flaps (34) pass through this aggregate into the bottom of the drum and collect part of it at their upper surface and transport it to a high point (P) where it is evacuated and falls back to the bottom of the drum. The flaps (34) make it ...

Bulk material unloading system

Coal burner assembly

A burner assembly including a housing having an air inlet, a burner end having an opening, a longitudinal axis extending generally from the air inlet toward the burner end, a motor, an impeller mounted in the housing and being in fluid communication with the air inlet, operatively connected to the motor and adapted to direct air from the air inlet toward the burner end, a coal tube adapted to convey coal toward the burner end, a coal inlet adapted to convey coal to the coal tube, a first bluff body ring, a second bluff body ring and a third bluff body ring mounted at the burner end, a flame bridge disposed between the first bluff body ring and the second bluff body ring, and an igniter mounted in the burner end and being adapted to ignite the air and fuel mixture in the burner end to produce a main flame.

Bulk material unloading system

A bulk material storage container assembly for storing and unloading particulate material includes a storage vessel adapted to hold particulate material. A discharge port is in fluid communication with the storage vessel and with a discharge port outlet. The discharge port is also sized and shaped to facilitate bridging of particulate material. A shaft is mounted within the storage vessel adjacent to the discharge port and adapted for reciprocal movement with respect to the discharge port. A rake is mounted on said shaft and adapted to disaggregate particulate material that has bridged proximate the discharge port as the shaft is reciprocated with respect to the discharge port.

Method and apparatus for pelletizing blends of biomass materials for use as fuel

Method and apparatus for pelletizing blends of biomass materials for use as fuel

An assembly for processing green biomass materials from two separate feed sources for use as a fuel pellet includes a drying assembly, a torrefaction assembly and a heating assembly. The drying assembly is adapted to convert the green biomass material obtained from a first source to white biomass material. The torrefaction assembly is adapted to convert green biomass material obtained from a second source to torrefied biomass material. The heating assembly provides heat for both the drying assembly and the torrefaction assembly.

Apparatus and method for dryer performance optimization system

A dryer performance optimization system comprising a dryer having an inner wall and being adapted to rotate at variable speeds and a variable frequency drive being adapted to vary the rotational speed of the dryer. The preferred system also comprises a baghouse having an inlet end being adapted to receive exhaust gas from the dryer and an outlet end and a controller being adapted to control the temperature of the exhaust gas from the dryer. A method for controlling the temperature of exhaust gas in a baghouse comprising providing a dryer performance optimization system as described herein and varying the temperature of the exhaust gas from the dryer by varying the rotational speed of the dryer.

Método y aparato para transformar en pastillas combinaciones de materiales de biomasa para su uso como combustible

Flight for asphalt rotary dryer

An improved geometry for flights used in rotary drums of aggregate dryers in the manufacture of asphalt causes the aggregate to shower in an even veil across the full width of the drum under all loading conditions. An opening in the flight having a narrow bottom and wider top allows more aggregate to shower early, especially when flights are lightly loaded, on the uplift side of the drum to complete the aggregate veil and prevent hot gases from bypassing. The opening is oriented with its narrow bottom nearest the inner surface of the drum and its wider top farthest therefrom. The opening does not extend through the full height of the flight, which would form an undesired gap allowing an excessive volume of aggregate to flood out of fully loaded flights on the uplift side of rotation. Such flooding discharge causes a similar imbalance of drying to that caused by too little discharge from light loaded flights. The size and shape of the opening can be varied to adjust the amount of aggregate discharged from each flight to form the veil and to adjust the shape of the veil.