Method of Simultaneously Drying Coal and Torrefying Biomass

a technology of biomass torrefaction and coal drying, which is applied in the direction of biofuels, fuels, waste based fuels, etc., can solve the problems of increasing the transport cost of materials, not addressing product cooling, and process is often not as efficient, so as to improve the distribution of water added

Inactive Publication Date: 2011-12-29
BIOMASS SECURE POWER INC
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  • Abstract
  • Description
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AI Technical Summary

Benefits of technology

[0017]It is yet another aspect of the present invention to employ water sprays and a mixing device, such as a mixing screw or rotary drum, to cool the processed biomass. Hot torrefied product would be discharged directly from the reactor into the cooler and water would be sprayed onto the hot product through the use of a multiplicity of sprays to provide cooling through evaporation of water. The total amount of water added would be that to provide cooling to approx

Problems solved by technology

This moisture not only does not add to the fuel value, but also increases the transport cost of the material.
In addition, the '978 patent discloses a torrefaction residence time of 0.5 to 5.0 hours and does not disclose a specific cooling methodology.
The '331 application discloses combustion of vapors produced during torrefaction to supply the heat for torrefaction and the subsequent pelletizing of the torref

Method used

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  • Method of Simultaneously Drying Coal and Torrefying Biomass
  • Method of Simultaneously Drying Coal and Torrefying Biomass
  • Method of Simultaneously Drying Coal and Torrefying Biomass

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Embodiment Construction

[0038]Referring now to FIGS. 1 and 2, a process for preparing a coal-biomass-water slurry and drying the same is shown. In order to remove water from coal and / or biomass, drying processes have been employed that utilize fluidized bed reactors. A fluidized bed reactor is a system wherein a fluid or gas is passed through a granular solid material at high velocities to suspend the solid and cause it to behave as if it were fluid (i.e. fluidization). In one embodiment, the coal used in the process of this specification is similar to the coal having about 5 to about 30 weight percent of moisture and, more preferably about 10 to about 30 weight percent of moisture. The biomass is similar to biomass having about 10 to 50 weight percent moisture. However, in the instant case, the coal used may often contain up to about 40 weight percent of water. The moisture content of coal and / or biomass may be determined by conventional means in accordance with standard A.S.T.M. testing procedures. Metho...

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Abstract

A process for simultaneously drying coal and/or torrefying biomass is provided in which coal and/or biomass are passed into a fluidized bed reactor and heated to a predetermined temperature. The dried coal and/or biomass is then fed to a cooler where the temperature of the product is reduced to approximately 200 degrees Fahrenheit and water is added to further passivate the coal.

Description

[0001]This application is related to pending U.S. patent application Ser. No. 12 / 763,355, filed Apr. 20, 2010. This application is also related to pending U.S. patent application Ser. No. 12 / 566,174, filed Sep. 24, 2009 (the '174 application“), which is a continuation-in-part of pending U.S. patent application Ser. No. 11 / 316,508, filed Dec. 22, 2005, which is a continuation-in-part of U.S. patent application Ser. No. 10 / 978,768 (the '768 application), now U.S. Pat. No. 7,537,622 filed Nov. 1, 2004, which is a continuation-in-part of abandoned U.S. patent application Ser. No. 09 / 974,320 (the '320 application), filed on Oct. 10, 2001, and a continuation-in-part of the '320 application. The '174 application also claims the benefit of pending U.S. Provisional Patent Application Ser. No. 61 / 212,668, filed Apr. 14, 2009. The entire disclosure of each of the identified patents and patent applications is incorporated by reference herein.FIELD OF THE INVENTION[0002]A multi-stage process for...

Claims

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Application Information

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IPC IPC(8): C10L5/44C10L5/00
CPCC10L5/04C10L5/442C10L5/445Y02E50/15Y02E50/30Y02E50/10C10L9/083
Inventor CAMPER, CLINTON B.SETHI, VIJAY
Owner BIOMASS SECURE POWER INC
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