US3592617A - Producing smokeless-briquettes from bituminous coal,sub-bituminous coal,or lignite - Google Patents

Producing smokeless-briquettes from bituminous coal,sub-bituminous coal,or lignite Download PDF

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Publication number
US3592617A
US3592617A US823657A US82365769A US3592617A US 3592617 A US3592617 A US 3592617A US 823657 A US823657 A US 823657A US 82365769 A US82365769 A US 82365769A US 3592617 A US3592617 A US 3592617A
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United States
Prior art keywords
briquettes
lignite
coal
bituminous coal
sub
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Expired - Lifetime
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US823657A
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English (en)
Inventor
Sadrettin Alpan
Karl Alfred Jappelt
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Individual
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Individual
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    • 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
    • C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
    • C10L5/28—Heating the shaped fuels, e.g. briquettes; Coking the binders
    • 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
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/08—Methods of shaping, e.g. pelletizing or briquetting without the aid of extraneous binders

Definitions

  • This invention relates to the production of smokelessbriquettes from bituminous coal, sub-bituminous coal, or lignite.
  • Semi-coke is known as a smokeless fuel, made by lowtemperature distillation of coal, which is now sought for burning in households and light industry, to prevent smoke and smog formation in big cities.
  • semi-coke from lignite is a good and cheap fuel with a high reactivity.
  • the grain size is very small. Because of its softness, abrasion during transport is high. It also sometimes tends to ignite spontaneously when kept in stock. For these reasons many eiforts have been made to improve its properties, especially the grain size of such semi-coke.
  • Exter press (invented by Exter over years ago and used in Germany for briquetting of lignite), which easily makes possible a longer pressing time during the supplementary heating and it also regulates the pressure by means of the length of its press-channel and its dimensions.
  • a square channel can be formed so that quick heat-transfer is possible.
  • the channel can also easily be heated electrically, if it is made of stainless steel, and, for example, connected with a power source that is low in voltage but high in current. This kind of electrical heating is possible without any changing of the construction of the common Exter press used for the classical method of briquetting brown coal.
  • the temperature of the lignite in the channel can be easily regulated in this way.
  • the low-temperature-distillation gas which still escapes from the preheated lignite in the pressure-channel may, for example, be exhausted through a hole in the bri quette.
  • This hole in each briquette cooperates with holes in other briquettes to a tube beginning with the first briquette and ending with the last briquette of the channel.
  • the stamper may have a plug on its plate in the center to cause the hole in the briquette.
  • the drawing is a flow sheet of a preferred form of the process of this invention.
  • Lignite for example, that denoted by international code No. 1200, having a moisture of 40% and considerable volatile matter is sent to a fluidized-bed oven for speedily evaporating the water content to less than 20%.
  • the predried coal flows to the stage where it is completely dried and heated, for example, up to about 410 C.
  • Hot combustion gas free of oxygen is mixed with recirculating gas at a temperature of 900 C. produced in a furnace, and first enters the lower stage and then passes the upper stage with a temperature of about 500 C. It leaves the fluidized-bed oven with a temperature of about 220 C.
  • the gas After precipitating the dust from the gas as by a cyclone, the gas may be cooled to approximately 60 C. in a cooler and partly sent to the combustion chamber by means of a blower. The rest is used for output.
  • the preheated coal flows from the fluidized-bed oven to an intermediate bunker. From here it enters an Exter press by means of an inlet.
  • the stamper moves the preheated lignite through the heated pressing channel, which is long enough to increase the temperature of the coal under pressure until no further tar vapours escape.
  • Coke briquettes and low-temperature distillation gas leave the press outlet. Afterwards, the briquettes are cooled by air or by Water-spraying, in the common way.
  • lignite did not become plastic enough during the short normal pressing time, therefore bituminous or sub-bituminous coal was added
  • the new process allows pressing of all kinds of coal without any mixing, except anthracite and xylite. (Xylite is found more or less in all kinds of lignite and looks like wood.)
  • the quality of the briquettes can be easily varied by changing the pre-heating temperature or the temperature under pressure, or the pressing time and the pressure. So it is possible to produce all kinds of briquettes which are in demand in the market.
  • a process for producing smokeless briquettes from bituminous or sub-bituminous coal or lignite by hot-briquetting comprising speedily drying the coal or lignite, preheating it to 340 420 C. without pressure, compress-v ing it into briquettes and finally heating the briquettes while holding them under pressure until the tar vapours have completely escaped.

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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)
  • Coke Industry (AREA)
US823657A 1968-05-11 1969-05-12 Producing smokeless-briquettes from bituminous coal,sub-bituminous coal,or lignite Expired - Lifetime US3592617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2574068 1968-05-11

Publications (1)

Publication Number Publication Date
US3592617A true US3592617A (en) 1971-07-13

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ID=21620521

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US823657A Expired - Lifetime US3592617A (en) 1968-05-11 1969-05-12 Producing smokeless-briquettes from bituminous coal,sub-bituminous coal,or lignite

Country Status (5)

Country Link
US (1) US3592617A (de)
BG (1) BG16044A3 (de)
CS (1) CS171203B2 (de)
DE (1) DE1912264A1 (de)
YU (1) YU33206B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950143A (en) * 1972-07-14 1976-04-13 The Kingsford Company Process for producing solid industrial fuel
US3980447A (en) * 1972-04-26 1976-09-14 Rheinische Braunkohlenwerke Ag Process for the manufacture of brown coal briquettes
US4161825A (en) * 1977-03-08 1979-07-24 Uop Inc. Plasticized organic waste
US4508539A (en) * 1982-03-04 1985-04-02 Idemitsu Kosan Company Limited Process for improving low quality coal
US6443077B1 (en) * 2000-07-14 2002-09-03 Kubota Co., Ltd. System for producing combustion ash of cellulose-containing wastes
RU2661881C1 (ru) * 2018-04-20 2018-07-20 Сергей Иванович Цыбульский Способ брикетирования угля

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980447A (en) * 1972-04-26 1976-09-14 Rheinische Braunkohlenwerke Ag Process for the manufacture of brown coal briquettes
US3950143A (en) * 1972-07-14 1976-04-13 The Kingsford Company Process for producing solid industrial fuel
US4161825A (en) * 1977-03-08 1979-07-24 Uop Inc. Plasticized organic waste
US4508539A (en) * 1982-03-04 1985-04-02 Idemitsu Kosan Company Limited Process for improving low quality coal
US6443077B1 (en) * 2000-07-14 2002-09-03 Kubota Co., Ltd. System for producing combustion ash of cellulose-containing wastes
RU2661881C1 (ru) * 2018-04-20 2018-07-20 Сергей Иванович Цыбульский Способ брикетирования угля

Also Published As

Publication number Publication date
YU55869A (en) 1975-12-31
DE1912264A1 (de) 1969-11-20
BG16044A3 (bg) 1972-05-20
CS171203B2 (de) 1976-10-29
YU33206B (en) 1976-06-30

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