GB1570002A - Gasification of solid carbonaceous fuels - Google Patents

Gasification of solid carbonaceous fuels Download PDF

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Publication number
GB1570002A
GB1570002A GB1719076A GB1719076A GB1570002A GB 1570002 A GB1570002 A GB 1570002A GB 1719076 A GB1719076 A GB 1719076A GB 1719076 A GB1719076 A GB 1719076A GB 1570002 A GB1570002 A GB 1570002A
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United Kingdom
Prior art keywords
fuel
chamber
section
gas
swelling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1719076A
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WELLMAN INCANDESCENT Ltd
Original Assignee
WELLMAN INCANDESCENT Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WELLMAN INCANDESCENT Ltd filed Critical WELLMAN INCANDESCENT Ltd
Priority to GB1719076A priority Critical patent/GB1570002A/en
Publication of GB1570002A publication Critical patent/GB1570002A/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/74—Construction of shells or jackets
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/30—Fuel charging devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
    • C10J3/60—Processes
    • C10J3/64—Processes with decomposition of the distillation products
    • C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/74—Construction of shells or jackets
    • C10J3/76—Water jackets; Steam boiler-jackets
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/82—Gas withdrawal means
    • C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2200/00—Details of gasification apparatus
    • C10J2200/36—Moving parts inside the gasification reactor not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0956—Air or oxygen enriched air
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
    • C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Description

(54) IMPROVEMENTS RELATING TO GASIFICATION OF SOLID CARBONACEOUS FUELS (71) We, WELLMAN INCANDESCENT lIMITED, a British Company of Cornwall Road, Smethwick, Warley, West Midlands, do hereby declare the invention, for which we pray that a Patent may be granted to us, and the method by which it is to be performed to be particularly described in and by the following statement: This invention relates to the gasification of solid carbonaceous fuels, and its object is to provide an improved method and apparatus particularly capable of dealing with fuels having high swelling numbers as established by the Woodall-Duckham button test.
In accordance with one aspect of the present invention we provide a method of gasifying solid carbonaceous fuel, comprising heating the fuel in a first reaction chamber to effect distillation of volatiles from the fuel and transferring the fuel from said first chamber to a second reaction chamber in which gasification of the fuel is effected, characterised in that during transfer of the fuel between said chambers the fuel is heated in an expansion chamber through at least a major part of a temperature range over which it exhibits substantial swelling and the swollen fuel mass is broken down into discrete lumps or particles before being deposited into said second chamber.
In accordance with a second aspect of the invention we provide apparatus for gasifying solid carbonaceous fuel, comprising a first reaction. chamber provided with heating means for effecting distillation of volatiles from the fuel, a second reaction chamber provided with means for effecting gasification of the fuel therein and an expansion chamber extending between the bottom of said first chamber and the top of said second chamber, the expansion chamber being adapted to be heated by means of gases derived from said second chamber and being provided with means for feeding the fuel through the expansion chamber from the first chamber to the second chamber so that, in use, the fuel can be heated in the expansion chamber through at least a major part of the temperature range over which the fuel exhibits substantial swelling, and means disposed adjacent the downstream end of the expansion chamber for breaking down the swollen fuel mass into discrete lumps or particles before the fuel is deposited into the second chamber.
Using the method and apparatus of the invention, the advantages of two stage gasification can be attained, that is to say the control over the process enabling desired qualities of products to be attained, with fuels having high swelling numbers which could not hitherto be treated in two stage gasifiers.
One presently preferred embodiment of the invention is now described by way of illustration and with reference to the accompanying drawing wherein the sole figure is a somewhat schematic layout of a gasification plant.
Referring to the drawing, fuel, for example bituminous coal, brown coal or lignite having substantial agglomerating and caking properties and hence a high swelling number, may be fed to a bunker 10 and thence via a sealed valve construction 12 to a first treatment chamber 14. In the chamber 14 the fuel is heated so as to distil volatiles which emerge as "top gas" via passage 16 and are fed by way of a tar cyclone 18 to a mixing chamber 20 and hence to a gas outlet 22.
In the chamber 14 heating is effected by heat exchange through the chamber wall from a lower jacket 24 fed with bottom gas via pipe 26 from a second treatment chamber as hereinafter described, and after the heat exchange the bottom gas is conducted via pipe 28 to merge with bottom gas originally derived from the said second section and passed by way of dust cyclone 30 and pipe 32 to the mixing chamber 20.
The section 14 is also provided with a second and upper jacket 34 isolated from the lower jacket, so that gas originally derived for example (and as illustrated) from the pipe 32 may be combusted completely to impart the required heat to the fuel in the section 14 and exhaust to a fuel stack by way of outlet passage 36.
The said second treatment section 40 receives the fuel after distillation of the volatiles therefrom, and is laterally displaced from the section 14. It is provided with appropriate tuyeres 42 for air blast which may be generally axially located, and with arrangements for discharge of coke or ash residues generally annually grouped about the inlet 42 and indicated by reference numeral 44. Gas generated in the section 40 is discharged, in part, via an annular passage 46, or via several separate passages arranged for example in an annular pattern, so as to supply the feed pipe 26 previously mentioned and also supply pipe 48 which feeds the gas main 32 via dust cyclone 30.
A proportion of the gas generated in the section 40 is fed upwardly and via an expansion chamber 50 as hereinafter described to flow to the first section 14.
The expansion chamber 50 extends from below the first section 14 to above the second section 40, and houses a conveyor 52 which may be made of appropriate heat resisting material and possibly with protective means applied to the end drums of the conveyor. The conveyor size and running rate is arranged in relation to the feed rate of fuel from the first section 14 so as to allow the whole of the swelling of the fuel to take place in the expansion chamber particularly (although not necessarily exculsively) by lateral movement of the fuel bed on the conveyor surface.In other words, the fuel in the pre-plastic and pre-swelled state is deposited on the conveyor 52 immediately below the first section 14 as a relatively narrow ribbon, and during conveyance through the chamber 50 is heated through the swelling zone and allowed to spread into a wide ribbon and may also increase in thickness as a result of the swelling.
The heating is effected partly by heat trans fer from the gas originating from the second section 40 and flowing through the chamber 50 on its way to the first section 14, and also by radiant heater jackets such as 54 fed with gas for example from the pipe 32 via branch 56, by complete combustion of that gas in the jackets, and with combustion products fed via exhaust passage 58 which may as illustrated be used to heat the fuel in the distillation section 14 by heat exchange before exhaust at 36.
The mat of expanded and effectively plasti cised fuel on the conveyor 52 is fed over the end drum 60, substantially vertically above the second section 40, and requires to be separated into discrete pieces in order to allow flow of gases therebetween and to allow the gasification process in the second section 40 to proceed efficiently. It is found experimentally that if the fuel is broken or mechanically separated into pieces after swelling has been completed, the lumps have no tendency to agglutinate br otherwise cohere. The apparatus is therefore provided with breaker means, for example in the form of spaced parallel fingers 62 which are interdigitated by rotating fingers carried on drum 64, and with the mat of fuel arranged to pass over the end drum 60 and between that and the rotating part 64 so as to be acted upon by the various fingers.
It will be noted that (desirably) all of the expansion or swelling takes place in the chambe 50 and this entails maintaining the fuel in the chamber whilst it is raised in temperature through the swelling zone. It will be appreciated that a continuous process is envisaged, and by the use of the conveyor, there will be fuel in the chamber 50 at all stages from commencement of the swelling zone to completion of the same, at different points along the length of the conveyor.
It will be noted that in the event of any failure, so that the process has to be interrupted, the chamber 50 will be relatively accessible from below or above.
It is believed that the invention will not only enable a much greater range of different coal types to be gasified, but will also enable the gasification process to be carried out more efficiently than hitherto, particularly because of the avoidance of large solid masses in the gasification section.
It will be appreciated that valves and other control means will be provided at different points in the apparatus to control the amount of gas flowing along the alternative paths, the amount being burnt for heating purposes for example in the heating jackets, and the amount of fuel fed and air blast injected, to suit operating rates, variations in fuel supply and the like.
WHAT WE CLAIM IS: 1. A method of gasifying solid carbonaceous fuel, comprising heating the fuel in a first reaction chamber to effect distillation of volatiles from the fuel and transferring the fuel from said first chamber to a second reaction chamber in which gasification of the fuel is effected, characterised in that during transfer of the fuel between said chambers the fuel is heated in an expansion chamber through at least a major part of a temperature range over which it exhibits substantial swelling and the swollen fuel mass is broken down into discrete lumps or particles before being deposited into said second chamber.
2. A method as claimed in Claim l in which the fuel is heated in said expansion chamber by means of gases derived from the second cham ber.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (19)

**WARNING** start of CLMS field may overlap end of DESC **. with bottom gas originally derived from the said second section and passed by way of dust cyclone 30 and pipe 32 to the mixing chamber 20. The section 14 is also provided with a second and upper jacket 34 isolated from the lower jacket, so that gas originally derived for example (and as illustrated) from the pipe 32 may be combusted completely to impart the required heat to the fuel in the section 14 and exhaust to a fuel stack by way of outlet passage 36. The said second treatment section 40 receives the fuel after distillation of the volatiles therefrom, and is laterally displaced from the section 14. It is provided with appropriate tuyeres 42 for air blast which may be generally axially located, and with arrangements for discharge of coke or ash residues generally annually grouped about the inlet 42 and indicated by reference numeral 44. Gas generated in the section 40 is discharged, in part, via an annular passage 46, or via several separate passages arranged for example in an annular pattern, so as to supply the feed pipe 26 previously mentioned and also supply pipe 48 which feeds the gas main 32 via dust cyclone 30. A proportion of the gas generated in the section 40 is fed upwardly and via an expansion chamber 50 as hereinafter described to flow to the first section 14. The expansion chamber 50 extends from below the first section 14 to above the second section 40, and houses a conveyor 52 which may be made of appropriate heat resisting material and possibly with protective means applied to the end drums of the conveyor. The conveyor size and running rate is arranged in relation to the feed rate of fuel from the first section 14 so as to allow the whole of the swelling of the fuel to take place in the expansion chamber particularly (although not necessarily exculsively) by lateral movement of the fuel bed on the conveyor surface.In other words, the fuel in the pre-plastic and pre-swelled state is deposited on the conveyor 52 immediately below the first section 14 as a relatively narrow ribbon, and during conveyance through the chamber 50 is heated through the swelling zone and allowed to spread into a wide ribbon and may also increase in thickness as a result of the swelling. The heating is effected partly by heat trans fer from the gas originating from the second section 40 and flowing through the chamber 50 on its way to the first section 14, and also by radiant heater jackets such as 54 fed with gas for example from the pipe 32 via branch 56, by complete combustion of that gas in the jackets, and with combustion products fed via exhaust passage 58 which may as illustrated be used to heat the fuel in the distillation section 14 by heat exchange before exhaust at 36. The mat of expanded and effectively plasti cised fuel on the conveyor 52 is fed over the end drum 60, substantially vertically above the second section 40, and requires to be separated into discrete pieces in order to allow flow of gases therebetween and to allow the gasification process in the second section 40 to proceed efficiently. It is found experimentally that if the fuel is broken or mechanically separated into pieces after swelling has been completed, the lumps have no tendency to agglutinate br otherwise cohere. The apparatus is therefore provided with breaker means, for example in the form of spaced parallel fingers 62 which are interdigitated by rotating fingers carried on drum 64, and with the mat of fuel arranged to pass over the end drum 60 and between that and the rotating part 64 so as to be acted upon by the various fingers. It will be noted that (desirably) all of the expansion or swelling takes place in the chambe 50 and this entails maintaining the fuel in the chamber whilst it is raised in temperature through the swelling zone. It will be appreciated that a continuous process is envisaged, and by the use of the conveyor, there will be fuel in the chamber 50 at all stages from commencement of the swelling zone to completion of the same, at different points along the length of the conveyor. It will be noted that in the event of any failure, so that the process has to be interrupted, the chamber 50 will be relatively accessible from below or above. It is believed that the invention will not only enable a much greater range of different coal types to be gasified, but will also enable the gasification process to be carried out more efficiently than hitherto, particularly because of the avoidance of large solid masses in the gasification section. It will be appreciated that valves and other control means will be provided at different points in the apparatus to control the amount of gas flowing along the alternative paths, the amount being burnt for heating purposes for example in the heating jackets, and the amount of fuel fed and air blast injected, to suit operating rates, variations in fuel supply and the like. WHAT WE CLAIM IS:
1. A method of gasifying solid carbonaceous fuel, comprising heating the fuel in a first reaction chamber to effect distillation of volatiles from the fuel and transferring the fuel from said first chamber to a second reaction chamber in which gasification of the fuel is effected, characterised in that during transfer of the fuel between said chambers the fuel is heated in an expansion chamber through at least a major part of a temperature range over which it exhibits substantial swelling and the swollen fuel mass is broken down into discrete lumps or particles before being deposited into said second chamber.
2. A method as claimed in Claim l in which the fuel is heated in said expansion chamber by means of gases derived from the second cham ber.
3. A method as claimed in Claim 1 or 2 in
which the rate at which the fuel is moved through the expansion chamber is regulated such that the whole of the swelling of the fuel takes place in the expansion chamber.
4. A method as claimed in Claim 1, 2 or 3 in which the fuel is conveyed through the expansion chamber by a conveyor on which the fuel is deposited so as to form a relatively narrow ribbon which, as a result of swelling of the fuel, spreads into a wider ribbon.
5. A method as claimed in Claim 1, 2, 3 or 4 in which the fuel is heated in said expansion chamber at least partly by heat radiation from heater jackets in which gas derived from said second chamber is combusted.
6. A method as claimed in Claim 5 in which the hot combustion products from said heater jackets are passed to the heat exchanger associated with the first chamber.
7. A method as claimed in any one of Claims 1 to 6 including combining gas derived from said first chamber with gas derived from the second chamber.
8. A method as claimed in Claim 7 including passing the gas derived from the first chamber through a tar cyclone.
9. A method as claimed in Claim 7 or 8 in which the gas from said second chamber, which is combined with the gas from the first chamber, is extracted from the second chamber at a location below the top thereof.
10. Apparatus for gasifying solid carbonaceous fuel, comprising a first reaction chamber provided with heating means for effecting distillation of volatiles from the fuel, a second reaction chamber provided with means for effecting gasification of the fuel therein and an expansion chamber extending between the bottom of said first chamber and the top of said second chamber, the expansion chamber being adapted to be heated by means of gases derived from said second chamber and being provided with means for feeding the fuel through the expansion chamber from the first chamber to the second chamber so that, in use, the fuel can be heated in the expansion chamber through at least a major part of the temperature range over which the fuel exhibits substantial swelling, and means disposed adjacent the downstream end of the expansion chamber for breaking down the swollen fuel mass into discrete lumps or particles before the fuel is deposited into the second chamber.
11. Apparatus as claimed in Claim 10 in which the feed means is operable to feed the fuel at different rates through the expansion chamber.
12. Apparatus as claimed in Claim 10 or 11 in which the expansion chamber is arranged to receive a proportion of the gases produced in the second chamber and is provided with radiation heating jackets which also receive and combust gases derived from said second chamber.
13. Apparatus as claimed in Claim 12 in which said first chamber is provided with a heat exchange jacket which receives the hot combus tion products from said radiation heating jackets associated with the expansion chamber.
14. Apparatus as claimed in Claim 13 in which said first chamber is further provided with a heat exchange jacket which directly receives gases derived from said second chamber.
15. Apparatus as claimed in any one of Claims 10-14 including a mixing chamber con nected to said first and second chambers to receive and mix together gases produced there by.
16. Appartus as claimed in Claim 15 in which the mixing chamber is connected to said first chamber via a tar cyclone.
17. Apparatus as claimed in Claim 15 or 16 in which the mixing chamber is connected to said second chamber via a gas supply pas sage whose inlet is disposed below the top of said second chamber.
18. A method of gasifying solid carbon aceous fuel, substantially as hereinbefore des cribed with reference to the accompanying drawing.
19. Apparatus for gasifying solid carbon aceous fuel, substantially as hereinbefore des cribed with reference to, and as shown in, the accompanying drawing.
GB1719076A 1977-03-02 1977-03-02 Gasification of solid carbonaceous fuels Expired GB1570002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1719076A GB1570002A (en) 1977-03-02 1977-03-02 Gasification of solid carbonaceous fuels

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Application Number Priority Date Filing Date Title
GB1719076A GB1570002A (en) 1977-03-02 1977-03-02 Gasification of solid carbonaceous fuels

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GB1570002A true GB1570002A (en) 1980-06-25

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4372756A (en) * 1981-06-30 1983-02-08 Mansfield Carbon Products, Inc. Two-stage coal gasification process
WO1994029410A1 (en) * 1993-06-04 1994-12-22 Biokat Corporation Gasification of low calorific value solid fuels to produce electric energy

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4372756A (en) * 1981-06-30 1983-02-08 Mansfield Carbon Products, Inc. Two-stage coal gasification process
WO1994029410A1 (en) * 1993-06-04 1994-12-22 Biokat Corporation Gasification of low calorific value solid fuels to produce electric energy
US5626638A (en) * 1993-06-04 1997-05-06 Biokat Corporation Gasification of low calorific value solid fuels to produce electric energy

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Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee