GB2131046A - Process for manufacturing a fuel briquette - Google Patents

Process for manufacturing a fuel briquette Download PDF

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Publication number
GB2131046A
GB2131046A GB08331332A GB8331332A GB2131046A GB 2131046 A GB2131046 A GB 2131046A GB 08331332 A GB08331332 A GB 08331332A GB 8331332 A GB8331332 A GB 8331332A GB 2131046 A GB2131046 A GB 2131046A
Authority
GB
United Kingdom
Prior art keywords
moisture content
briquette
waste paper
moisture
peat
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.)
Withdrawn
Application number
GB08331332A
Other versions
GB8331332D0 (en
Inventor
John Connor
Christopher P Wilkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STIRLING FIBRE FUELS Ltd
Original Assignee
STIRLING FIBRE FUELS 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
Priority claimed from GB838312617A external-priority patent/GB8312617D0/en
Application filed by STIRLING FIBRE FUELS Ltd filed Critical STIRLING FIBRE FUELS Ltd
Priority to GB08331332A priority Critical patent/GB2131046A/en
Publication of GB8331332D0 publication Critical patent/GB8331332D0/en
Publication of GB2131046A publication Critical patent/GB2131046A/en
Withdrawn legal-status Critical Current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
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

A process for manufacturing a fuel briquette comprises mixing a water-containing carbonaceous material with waste paper and extruding the mixture to form a briquette. Peat, wood bark and coal dust slurries are suitable water containing materials.

Description

SPECIFICATION Process for manufacturing a fuel briquette This invention relates to fuel briquettes made from waste paper.
Waste paper which is principally air-dry (10% moisture) is shredded or pulverised and passed through a briquetting machine or "densifier". This extrudes the waste paper through a number of dies at a rate of up to about 10 tonnes per hour.
The temperature at the inner edge of the die reaches about 4000F (2050C) and at the outer edge of the die it declines to about 2000F (830C).
This temperature is reached after about 30 minutes of running time and remains relatively constant throughout production.
Water has to be added to the feed stock of shredded paper prior to it entering the "densifier", to ensure fusion of the fibres. The amount of water added will vary between 5 and 15%, depending on the type and state of the feed stock.
At the point of extrusion a certain amount of moisture (perhaps 5 to 10%) is flashed off and the finished product is removed on a chain mesh conveyor where further moisture evaporates in the natural cooling process. The final moisture content is between 10 and-20%, with a calorific value of from 6,000 Btu/lb to 7,500 Btu/lb (633 to 7913 kJ) depending on moisture content.
An object of the present invention is to improve on the above process.
According to the present invention there is provided a process for manufacturing a fuel briquette which comprises mixing a watercontaining carbonaceous material with waste paper and extruding the mixture to form a fuel briquette.
The water-containing carbonaceous material may be selected from peat, wood bark or a coal dust slurry.
Preferably in the case of peat the mixture comprises from 1050% peat having a moisture content of from 20 to 60% with waste paper having a moisture content of from 5 to 1 5% forming balance.
Peat has a calorific value of around 3200 Btu/lb at 55% moisture and about 8000 Btu/lb at 10% moisture. The moisture in peat can be reduced by natural drying down to a best, 30%, but tends to average nearer 40%. Further reduction of the moisture content of peat can only be achieved by using energy to dry the material on a major plant.
Preferably in the case of a coal slurry the mixture comprises from 550% coal dust slurry having a moisture content of from 1 5 to 75% with waste paper having a moisture content of from 5 to 20% forming the balance.
Coal dust slurry has a calorific value of around 6,500 Btu/lb (6858 kJ) at 50% moisture and 12,000-1 5,000 Btu/lb (12,600-1 5,825 kJ) at 10% moisture. Coal dust slurry is not usually used for burning due to the high moisture content and sometime inclusion of non-combustable matter such as bed rock. The briquetting and the reduction of the moisture content in conventional circumstances would require such energy input as to make the end product of only marginal value.
However, by using waste paper as a drying agent in accordance with the process of this invention, coal dust slurry is converted to a useful fuel enabling the use of energy which otherwise would be unobtainable.
In a first embodiment of this invention, peat with a moisture content of about 40% was added to waste paper with a moisture content of about 10% at a 20% addition rate and extruded to form a briquette with a moisture content of between 10 and 1 5%. This burns more slowly than a pure waste paper briquette and hotter than a peat briquette of 30% moisture. It is clean to handle, has a brownish skim surface which gives the briquette a pleasant appearance and it also has a faintly peaty smell.
Wood bark exhibits similar properties to peat but also requires considerable drying before being acceptable for fuel purposes. However it can be quite usefully applied in the process of this invention.
In a second embodiment of this invention, coal dust slurry with a moisture content of about 45% was added to waste paper with a moisture content of about 10% at a 15% addition rate and extruded to form a briquette of about 1 5% moisture content at calorific value of 9400 Btu/lb (9917 kJ). The briquette then has a calorific value which is higher than the sum of the calorific value of the individual components and burns considerably slower than a pure waste paper briquette. It is also denser and holds its form better.
The coal dust slurry tends to produce a polished black skim-surface which gives the briquette a uniform appearance and it also has the advantage of being relatively clean to handle.
Claims
1. A process for manufacturing a fuel briquette which comprises mixing a water-containing carbonaceous material with waste paper and extruding the mixture to form a fuel briquette.
2. A process according to claim 1 wherein the carbonaceous material is selected from peat, wood bark or a coal dust slurry.
3. A process according to claim 1 or claim 2 wherein the mixture comprises from 1050% peat having a moisture content of from 20 to 60% with waste paper having a moisture content of from 5 to 15% forming the balance.
4. A process according to claim 1 or claim 2 wherein the mixture comprises from 550% coal dust slurry having a moisture content of from 1 5 to 75% with waste paper having a moisture content of from 5 to 20% forming the balance.
5. A process for manufacturing a fuel briquette substantially as hereinbefore described.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Process for manufacturing a fuel briquette This invention relates to fuel briquettes made from waste paper. Waste paper which is principally air-dry (10% moisture) is shredded or pulverised and passed through a briquetting machine or "densifier". This extrudes the waste paper through a number of dies at a rate of up to about 10 tonnes per hour. The temperature at the inner edge of the die reaches about 4000F (2050C) and at the outer edge of the die it declines to about 2000F (830C). This temperature is reached after about 30 minutes of running time and remains relatively constant throughout production. Water has to be added to the feed stock of shredded paper prior to it entering the "densifier", to ensure fusion of the fibres. The amount of water added will vary between 5 and 15%, depending on the type and state of the feed stock. At the point of extrusion a certain amount of moisture (perhaps 5 to 10%) is flashed off and the finished product is removed on a chain mesh conveyor where further moisture evaporates in the natural cooling process. The final moisture content is between 10 and-20%, with a calorific value of from 6,000 Btu/lb to 7,500 Btu/lb (633 to 7913 kJ) depending on moisture content. An object of the present invention is to improve on the above process. According to the present invention there is provided a process for manufacturing a fuel briquette which comprises mixing a watercontaining carbonaceous material with waste paper and extruding the mixture to form a fuel briquette. The water-containing carbonaceous material may be selected from peat, wood bark or a coal dust slurry. Preferably in the case of peat the mixture comprises from 1050% peat having a moisture content of from 20 to 60% with waste paper having a moisture content of from 5 to 1 5% forming balance. Peat has a calorific value of around 3200 Btu/lb at 55% moisture and about 8000 Btu/lb at 10% moisture. The moisture in peat can be reduced by natural drying down to a best, 30%, but tends to average nearer 40%. Further reduction of the moisture content of peat can only be achieved by using energy to dry the material on a major plant. Preferably in the case of a coal slurry the mixture comprises from 550% coal dust slurry having a moisture content of from 1 5 to 75% with waste paper having a moisture content of from 5 to 20% forming the balance. Coal dust slurry has a calorific value of around 6,500 Btu/lb (6858 kJ) at 50% moisture and 12,000-1 5,000 Btu/lb (12,600-1 5,825 kJ) at 10% moisture. Coal dust slurry is not usually used for burning due to the high moisture content and sometime inclusion of non-combustable matter such as bed rock. The briquetting and the reduction of the moisture content in conventional circumstances would require such energy input as to make the end product of only marginal value. However, by using waste paper as a drying agent in accordance with the process of this invention, coal dust slurry is converted to a useful fuel enabling the use of energy which otherwise would be unobtainable. In a first embodiment of this invention, peat with a moisture content of about 40% was added to waste paper with a moisture content of about 10% at a 20% addition rate and extruded to form a briquette with a moisture content of between 10 and 1 5%. This burns more slowly than a pure waste paper briquette and hotter than a peat briquette of 30% moisture. It is clean to handle, has a brownish skim surface which gives the briquette a pleasant appearance and it also has a faintly peaty smell. Wood bark exhibits similar properties to peat but also requires considerable drying before being acceptable for fuel purposes. However it can be quite usefully applied in the process of this invention. In a second embodiment of this invention, coal dust slurry with a moisture content of about 45% was added to waste paper with a moisture content of about 10% at a 15% addition rate and extruded to form a briquette of about 1 5% moisture content at calorific value of 9400 Btu/lb (9917 kJ). The briquette then has a calorific value which is higher than the sum of the calorific value of the individual components and burns considerably slower than a pure waste paper briquette. It is also denser and holds its form better. The coal dust slurry tends to produce a polished black skim-surface which gives the briquette a uniform appearance and it also has the advantage of being relatively clean to handle. Claims
1. A process for manufacturing a fuel briquette which comprises mixing a water-containing carbonaceous material with waste paper and extruding the mixture to form a fuel briquette.
2. A process according to claim 1 wherein the carbonaceous material is selected from peat, wood bark or a coal dust slurry.
3. A process according to claim 1 or claim 2 wherein the mixture comprises from 1050% peat having a moisture content of from 20 to 60% with waste paper having a moisture content of from 5 to 15% forming the balance.
4. A process according to claim 1 or claim 2 wherein the mixture comprises from 550% coal dust slurry having a moisture content of from 1 5 to 75% with waste paper having a moisture content of from 5 to 20% forming the balance.
5. A process for manufacturing a fuel briquette substantially as hereinbefore described.
GB08331332A 1982-11-24 1983-11-24 Process for manufacturing a fuel briquette Withdrawn GB2131046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08331332A GB2131046A (en) 1982-11-24 1983-11-24 Process for manufacturing a fuel briquette

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8233557 1982-11-24
GB838312617A GB8312617D0 (en) 1983-05-06 1983-05-06 Manufacturing fuel briquette
GB08331332A GB2131046A (en) 1982-11-24 1983-11-24 Process for manufacturing a fuel briquette

Publications (2)

Publication Number Publication Date
GB8331332D0 GB8331332D0 (en) 1984-01-04
GB2131046A true GB2131046A (en) 1984-06-13

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Family Applications (1)

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GB08331332A Withdrawn GB2131046A (en) 1982-11-24 1983-11-24 Process for manufacturing a fuel briquette

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GB (1) GB2131046A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658835A1 (en) * 1990-02-27 1991-08-30 Fauvel Claude Process for the manufacture of a combustible product, for example a log, and a plant making it possible to use this process and product, for example log, obtained in accordance with this process
WO2007087827A1 (en) * 2005-02-01 2007-08-09 Hans Werner Production of biomass fuel
AU2006337568B2 (en) * 2005-02-01 2010-07-15 Hans Werner Production of biomass fuel

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB347266A (en) * 1930-01-24 1931-04-24 Joseph Onions Improvements in or relating to the manufacture or burning of bricks and the like, and fuel for use therewith
GB389880A (en) * 1931-09-30 1933-03-30 Percy Swaine A new or improved fire-lighter
GB527705A (en) * 1939-03-13 1940-10-15 Albert Edward Drew Improvements in or relating to firelighters
GB565545A (en) * 1943-04-09 1944-11-15 Henry Charles Byrte Improvements in or relating to the manufacture of firelighters
GB584200A (en) * 1944-12-13 1947-01-09 Henry Charles Byrte Improvements in or relating to the manufacture of firelighters
GB2050459A (en) * 1978-05-25 1981-01-07 Gasland S Moulding Paste
GB1585684A (en) * 1978-05-26 1981-03-11 Burco Combustible Products Ltd Synthetic fire logs
GB2104097A (en) * 1981-07-07 1983-03-02 John Henry Stanbury Fuel from spent chicken litter, paper, and wood
GB2119813A (en) * 1982-05-08 1983-11-23 Thomas Henry Gardner Production of synthetic solid fuel

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB347266A (en) * 1930-01-24 1931-04-24 Joseph Onions Improvements in or relating to the manufacture or burning of bricks and the like, and fuel for use therewith
GB389880A (en) * 1931-09-30 1933-03-30 Percy Swaine A new or improved fire-lighter
GB527705A (en) * 1939-03-13 1940-10-15 Albert Edward Drew Improvements in or relating to firelighters
GB565545A (en) * 1943-04-09 1944-11-15 Henry Charles Byrte Improvements in or relating to the manufacture of firelighters
GB584200A (en) * 1944-12-13 1947-01-09 Henry Charles Byrte Improvements in or relating to the manufacture of firelighters
GB2050459A (en) * 1978-05-25 1981-01-07 Gasland S Moulding Paste
GB1585684A (en) * 1978-05-26 1981-03-11 Burco Combustible Products Ltd Synthetic fire logs
GB2104097A (en) * 1981-07-07 1983-03-02 John Henry Stanbury Fuel from spent chicken litter, paper, and wood
GB2119813A (en) * 1982-05-08 1983-11-23 Thomas Henry Gardner Production of synthetic solid fuel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658835A1 (en) * 1990-02-27 1991-08-30 Fauvel Claude Process for the manufacture of a combustible product, for example a log, and a plant making it possible to use this process and product, for example log, obtained in accordance with this process
WO2007087827A1 (en) * 2005-02-01 2007-08-09 Hans Werner Production of biomass fuel
AU2006337568B2 (en) * 2005-02-01 2010-07-15 Hans Werner Production of biomass fuel

Also Published As

Publication number Publication date
GB8331332D0 (en) 1984-01-04

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)