# US 10,501,696 B2 · Rotating and movable bed gasifier producing high carbon char

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,501,696 B2
- Document ID: US10501696B2
- Status: Granted
- Kind: B2
- Application number: 15/521,187
- Filed: 2014-10-23
- Published: 2017-12-07
- Granted: 2019-12-10
- Earliest claimed: 2014-10-23
- Applicants: Randall J. Thiessen; La Voy M. Thiessen, Jr.
- Inventors: Randall J. Thiessen; La Voy M. Thiessen, Jr.
- Web page: https://patentgrep.com/patent/US10501696B2

## CPC

- C10J 3/32: Devices for distributing fuel evenly over the bed or for stirring up the fuel bed
- C10J 3/26: downwardly
- C10J 3/42: Rotary grates
- C10J 3/723: {Controlling or regulating the gasification process}
- F23G 5/0276: {using direct heating}
- F23G 5/26: having rotating bottom
- F23G 7/10: of field or garden waste {or biomasses}
- C10J 2200/09: Mechanical details of gasifiers not otherwise provided for, e.g. sealing means
- C10J 2300/0916: Biomass
- C10J 2300/0956: Air or oxygen enriched air
- C10J 2300/165: integrated with a gas turbine or gas motor
- C10J 2300/1653: integrated in a gasification combined cycle [IGCC]
- C10J 2300/1675: making use of a steam turbine
- C10J 2300/1807: Recycle loops, e.g. gas, solids, heating medium, water
- F23G 2206/202: with an internal combustion engine
- F23G 2206/203: with a power/heat generating installation
- Y02E 20/12: Heat utilisation in combustion or incineration of waste
- Y02E 20/18: Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
- C10J: PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES (synthesis gas from liquid or gaseous hydrocarbons C01B; underground gasification of minerals E21B43/295); CARBURETTING AIR OR OTHER GASES
- F23G: CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention includes a gasifier for gasifying fuels having a container with a top, sidewalls and a bottom for facilitating the gasifying process. One or more open vertical shafts extend downward inside the container for allowing a downdraft or updraft of air and fuel for the gasifying process. A rotating bed is preferably included inside the container and below the one or more shafts for receiving the fuel. The bed rotates essentially perpendicular to the shaft to facilitate even heating and gasifying of the fuel. The bed is further movable relative to the vertical shaft in order to increase or decrease the volume of fuel flow to the fuel.

## Claims

### Claim 1

A method of gasifying biomass fuel comprising:
selecting a fuel;
inserting the fuel through a fire tube and onto a bed of a gasifier, the bed having sidewalls extending therefrom;
adjusting a gap formed between the fire tube and sidewalls to provide fuel flow for optimal gasification based on the fuel selected;
adjusting the height of the fire tube relative to the sidewalls to achieve a preferred fuel consumption rate with a leg mounted to an elevator built into and located at least partially below a floor of the bed;
supplying heat and air to the fuel;
stirring the fuel to promote uniform gasification of the fuel; and
adjusting the gap to provide consistent fuel flow as the fuel is gasified.

### Claim 2 (depends on 1)

The method of claim 1 wherein the stirring of the fuel is by rotating the bed which is supporting the fuel.

### Claim 3 (depends on 2)

The method of claim 2 wherein the bed rotation is about ¼ revolution per minute.

### Claim 4 (depends on 1)

The method of claim 1 further comprising recycling fuel into the fire tube.

### Claim 5 (depends on 1)

The method of claim 1 wherein the gap is adjusted by raising or lowering the bed.

### Claim 6 (depends on 1)

The method of claim 1 wherein the gap is adjusted by raising or lowering the fire tube.

### Claim 7 (depends on 1)

The method of claim 1 further comprising forming char.

### Claim 8 (depends on 7)

The method of claim 7 wherein said char has a carbon content of at least 50 wt. %.

### Claim 9 (depends on 7)

The method of claim 7 wherein said char has a carbon content of at least 60 wt. %.

### Claim 10 (depends on 7)

The method of claim 7 wherein said char comprises carbon, hydrogen, and nitrogen.

### Claim 11 (depends on 7)

The method of claim 7 wherein said char has an amount of ash by total weight of between 2 wt. % and 20 wt. %.

### Claim 12 (depends on 7)

The method of claim 7 wherein said char has an amount of ash by total weight of between 4 wt. % and 15 wt. %.

### Claim 13 (depends on 7)

The method of claim 7 wherein said char has an amount of ash by total weight of between 7 wt. % and 10 wt. %.

### Claim 14 (depends on 7)

The method of claim 7 wherein said char has an amount of moisture by total weight of between 1 wt. % and 15 wt. %.

### Claim 15 (depends on 7)

The method of claim 7 wherein said char has an amount of moisture by total weight of between 2 wt. % and 12 wt. %.

### Claim 16 (depends on 7)

The method of claim 7 wherein said char has an amount of moisture by total weight of between 4 wt. % and 9 wt. %.

### Claim 17 (depends on 7)

The method of claim 7 wherein said char has an amount of volatile matter by total weight of between 2 wt. % and 25 wt. %.

### Claim 18 (depends on 7)

The method of claim 7 wherein said char has an amount of volatile matter by total weight of between 4 wt. % and 20 wt. %.

### Claim 19 (depends on 7)

The method of claim 7 wherein said char has an amount of volatile matter by total weight of between 7 wt. % and 15 wt. %.

### Claim 20 (depends on 1)

The method of claim 1 wherein the fuel consists essentially of 20% synthetic fuel and 80% biomass fuel.

### Claim 21 (depends on 11)

The method of claim 11 further comprising pyrolyzing the fuel to produce a synthetic gas.