Method of preparing a high heating value fuel product

• US 4,875,905 A
• Filed: 11/14/1988
• Issued: 10/24/1989
• Est. Priority Date: 11/14/1988
• Status: Expired due to Fees

• Current Assignee: Solidiwaste Technology LP
• Original Assignee: Solidiwaste Technology LP
• Inventors: Somerville, Robin, Fan, Liang-Tseng
• Primary Examiner(s): Dees, Carl F.
• Application Number:
  US07/270,040
• Time in Patent Office: 344 Days
• Field of Search: 44/16 A, 44/16 B, 44/15 R, 44/601, 44/589, 44/605
• US Class Current: 44/589
• CPC Class Codes: C10L 5/40 essentially based on materials of non-mineral origin
• CPC Class Codes: Y02E 50/10 Biofuels, e.g. bio-diesel
• CPC Class Codes: Y02E 50/30 Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

A method of preparing a high heating value fuel product that comprises the steps of blending a high heating value sludge material with a cellulosic material, adding a microencapsulation reagent to the blended mixture of the sludge and the cellulosic material, introducing a pozzolanic agent to the blended mixture for controlling the rate of solidification, and forming the blended mixture into a form suitable for handling. The sludge is a material having a heating value of greater than 7,000 BTU. This sludge may be a complex mixture of organic hazardous waste streams. The cellulosic material is a silica-containing particulate material having a high heating value. The microencapsulating reagent is a mixture having a 4-15 weight percent of a chemical selected from the group of triethylene glycol, diethylene glycol, and glycerin propylene glycol. The microencapsulation reagent further may include a 20-32 weight percent calcium chloride solution. The pozzolanic agent is added to the mixture at a constant rate. The step of forming includes extruding the blended mixture into a plurality of pellets.

Claims

1. A method of preparing a high heating value fuel product comprising the steps of:

blending a high heating value waste material with a cellulosic material;

mixing an organic reagent to the blended mixture of said waste material and said cellulosic material, said organic reagent being a mixture having a 4-15 weight percent of a chemical selected from the group consisting of;

triethylene glycol, diethylene glycol, and glycerin propylene glycol;

introducing a pozzolanic agent to the blended mixture for controlling the rate of solidification; and

forming said blended mixture into a form suitable for handling.

2. The method of claim 1, said high heating value waste material being a material having a heating value of greater than seven thousand BTU.

3. The method of claim 1, said waste material being a complex mixture of organic hazardous waste streams.

4. The method of claim 1, said cellulosic material being a particulate material having a high heating value.

5. The method of claim 4, said cellulosic material having a size suitable to allow at least eighty percent to pass through a ten mesh sieve.

6. The method of claim 5, said cellulosic material having a material selected from the group consisting of:

rice hulls, wood shavings, sawdust, ground corncobs, grain dust, and cotton gin waste.

7. The method of claim 1, said mixture of said organic reagent further comprising:

a 20-32 weight percent calcium chloride solution.

8. The method of claim 1, said pozzolanic agent being added to said mixture at a constant rate.

9. The method of claim 8, said pozzolanic agent being a substance selected from the group consisting of:

cement kiln dust and fly ash.

10. The method of claim 1, said step of forming comprising:

extruding said blended mixture into a plurality of pellets.

11. The method of claim 10, further comprising the steps of:

coating said plurality of pellets with a pozzolanic coating; and

curing said pellets to a desired strength.

12. The method of claim 1, said cellulosic material being a silica-containing material.

13. A method of preparing a fuel product comprising the steps of:

blending a mixture of an organic hazardous waste stream with a cellulosic material;

mixing a cross-linking reagent to said mixture, said cross-linking reagent being a chemical selected from the group consisting of;

triethylene glycol, diethylene glycol, and glycerin propylene glycol;

blending said mixture and said cross-linking reagent such that cross-linking occurs with organics contained within; and

forming said blended mixture into a form suitable for handling.

14. The method of claim 13, said step of forming further comprising:

extruding said blended mixture into a plurality of pellets; and

coating said plurality of pellets with a pozzolanic material

15. The method of claim 14, further comprising the steps of:

curing said pellets to a desired strength.

16. The method of claim 13, said hazardous waste stream having a heating value greater than 7,000 BTU.

17. The method of claim 13, said cellulosic material being a particulate material having a heating value of greater than 5,000 BTU.

18. The method of claim 13, said chemical of said cross-linking reagent being 4-15 weight percent in solution.

19. The method of claim 13, further comprising the step of:

adding a pozzolanic agent to said blended mixture at a constant rate so as to control the rate of solidification.

20. The method of claim 13, said cross-linking reagent further comprising:

a 20-32 weight percent calcium chloride solution.