Apparatus for converting coal to hydrocarbons

• US 6,013,158 A
• Filed: 03/30/1999
• Issued: 01/11/2000
• Est. Priority Date: 02/02/1994
• Status: Expired due to Fees

• Current Assignee: William A. Wootten
• Original Assignee: William A. Wootten
• Inventors: Wootten, William A.
• Primary Examiner(s): Yildirim, Bekir L.
• Application Number:
  US09/281,219
• Time in Patent Office: 287 Days
• Field of Search: 264/29.1, 264/86, 264/177.14, 425/72.1, 425/461, 202/99, 202/100, 202/108, 202/208, 202/266
• US Class Current: 202/99
• CPC Class Codes: B01D 53/24 by centrifugal force centrifuges B04B; cyclones B04C
• CPC Class Codes: C10B 53/00 Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form wet carbonising of peat C10F
• CPC Class Codes: C10B 7/10 with conveyor-screws
• CPC Class Codes: C10G 1/02 by distillation
• CPC Class Codes: C10J 2300/0906 Physical processes, e.g. shredding, comminuting, chopping, sorting
• CPC Class Codes: C10J 2300/1807 Recycle loops, e.g. gas, solids, heating medium, water
• CPC Class Codes: C10J 3/56 Apparatus; Plants
• CPC Class Codes: C10K 1/02 Dust removal
• CPC Class Codes: C10K 1/028 by electrostatic precipitation separating dispersed particles from gases or vapour by electrostatic effect in general B03C3/00

Abstract

An apparatus for forming liquid hydrocarbons from solid coal. The coal is pulverized to provide a particulate coal feed, which is then extruded to provide a hollow tube of compressed coal supported inside of a support tube. A clay feed is extruded to provide a hollow tube of compressed clay supported inside of the coal tube and a combustible fuel is burned inside of the clay tube. The temperature of combustion is sufficient to fire the extruded clay and pyrolyze the extruded coal to produce hydrocarbon gases and coal char. The support tube has holes for releasing the hydrocarbon gases, which contain suspended particles formed during combustion. The suspended particles are removed from the hydrocarbon gases to provide clean gases, which are passed through an ionizing chamber to ionize at least a portion thereof. The ionized gases are then passed through a magnetic field to separate them from each other according to their molecular weight. Selected portions of at least some of the separated gases are mixed, and the mixed gases are cooled to provide at least one liquid hydrocarbon product of predetermined composition. Portions of the separated gases may also be mixed with the coal char and other input streams, such as waste plastics, and further treated to provide other hydrocarbon products.

Claims

1. An apparatus for forming liquid hydrocarbons from solid coal comprising:

means for pulverizing the coal to provide a particulate coal feed;

means for extruding said coal feed to provide a hollow tube of compressed coal, said extruding means including a support tube for externally supporting said coal tube;

means for extruding a clay feed to provide a hollow tube of compressed clay supported inside of said coal tube;

means for burning a combustible fuel inside of said clay tube, the temperature of said combustion being sufficient to fire said extruded clay and pyrolyze said extruded coal to produce hydrocarbon gases and coal char, said support tube having holes for releasing said hydrocarbon gases, and,

means for cooling said hydrocarbon gases to provide a liquid hydrocarbon product.

2. An apparatus according to claim 1, wherein said hydrocarbon gases contain suspended particles formed during said combustion and said apparatus further comprises:

means for removing said suspended particles from said hydrocarbon gases to provide clean gases;

ionizing means having an ionizing chamber to ionize at least a portion of said clean gases;

magnetic means providing a magnetic field to separate said ionized gases from each other according to their molecular weight;

means for mixing selected portions of at least some of said separated gases; and

means for cooling said mixed gases to provide at least one liquid hydrocarbon product of predetermined composition.

3. An apparatus according to claim 2, wherein said removing means comprises:

a bed of metal balls contained within a ball chamber, each of said metal balls having a plurality of through holes for the passage of said hydrocarbon gases such that said passage of the hydrocarbon gases causes said suspended particles to be deposited as a residue on said metal balls;

means for withdrawing a portion of said metal balls from the bed in said ball chamber;

means for cleaning said withdrawn metal balls by blasting them with an inert gas to remove said residue; and

,

means for returning said cleaned metal balls to the bed in said ball chamber.

4. An apparatus according to claim 1, further comprising:

means for breaking up and cooling said fired clay and said coal char to provide pieces of clay and pieces of char;

means for separating said char pieces from said clay pieces;

means for pulverizing said char pieces to provide powdered char; and

means for dispersing said powered char in a combustible liquid to provide a liquid hydrocarbon fuel.

5. An apparatus according to claim 4, further comprising means for forming said combustible liquid by a process comprised of heating a solid plastic material.

6. An apparatus according to claim 1 further comprising means for rotating said support tube at least during said coal extruding step, and an oxygen free chamber into which said support tube holes release said hydrocarbon gases.

7. An apparatus for converting solid coal and a solid plastic material to a liquid fuel comprising:

means for pulverizing the coal to provide a particulate coal feed;

means for extruding said coal feed to provide a hollow tube of compressed coal, said extruding means including a support tube for externally supporting said coal tube;

means for extruding a clay feed to provide a hollow tube of compressed clay supported inside of said coal tube;

means for burning a combustible fuel inside of said clay tube, the temperature of said combustion being sufficient to fire said extruded clay and pyrolyze said extruded coal to produce hydrocarbon gases and coal char, said support tube having holes for releasing said hydrocarbon gases;

means for pulverizing said coal char to provide powdered char;

means for providing a combustible liquid by heating a solid plastic material; and

,

means for dispersing said powdered char in said combustible liquid to provide a liquid hydrocarbon fuel.

8. An apparatus according to claim 7, further comprises means for forming said combustible liquid by heating a solid plastic material containing organic chlorides to a sufficiently high temperature and compressing said waste plastic material in the presence of water at a sufficiently rapid rate to convert said plastic material to said combustible liquid, and to expel chlorine ions from said plastic material and convert said expelled chlorine ions to hydrogen chloride.

9. An apparatus according to claim 7 further comprising means for rotating said support tube at least during said coal extruding step, and an oxygen free chamber into which said support tube holes release said hydrocarbon gases.

10. An apparatus for extruding and rotating an extrudable material to form a tubular structure, said apparatus comprising:

a first tube having an inside surface with at least one spiral corrugation;

a nozzle for extruding said material into said first tube such that said corrugation causes the extruded material to rotate and form a rotating tubular structure having a corresponding convolution on an outer surface and a hollow interior chamber defined by an inner surface of the tubular structure; and

a second tube arranged to receive the tubular structure from said first tube, said second tube being arranged to rotate relative to said first tube and having a tapered section with an inner surface of decreasing taper from inlet to outlet such that said convolution is compressed and the rotational speed of the tubular structure is increased by rotation of said second tube.

11. An extrusion apparatus according to claim 10, wherein the inner surface of said second tube is substantially smooth, and wherein the size of said second tube relative to the rate at which said nozzle extrudes said extrudable material is such that said extruded material remains in said second tube for a time sufficient to substantially smooth out said convolution on the outer surface of the tubular structure.

12. An extrusion apparatus according to claim 10, wherein the size of said second tube relative to the rate at which said nozzle means extrudes said extrudable material is such that the tubular structure remains in said second tube for a period of time sufficient for the tubular structure to achieve a rotational speed substantially equal to the rotational speed of said second tube.

13. An extrusion apparatus according to claim 10, wherein said extrusion nozzle is a stationary nozzle and said first tube rotates relative to said nozzle.

14. An extrusion apparatus according to claim 10, wherein the corrugated inside surface of said first tube comprises a plurality of corrugations for providing a plurality of convolutions on the outer surface the tubular structure.

15. An extrusion apparatus according to claim 14, wherein the corrugations of said first tube extend transversely relative to a rotational axis thereof and have a spiral form such that said convolutions have a corresponding spiral form.

16. An extrusion apparatus according to claim 10, for extruding an extrudable material containing a heavy fraction of greater density than a light fraction, and wherein said second tube includes a perforated section located downstream of said tapered section and having a perforated wall for separating said heavy fraction from said high fraction by discharging said heavy fraction through the perforated wall when said perforated section is rotated.

17. An extrusion apparatus according to claim 16, wherein said extrusion nozzle is a stationary nozzle and said first tube rotates relative to said nozzle.

18. An extrusion apparatus according to claim 17 further comprising heating means for heating the tubular structure by passing a heat producing medium through its hollow interior.

19. An extrusion apparatus according to claim 18 for simultaneously extruding both a combustible material and a heat resistant material, and wherein said nozzle comprises means for extruding said heat resistant material as a protective layer inside of a layer of said combustible material such that said inner surface of the tubular structure is provided by said protective layer.

20. An extrusion apparatus according to claim 19, wherein said combustible material comprises an organic material and said heat resistant material comprises an inorganic material, and wherein said heating means provides sufficient heat to said combustible layer to reduce at least a portion of said organic material to carbon.