Solid fuel

• US 9,663,737 B2
• Filed: 09/17/2010
• Issued: 05/30/2017
• Est. Priority Date: 09/17/2010
• Status: Expired due to Fees

• Current Assignee: Michihiro Kiyama
• Original Assignee: Michihiro Kiyama
• Inventors: Kiyama, Michihiro, Yamamoto, Masayuki
• Primary Examiner(s): Goloboy, James
• Assistant Examiner(s): Po, Ming Cheung
• Application Number:
  US13/822,505
• Publication Number:
  US 20140082997A1
• Time in Patent Office: 2,447 Days
• CPC Class Codes: C10L 2200/0484 Vegetable or animal oils
• CPC Class Codes: C10L 2250/04 Additive or component is a polymer
• CPC Class Codes: C10L 5/14 with organic binders
• CPC Class Codes: C10L 5/363 Pellets or granulates
• CPC Class Codes: C10L 5/365 Logs
• CPC Class Codes: C10L 5/40 essentially based on materials of non-mineral origin
• CPC Class Codes: C10L 5/403 on paper and paper waste
• CPC Class Codes: C10L 5/442 Wood or forestry waste
• CPC Class Codes: C10L 5/445 Agricultural waste, e.g. corn crops, grass clippings, nut shells or oil pressing residues
• 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

To provide a solid fuel which uses waste wood, used paper, a binder, a form retaining agent and a caloric augmentation agent in a balanced manner, has a stable calorific value, and suppresses the production of carbon dioxide. A solid fuel which is formed from a mixture of wood pieces having a size of 1 to 50 mm, paper pieces having a size of 1 to 50 mm, a binder, a form retaining agent and a caloric augmentation agent, wherein the mixture contains the wood pieces and the paper/natural fiber pieces in a total amount of 15 to 45 parts by weight and the binder, the form retaining agent and the caloric augmentation agent in a total amount of 55 to 85 parts by weight, has a weight ratio of the wood pieces to the paper pieces of 20:80 to 80:20, and is molded.

Claims

1. A solid fuel which is formed from a mixture of wood pieces having a size of 1 to 50 mm (component A), paper pieces having a size of 1 to 50 mm (component B), a binder (component C-1), a form retaining agent (component C-2) and a caloric augmentation agent (component D), wherein the total amount of the components A and B is 15 to 45 parts by weight and the total amount of the components C-1, C-2 and D is 55 to 85 parts by weight based on 100 parts by weight of the mixture, the weight ratio of the component A to the component B is 20:

80 to 80;

20, and the mixture is compression molded, the binder (component C-1) comprises starch derived from sea alga;

the form retaining agent (component C-2) comprises natural rubber; and

the caloric augmentation agent (component D) comprises a vegetable oil-containing substance selected from the fruit seeds of Sapium sebiferum, Ricinus communis and Jatropha curcas or pulverized product thereof.

2. The solid fuel according to claim 1, wherein the total amount of the components C-1 and C-2 is 25 to 60 parts by weight based on 100 parts by weight of the mixture.

3. The solid fuel according to claim 1, wherein the amount of the component D is 15 to 60 parts by weight based on 100 parts by weight of the mixture.

4. The solid fuel according to claim 1, wherein the weight ratio of the component C-1 to the component C-2 is 6:

4 to 8;

2.

5. The solid fuel according to claim 1, wherein the weight ratio of the component A to the component B is 25:

75 to 75;

25.

6. The solid fuel according to claim 1 having an average size of 10 to 100 cm³ each.

7. The solid fuel according to claim 1 which is prismatic or cylindrical in shape.

8. The solid fuel according to claim 1 having a bulk specific gravity of 0.3 to 0.6 g/cm³.

9. The solid fuel according to claim 1 having a calorific value of 20 to 30 MJ/kg.

10. The solid fuel according to claim 1 which configured for thermal power generation.