Method and apparatus for waste combustion

Patent metadata

Field	Value
Publication number	US-10859262-B2
Application number	US-201715825514-A
Country	US
Kind code	B2
Filing date	Nov 29, 2017
Priority date	Nov 30, 2016
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A toxic waste incinerator is capable of enhanced combustion of hazardous waste (oil contaminated sand, human waste, garbage, etc.) utilizing immersed non-combustible and thermally conductive objects for increasing heat feedback from the flames to the unburned fuel, while air inlets are used to optimize the air entrainment rate to enhance the burning efficiency. The burning rate of a fluidic mass such as a sand-oil mixture is enhanced using immersed conductive objects (copper rods) which enable rapid heat-up of the flame exposed to the upper surface of the rod and transmits heat back into the sand. Consequent conduction of heat to the porous media through the lower portion of the immersed rod significantly increases vaporization and therefore the burning rate. Incineration may be performed on a transient, exigent basis as with hazardous waste and oil spills, or as part of a permanent fixture for receiving an ongoing waste stream.

First claim

What is claimed is:

1. A method for expediting combustion, comprising:
aggregating a fluidic mass of at least partially combustible materials;
inserting a thermally conductive media into the fluidic mass, the thermally conductive media having a bore therethrough for conveying oxygen to the combustion, the fluidic mass including comingled liquid components interspersed with solids having a porosity for facilitating gaseous heat transfer; and
applying an ignition source to the fluidic mass such that the thermally conductive media absorbs heat from the combustion for transferring thermal energy through the thermally conductive media to unignited portions of the fluidic mass.

2. The method of claim 1 wherein the thermally conductive media is an elongated rod adapted for insertion into a mixture of liquid waste and solids.

3. The method of claim 2 wherein the inserted rods provide heat transfer for increasing a temperature of the combustible liquid, heat transfer reducing the viscosity of the combustible liquid for upward transport via capillary action.

4. The method of claim 1 wherein the thermally conductive media is an elongated tube adapted for redirecting and conducting heat into the fluidic mass into which it is inserted.

5. The method of claim 4 wherein the thermal conductive media is a copper cylinder having a bore therethrough for conveying oxygen to the combustion.

6. The method of claim 4 wherein the thermally conductive media is a copper tube having air inlets.

7. The method of claim 1 wherein the fluidic mass is a contaminated porous media including flammable toxic waste.

8. The method of claim 7 wherein the fluidic mass includes petroleum entrenched sand.

9. The method of claim 1 wherein the fluidic mass includes an emulsion of flammable and non-flammable liquids.

10. The method of claim 1 wherein fluidic mass includes a liquid component responsive to vaporization, the liquid component dispersed throughout solid components in the fluidic mass.

11. A waste incinerator apparatus, comprising:
thermally conductive media defined by at least one elongated thermally conductive tube adapted for insertion into a fluidic mass of waste materials,
the thermally conductive tube having a width and depth adapted for redirecting and conducting heat along a length to a subsurface region of the fluidic mass into which it is inserted and having a bore therethrough for conveying oxygen to the combustion; and
an ignition source for commencing combustion of the fluidic mass, the combustion such that the thermally conductive media absorbs heat from the combustion for transferring thermal energy through the thermally conductive media to unignited portions of the fluidic mass.

12. The apparatus of claim 11 wherein the fluidic mass is a contaminated porous media including flammable toxic waste.

13. The apparatus of claim 12 wherein the fluidic mass includes petroleum entrenched sand.

14. The apparatus of claim 11 wherein the fluidic mass includes an emulsion of flammable and non-flammable liquids.

15. The apparatus of claim 11 wherein the thermally conductive media is a copper cylinder.

16. The apparatus of claim 11 wherein the inserted rods provide heat transfer for increasing a temperature of the combustible liquid, heat transfer reducing the viscosity of the combustible liquid for upward transport via capillary action.

17. The apparatus of claim 11 further comprising an incinerator body adapted to maintain the fluidic mass at a working level, the thermally conductive media extending from the working level through a depth maintained by the incinerator body, the thermally conductive media operable for transferring thermal energy from combustion at the working level along the depth.

18. The apparatus of claim 17 further comprising:
a supply conveyer for maintaining the fluidic mass at the working level in the incinerator body; and
an egress conveyor for transporting combusted materials from the incinerator body.

19. A method for expediting combustion, comprising:
aggregating a fluidic mass of at least partially combustible materials;
inserting a thermally conductive media into the fluidic mass, the thermally conductive media defined by an elongated tube adapted for insertion into the fluidic mass and having a bore therethrough for conveying oxygen to the combustion; and
applying an ignition source to the fluidic mass such that the thermally conductive media absorbs heat from the combustion for transferring thermal energy through the thermally conductive media to unignited portions of the fluidic mass.

Assignees

• Worcester Polytech Inst

Inventors

• Arava Shivaprasad
• Arsava Kemal S
• Rangwala Ali S
• Sezer Hayri
• Walawalkar Apoorv
• Raghavan Vasudevan

Classifications

• F23G2206/203

  with a power/heat generating installation · CPC title

• Y02E20/12

  Heat utilisation in combustion or incineration of waste · CPC title

• F23G2206/10

  reintroducing the heat in the same process, e.g. for predrying · CPC title

• F23N2241/18

  Incinerating apparatus · CPC title

• F23G7/05 Primary

  of waste oils · CPC title