US20170283704A1 - Portable biochar kiln - Google Patents
Portable biochar kiln Download PDFInfo
- Publication number
- US20170283704A1 US20170283704A1 US15/453,601 US201715453601A US2017283704A1 US 20170283704 A1 US20170283704 A1 US 20170283704A1 US 201715453601 A US201715453601 A US 201715453601A US 2017283704 A1 US2017283704 A1 US 2017283704A1
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- US
- United States
- Prior art keywords
- kiln
- lid
- ridge
- portable biochar
- biochar kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B1/00—Retorts
- C10B1/02—Stationary retorts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
- F23G5/0276—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage using direct heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/40—Portable or mobile incinerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
- F23L1/02—Passages or apertures for delivering primary air for combustion by discharging the air below the fire
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/26—Biowaste
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Definitions
- Biochar is made from biomass (trees, agricultural waste, etc.) in an oxygen deprived, high temperature environment. Quality biochar has high purity, absorptivity and cation exchange capacity. This can provide significant benefits to several large markets including agriculture, pollution remediation, odor sequestration, separation of gases, oil and gas clean up, and more.
- FIG. 1 is a perspective view of an example portable biochar kiln.
- FIGS. 2-3 illustrate lifting and moving the example portable biochar kiln shown in FIG. 1 .
- FIGS. 4-5 illustrate removing a lid from the example portable biochar kiln.
- FIGS. 6-7 are perspective views of an example lid of the portable biochar kiln.
- FIGS. 8-10 illustrate replacing the lid from the example portable biochar kiln.
- FIGS. 11-12 illustrate covering an opening in the lid for a stack assembly.
- FIGS. 13-17 illustrate transporting the lid of the example portable biochar kiln.
- FIG. 18 illustrates assembling the lid and stack assembly on the portable biochar kiln.
- a biochar kiln and system including construction of the kiln and various subsystems such as, but not limited to, ventilation, stack, control, insulation, and ember suppression.
- the kiln may be implemented to produce biochar.
- the biochar kiln is configured to support slow pyrolysis and can accommodate a number of variables. Variables include, but are not limited to, a “green” and/or dry feedstock, large and/or small pieces of the feedstock, various and multiple different species of the feedstock, and operation according to variable processing times.
- the biochar kiln is robust in that it may be operated under a number of variable operating conditions, while still producing a consistent and high quality biochar product.
- An example portable biochar kiln includes a body having a one-piece rolled wall, a curved floor attached to a sidewall.
- the example portable biochar kiln also includes a ridge around an outside perimeter of the body. The ridge is configured for engagement with a gripper attachment for heavy machinery to raise and lower the body.
- the example portable biochar kiln also includes a removable lid. An edge is provided around an outside perimeter of the removable lid. The edge is configured for engagement with the same gripper attachment for heavy machinery to cover and uncover the lid on the body.
- An example of a portable biochar kiln system includes a kiln body.
- a ridge is provided around an outside perimeter of the kiln body.
- a removable lid is provided to cover and uncover an opening in the top of the kiln body.
- An edge is provided around an outside perimeter of the removable lid.
- the example portable biochar kiln system also includes a gripper attachment for heavy machinery.
- the gripper attachment is configured for engagement with the ridge to raise and lower the kiln body.
- the gripper attachment is also configured for engagement with the edge of the lid to cover and uncover the kiln body.
- the kiln has a removable lid to permit easy loading of feedstock and unloading of biochar.
- the kiln may also have removable stacks and a stack hole sealing mechanism.
- the kiln is transportable and can travel to workstations, instead of making the workstations travel to the kilns.
- the terms “includes” and “including” mean, but is not limited to, “includes” or “including” and “includes at least” or “including at least.”
- the term “based on” means “based on” and “based at least in part on.”
- FIG. 1 is a perspective view of an example biochar kiln 10 .
- the biochar kiln 10 may include a main body portion 12 and a lid 14 .
- the main body portion 12 is configured to receive a feedstock (not shown) by removing the lid 14 and loading the feedstock before replacing the lid 14 .
- the biochar kiln further includes a base portion 16 .
- the base portion 16 may be configured such that it is raised off of the ground. This enables airflow under the main body portion 12 .
- a ring 18 may also be implemented to lift the biochar kiln 10 , e.g., using a loader tractor, forklift or other suitable machinery.
- the kiln wall 20 may be made of a one-piece, rolled wall.
- Body welds, where needed are made on curved surfaces to lower structural and thermal stress to those joints.
- the floor 24 may also be a one-piece heavy gauge, high strength steel.
- the floor 24 may be downward elliptical-shaped (the shape being visible in FIG. 1 and FIG. 5 ) to withstand heavy falling wood chunks during filling.
- the surface of the floor 24 is curved and has only one weld joint along the perimeter where it joins with the wall 20 .
- a multi-legged stand 16 with circular base 18 may be attached (e.g., welded) to the kiln body 12 , which travels with the kiln body 12 as it is being transported.
- FIGS. 2-3 illustrate lifting and moving the example portable biochar kiln 10 shown in FIG. 1 .
- the kiln body 12 may include a ridge.
- the ridge 24 may be provided as a heavy gauge, rolled gripper angle iron is provided on the outside perimeter of the body, e.g., around the walls 20 .
- the ridge 24 may be substantially L-shaped, such that one leg of the L is mounted (e.g., welded or otherwise) to the wall 20 and the other leg of the L provides a lip.
- other configurations are also contemplated, such as a T-shape or other shape ridge that provides the lip around all or a portion of the perimeter of the wall 20 .
- the ridge 24 provides an interface for grasping with a heavy machinery arm.
- the heavy machinery may include a forklift.
- Other machinery stationary or mobile may also be provided to raise and lower the kiln, e.g., for transport.
- a front-end loader 1 is implemented to raise and lower the kiln 10 .
- the front-end loader 1 is shown as it may be specially configured with a gripper attachment 26 .
- the gripper attachment 26 may be attached to the front-end or “wheel” loader 1 where a bucket or other tooling may typically be installed, e.g., at the ends of arms 2 .
- the gripper attaches to the wheel loader using a JRB style quick attach interface which is standard or a factory option on many brands of wheel loaders.
- Movement of the arms 2 enables raising, lowering, and tilting of the gripper attachment 26 , and as such, anything grasped by the gripper attachment 26 , such as the kiln 10 .
- the gripper attachment 26 is configured as a pincher. That is, the gripper attachment has two arms 28 a - b pivotally mounted to the gripper attachment such that the arms 28 a - b can be opened (or loosened) and closed (or tightened).
- a hydraulic rotor motor (not shown) is provided for the gripper attachment 26 .
- the hydraulic rotor motor may be mounted to the gripper attachment 26 , and wired into the cab of the front-end loader 1 so that it can be controlled by the operator/driver.
- the hydraulic rotor motor may be provided to open and close the arms 28 a - b and/or rotate the arms 28 a - b.
- the hydralic rotor motor may enable to the gripper attachment 26 to operate as a pincher.
- the hydraulic rotor motor may also enables a wheel loader to raise a kiln over a hopper and then dump its load (e.g., like a can of spaghetti into a saucepan). The dumping operation takes less than a minute during which the kiln remains attached to the wheel loader.
- hydraulic rotor motor may be implemented for both rotation and pincher operation, or a separate motor(s) can be provided.
- the front-end loader 1 may approach the kiln 10 as shown in FIG. 2 .
- the gripper attachment 26 may be raised off of the ground at about the same height as the ridge 24 .
- a channel 30 formed in each of the arms 28 a - b may be slid onto the ridge 24 .
- the arms 28 a - b of the gripper attachment 26 may be closed against the ridge 24 to secure the kiln body 12 within the gripper attachment. It is noted that the structure of the ridge 24 may assist in preventing damage to the kiln wall 20 , e.g., by providing additional support at the point(s) of engagement between the arms 28 a - b and the kiln 10 .
- the arms 2 of the front-end loader 1 may be raised and/or tilted, depending on the desired operations, e.g., as shown in FIG. 3 .
- the front-end loader 1 may be used to transport the kiln 10 to any desired location. By tilting the gripper attachment 26 , contents can be emptied from the kiln 10 .
- FIGS. 4-5 illustrate removing a lid from the example portable biochar kiln.
- the lid 14 of the kiln 10 may include an edge 32 .
- the edge 32 may be provided as a heavy gauge, rolled gripper angle iron is provided on the outside perimeter of the lid 14 .
- the edge 32 may be substantially L-shaped, such that one leg of the L is mounted (e.g., welded or otherwise) to the lid 14 and the other leg of the L provides a lip.
- other configurations are also contemplated, such as a T-shape or other shape ridge that provides the lip around all or a portion of the perimeter of the lid 14
- the edge 32 provides an interface for grasping the lid 14 with a heavy machinery arm.
- the heavy machinery may include a forklift or other machinery (stationary or mobile).
- the front-end loader 1 is implemented to raise and lower and thus attach and detach lid 14 from the kiln 10 .
- the front-end loader 1 is shown as it may be specially configured with the same gripper attachment 26 described above for FIGS. 2-3 .
- the front-end loader 1 may approach the lid 14 of kiln 10 .
- the gripper attachment 26 may be raised off of the ground at about the same height as the edge 32 .
- a channel 30 formed in each of the arms 28 a - b of the gripper attachment 26 may be slid onto the edge 32 .
- the arms 28 a - b of the gripper attachment 26 may be closed against the edge 32 to secure the lid 14 within the gripper attachment. It is noted that the structure of the edge 32 may assist in preventing damage to the lid 14 , e.g., by providing additional support at the point(s) of engagement between the arms 28 a - b and the lid 14 .
- the arms 2 of the front-end loader 1 may be raised and/or tilted, depending on the desired operations, e.g., as shown in FIG. 4 .
- the front-end loader 1 may be used to cover and uncover the kiln 10 , and to transport the lid 14 to any desired location.
- FIG. 5 shows the inside of the kiln 10 after the lid has been removed. By tilting the gripper attachment 26 , the ash, snow or debris can be removed from the lid 14 .
- FIGS. 6-7 are perspective views of an example lid 14 of the portable biochar kiln 10 .
- the lid 14 is shaped similar to the kiln floor 22 .
- the lid 14 is a one-piece elliptical or curved heavy gauge, high strength steal.
- the lid 14 may anneal with use (e.g., it gets stronger over time).
- a diameter of the edge 32 of the lid forms a lip which is about two inches greater than the outer perimeter of the kiln wall 20 . As such the edge 32 of can sit on the kiln's top rim without falling in.
- the outer rim 34 of the lid 14 may seat within an inner perimeter of the kiln wall 20 .
- the outer rim 34 may be larger than the kiln wall 20 such that the outer rim 34 sits on top of the kiln wall 20 .
- a gasket (not shown) may be provided between the lid 14 and the kiln wall 20 .
- a circular, downward flange is installed under the lid to block condensed creosote from migrating to the lid's lip (it drips down onto the wood for reprocessing). If the creosote was allowed to migrate to the lip, it would make a hard, uneven interface with the seating angle iron. The resulting gaps would result in difficult to manage air leaks.
- FIGS. 8-10 illustrate replacing the lid from the example portable biochar kiln.
- the front-end loader 1 carrying the lid 14 may approach the kiln 10 as shown in FIG. 8 .
- the gripper attachment 26 may be raised off of the ground at about the same height or slightly higher than the top rim of the kiln 10 . As the front-end loader moves toward the kiln 10 .
- the arms 28 a - b of the gripper attachment 26 may lower the lid 14 onto the kiln 10 .
- the gripper attachment 26 may release from the edge 32 to release the lid 14 on top of the kiln 10 , as shown in FIG. 10 .
- FIGS. 11-12 illustrate covering an opening 38 in the lid 14 for a stack assembly (see, e.g., stack 15 in FIGS. 1 and 18 ).
- a stack assembly see, e.g., stack 15 in FIGS. 1 and 18 .
- the stack 15 is removed from the lid 14 and a gasket cover 36 is positioned to seal the opening 38 in the kiln lid 14 .
- the cover 36 may be positioned manually by an operator, or using the gripper attachment 26 or other machinery.
- FIGS. 13-17 illustrate transporting the lid 14 of the example portable biochar kiln 10 .
- FIG. 18 illustrates assembling the lid 14 and stack assembly 15 on the portable biochar kiln 10 .
- the mini-gripper 26 ′ permits use of smaller-weight machinery (e.g., front-end loader 1 ′) which can result in cost savings (e.g., 60% to 70% over the cost of larger loaders 1 ).
- the mini-gripper 26 ′ can be readily mounted to smaller machinery such as skid-steer-type of equipment.
- the front-end loader 1 ′ is shown as it may approach the lid 14 (e.g., in this case the lid 14 is laying on the ground).
- the gripper attachment 26 ′ may be at about the same height as the edge 32 of the lid 14 .
- a channel 30 ′ formed in each of the arms 28 a ′- b ′ of the gripper attachment 26 ′ may be slid onto the edge 32 .
- the arms 28 a ′- b ′ of the gripper attachment 26 ′ may be closed against the edge 32 to secure the lid 14 within the gripper attachment 26 ′.
- the arms of the front-end loader 1 ′ may be raised, as shown in FIGS. 15-16 .
- the front-end loader 1 may be used to transport the lid 14 (as shown in FIG. 17 ) to any desired location, such as to a kiln 10 shown in FIG. 18 .
- the gripper 26 ′ may also be operated as shown in FIG. 18 to add the stack 15 on top of the lid 14 .
- the gripper 26 ′ may engage a ring 40 of the stack 15 . Operation to engage ring 40 is similar to that already described for engaging edge 32 of the lid 14 .
- the stack 15 may be assembled prior to positioning the lid 14 onto the kiln 10 . In another example, the stack 15 may be assembled after positioning the lid 14 onto the kiln 10 .
- the mini-gripper 42 also can be manufactured with less material, has a simplified arm actuator, and may have a limited rotor (e.g., for leveling only). Again, the mini-gripper 40 may include an industry-standard attachment.
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Abstract
Description
- This application claims the priority benefit of U.S. Provisional Patent Application No. 62/317,573 filed Apr. 3, 2016 for “Biochar Kiln,” hereby incorporated by reference in its entirety as though fully set forth herein.
- Biochar is made from biomass (trees, agricultural waste, etc.) in an oxygen deprived, high temperature environment. Quality biochar has high purity, absorptivity and cation exchange capacity. This can provide significant benefits to several large markets including agriculture, pollution remediation, odor sequestration, separation of gases, oil and gas clean up, and more.
-
FIG. 1 is a perspective view of an example portable biochar kiln. -
FIGS. 2-3 illustrate lifting and moving the example portable biochar kiln shown inFIG. 1 . -
FIGS. 4-5 illustrate removing a lid from the example portable biochar kiln. -
FIGS. 6-7 are perspective views of an example lid of the portable biochar kiln. -
FIGS. 8-10 illustrate replacing the lid from the example portable biochar kiln. -
FIGS. 11-12 illustrate covering an opening in the lid for a stack assembly. -
FIGS. 13-17 illustrate transporting the lid of the example portable biochar kiln. -
FIG. 18 illustrates assembling the lid and stack assembly on the portable biochar kiln. - A biochar kiln and system is disclosed, including construction of the kiln and various subsystems such as, but not limited to, ventilation, stack, control, insulation, and ember suppression. The kiln may be implemented to produce biochar.
- The biochar kiln is configured to support slow pyrolysis and can accommodate a number of variables. Variables include, but are not limited to, a “green” and/or dry feedstock, large and/or small pieces of the feedstock, various and multiple different species of the feedstock, and operation according to variable processing times. The biochar kiln is robust in that it may be operated under a number of variable operating conditions, while still producing a consistent and high quality biochar product.
- An example portable biochar kiln includes a body having a one-piece rolled wall, a curved floor attached to a sidewall. The example portable biochar kiln also includes a ridge around an outside perimeter of the body. The ridge is configured for engagement with a gripper attachment for heavy machinery to raise and lower the body. The example portable biochar kiln also includes a removable lid. An edge is provided around an outside perimeter of the removable lid. The edge is configured for engagement with the same gripper attachment for heavy machinery to cover and uncover the lid on the body.
- An example of a portable biochar kiln system includes a kiln body. A ridge is provided around an outside perimeter of the kiln body. A removable lid is provided to cover and uncover an opening in the top of the kiln body. An edge is provided around an outside perimeter of the removable lid. The example portable biochar kiln system also includes a gripper attachment for heavy machinery. The gripper attachment is configured for engagement with the ridge to raise and lower the kiln body. The gripper attachment is also configured for engagement with the edge of the lid to cover and uncover the kiln body.
- In an example, the kiln has a removable lid to permit easy loading of feedstock and unloading of biochar. The kiln may also have removable stacks and a stack hole sealing mechanism. In an example, the kiln is transportable and can travel to workstations, instead of making the workstations travel to the kilns.
- Before continuing, it is noted that as used herein, the terms “includes” and “including” mean, but is not limited to, “includes” or “including” and “includes at least” or “including at least.” The term “based on” means “based on” and “based at least in part on.”
-
FIG. 1 is a perspective view of anexample biochar kiln 10. Thebiochar kiln 10 may include amain body portion 12 and alid 14. Themain body portion 12 is configured to receive a feedstock (not shown) by removing thelid 14 and loading the feedstock before replacing thelid 14. In an example, the biochar kiln further includes abase portion 16. Thebase portion 16 may be configured such that it is raised off of the ground. This enables airflow under themain body portion 12. Aring 18 may also be implemented to lift thebiochar kiln 10, e.g., using a loader tractor, forklift or other suitable machinery. - In an example, the
kiln wall 20 may be made of a one-piece, rolled wall. Body welds, where needed (e.g., between the floor 222 andwall 20, and various ports), are made on curved surfaces to lower structural and thermal stress to those joints. - The floor 24 may also be a one-piece heavy gauge, high strength steel. The floor 24 may be downward elliptical-shaped (the shape being visible in
FIG. 1 andFIG. 5 ) to withstand heavy falling wood chunks during filling. The surface of the floor 24 is curved and has only one weld joint along the perimeter where it joins with thewall 20. In an example where the kiln floor is curved or substantially elliptical shaped and cannot balance the kiln, amulti-legged stand 16 withcircular base 18 may be attached (e.g., welded) to thekiln body 12, which travels with thekiln body 12 as it is being transported. - Before continuing, it should be noted that the examples described above are provided for purposes of illustration, and are not intended to be limiting. Other devices and/or device configurations may be utilized to carry out the operations described herein.
-
FIGS. 2-3 illustrate lifting and moving the exampleportable biochar kiln 10 shown inFIG. 1 . Thekiln body 12 may include a ridge. In an example, the ridge 24 may be provided as a heavy gauge, rolled gripper angle iron is provided on the outside perimeter of the body, e.g., around thewalls 20. The ridge 24 may be substantially L-shaped, such that one leg of the L is mounted (e.g., welded or otherwise) to thewall 20 and the other leg of the L provides a lip. However, other configurations are also contemplated, such as a T-shape or other shape ridge that provides the lip around all or a portion of the perimeter of thewall 20. - This configuration enables structural durability, and the ridge 24 provides an interface for grasping with a heavy machinery arm. In an example, the heavy machinery may include a forklift. Other machinery (stationary or mobile) may also be provided to raise and lower the kiln, e.g., for transport.
- In the example shown in
FIGS. 2-3 , a front-end loader 1 is implemented to raise and lower thekiln 10. The front-end loader 1 is shown as it may be specially configured with agripper attachment 26. - The
gripper attachment 26 may be attached to the front-end or “wheel” loader 1 where a bucket or other tooling may typically be installed, e.g., at the ends ofarms 2. The gripper attaches to the wheel loader using a JRB style quick attach interface which is standard or a factory option on many brands of wheel loaders. - Movement of the
arms 2 enables raising, lowering, and tilting of thegripper attachment 26, and as such, anything grasped by thegripper attachment 26, such as thekiln 10. - In an example, the
gripper attachment 26 is configured as a pincher. That is, the gripper attachment has two arms 28 a-b pivotally mounted to the gripper attachment such that the arms 28 a-b can be opened (or loosened) and closed (or tightened). - In an example, a hydraulic rotor motor (not shown) is provided for the
gripper attachment 26. The hydraulic rotor motor may be mounted to thegripper attachment 26, and wired into the cab of the front-end loader 1 so that it can be controlled by the operator/driver. The hydraulic rotor motor may be provided to open and close the arms 28 a-b and/or rotate the arms 28 a-b. As such, the hydralic rotor motor may enable to thegripper attachment 26 to operate as a pincher. The hydraulic rotor motor may also enables a wheel loader to raise a kiln over a hopper and then dump its load (e.g., like a can of spaghetti into a saucepan). The dumping operation takes less than a minute during which the kiln remains attached to the wheel loader. - It is noted that the same hydraulic rotor motor may be implemented for both rotation and pincher operation, or a separate motor(s) can be provided.
- During operation, the front-end loader 1 may approach the
kiln 10 as shown inFIG. 2 . Thegripper attachment 26 may be raised off of the ground at about the same height as the ridge 24. As the front-end loader moves toward thekiln 10, achannel 30 formed in each of the arms 28 a-b may be slid onto the ridge 24. - After positioning at the desired location, the arms 28 a-b of the
gripper attachment 26 may be closed against the ridge 24 to secure thekiln body 12 within the gripper attachment. It is noted that the structure of the ridge 24 may assist in preventing damage to thekiln wall 20, e.g., by providing additional support at the point(s) of engagement between the arms 28 a-b and thekiln 10. - After engaging the arms 28 a-b with the ridge 24, the
arms 2 of the front-end loader 1 may be raised and/or tilted, depending on the desired operations, e.g., as shown inFIG. 3 . As such, the front-end loader 1 may be used to transport thekiln 10 to any desired location. By tilting thegripper attachment 26, contents can be emptied from thekiln 10. - The process described above can be reversed to lower and release the
kiln 10. This will be readily understood by those having ordinary skill in the art after becoming familiar with the teachings herein, and therefore a full description is not included. -
FIGS. 4-5 illustrate removing a lid from the example portable biochar kiln. Thelid 14 of thekiln 10 may include anedge 32. In an example, theedge 32 may be provided as a heavy gauge, rolled gripper angle iron is provided on the outside perimeter of thelid 14. Theedge 32 may be substantially L-shaped, such that one leg of the L is mounted (e.g., welded or otherwise) to thelid 14 and the other leg of the L provides a lip. However, other configurations are also contemplated, such as a T-shape or other shape ridge that provides the lip around all or a portion of the perimeter of thelid 14 - This configuration enables structural durability, and the
edge 32 provides an interface for grasping thelid 14 with a heavy machinery arm. As noted above, the heavy machinery may include a forklift or other machinery (stationary or mobile). In the example shown inFIGS. 4-5 , the front-end loader 1 is implemented to raise and lower and thus attach and detachlid 14 from thekiln 10. The front-end loader 1 is shown as it may be specially configured with thesame gripper attachment 26 described above forFIGS. 2-3 . - During operation, the front-end loader 1 may approach the
lid 14 ofkiln 10. Thegripper attachment 26 may be raised off of the ground at about the same height as theedge 32. As the front-end loader moves toward thekiln 10, achannel 30 formed in each of the arms 28 a-b of thegripper attachment 26 may be slid onto theedge 32. - After positioning at the desired location, the arms 28 a-b of the
gripper attachment 26 may be closed against theedge 32 to secure thelid 14 within the gripper attachment. It is noted that the structure of theedge 32 may assist in preventing damage to thelid 14, e.g., by providing additional support at the point(s) of engagement between the arms 28 a-b and thelid 14. - After engaging the arms 28 a-b with the
edge 32, thearms 2 of the front-end loader 1 may be raised and/or tilted, depending on the desired operations, e.g., as shown inFIG. 4 . As such, the front-end loader 1 may be used to cover and uncover thekiln 10, and to transport thelid 14 to any desired location.FIG. 5 shows the inside of thekiln 10 after the lid has been removed. By tilting thegripper attachment 26, the ash, snow or debris can be removed from thelid 14. -
FIGS. 6-7 are perspective views of anexample lid 14 of theportable biochar kiln 10. Thelid 14 is shaped similar to thekiln floor 22. In an example, thelid 14 is a one-piece elliptical or curved heavy gauge, high strength steal. Thelid 14 may anneal with use (e.g., it gets stronger over time). - In an example, a diameter of the
edge 32 of the lid forms a lip which is about two inches greater than the outer perimeter of thekiln wall 20. As such theedge 32 of can sit on the kiln's top rim without falling in. In an example, theouter rim 34 of thelid 14 may seat within an inner perimeter of thekiln wall 20. In another example, theouter rim 34 may be larger than thekiln wall 20 such that theouter rim 34 sits on top of thekiln wall 20. A gasket (not shown) may be provided between thelid 14 and thekiln wall 20. - In an example, a circular, downward flange is installed under the lid to block condensed creosote from migrating to the lid's lip (it drips down onto the wood for reprocessing). If the creosote was allowed to migrate to the lip, it would make a hard, uneven interface with the seating angle iron. The resulting gaps would result in difficult to manage air leaks.
-
FIGS. 8-10 illustrate replacing the lid from the example portable biochar kiln. During operation, the front-end loader 1 carrying thelid 14, may approach thekiln 10 as shown inFIG. 8 . Thegripper attachment 26 may be raised off of the ground at about the same height or slightly higher than the top rim of thekiln 10. As the front-end loader moves toward thekiln 10. - After positioning at the desired location as shown in
FIG. 9 , the arms 28 a-b of thegripper attachment 26 may lower thelid 14 onto thekiln 10. After lower thelid 14, thegripper attachment 26 may release from theedge 32 to release thelid 14 on top of thekiln 10, as shown inFIG. 10 . -
FIGS. 11-12 illustrate covering anopening 38 in thelid 14 for a stack assembly (see, e.g., stack 15 inFIGS. 1 and 18 ). When the burn is complete, thestack 15 is removed from thelid 14 and agasket cover 36 is positioned to seal theopening 38 in thekiln lid 14. With thestack opening 38 and the bottom vent pipes sealed, the biochar embers self-extinguish due to lack of oxygen. Thecover 36 may be positioned manually by an operator, or using thegripper attachment 26 or other machinery. - It is noted that a lighter duty gripper (or “mini-gripper”) may be provided for low weight applications, such as lid and stack removal.
FIGS. 13-17 illustrate transporting thelid 14 of the exampleportable biochar kiln 10.FIG. 18 illustrates assembling thelid 14 and stackassembly 15 on theportable biochar kiln 10. - The mini-gripper 26′permits use of smaller-weight machinery (e.g., front-end loader 1′) which can result in cost savings (e.g., 60% to 70% over the cost of larger loaders 1). In an example, the mini-gripper 26′ can be readily mounted to smaller machinery such as skid-steer-type of equipment.
- In
FIG. 13 , the front-end loader 1′ is shown as it may approach the lid 14 (e.g., in this case thelid 14 is laying on the ground). Thegripper attachment 26′ may be at about the same height as theedge 32 of thelid 14. As the front-end loader moves toward thelid 14, achannel 30′ formed in each of thearms 28 a′-b′ of thegripper attachment 26′ may be slid onto theedge 32. - After positioning at the desired location, the
arms 28 a′-b′ of thegripper attachment 26′ may be closed against theedge 32 to secure thelid 14 within thegripper attachment 26′. After engaging thearms 28 a′-b′ with theedge 32, the arms of the front-end loader 1′ may be raised, as shown inFIGS. 15-16 . As such, the front-end loader 1 may be used to transport the lid 14 (as shown inFIG. 17 ) to any desired location, such as to akiln 10 shown inFIG. 18 . - The
gripper 26′ may also be operated as shown inFIG. 18 to add thestack 15 on top of thelid 14. Thegripper 26′ may engage a ring 40 of thestack 15. Operation to engage ring 40 is similar to that already described for engagingedge 32 of thelid 14. In an example, thestack 15 may be assembled prior to positioning thelid 14 onto thekiln 10. In another example, thestack 15 may be assembled after positioning thelid 14 onto thekiln 10. - The mini-gripper 42 also can be manufactured with less material, has a simplified arm actuator, and may have a limited rotor (e.g., for leveling only). Again, the mini-gripper 40 may include an industry-standard attachment.
- It is noted that the examples shown and described are provided for purposes of illustration and are not intended to be limiting. Still other examples are also contemplated.
Claims (20)
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US16/149,789 US10751885B2 (en) | 2012-02-16 | 2018-10-02 | Gripper assembly for portable biochar kiln |
US16/684,997 US11135728B2 (en) | 2012-02-16 | 2019-11-15 | Lid assembly for portable biochar kiln |
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US16/503,875 Active 2037-04-04 US10883052B2 (en) | 2016-04-03 | 2019-07-05 | Biochar kiln |
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CA2962293C (en) | 2021-05-18 |
CA2962387C (en) | 2021-05-18 |
US10385274B2 (en) | 2019-08-20 |
US10385273B2 (en) | 2019-08-20 |
US10883052B2 (en) | 2021-01-05 |
US20190330533A1 (en) | 2019-10-31 |
CA2962387A1 (en) | 2017-10-03 |
US20170283703A1 (en) | 2017-10-05 |
CA2962293A1 (en) | 2017-10-03 |
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