US3800428A - Process for cooling hot briquettes - Google Patents

Process for cooling hot briquettes Download PDF

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Publication number
US3800428A
US3800428A US00260140A US3800428DA US3800428A US 3800428 A US3800428 A US 3800428A US 00260140 A US00260140 A US 00260140A US 3800428D A US3800428D A US 3800428DA US 3800428 A US3800428 A US 3800428A
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US
United States
Prior art keywords
stage
briquettes
cooling
water vapor
hot
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 - Lifetime
Application number
US00260140A
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English (en)
Inventor
E Ahland
E Ratajczak
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.)
Bergwerksverband GmbH
GEA Group AG
Original Assignee
Bergwerksverband GmbH
Metallgesellschaft AG
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 Bergwerksverband GmbH, Metallgesellschaft AG filed Critical Bergwerksverband GmbH
Application granted granted Critical
Publication of US3800428A publication Critical patent/US3800428A/en
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Expired - Lifetime legal-status Critical Current

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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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • 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
    • C10L5/30—Cooling the shaped fuels, e.g. briquettes

Definitions

  • ABSTRACT 30 1 Foreign Apphca Pnomy Data Hot briquettes made from carbonaceous materials are June 18, 1971 Germany 2130066 cooled in at least two Stages using water vapor as the coolant in the first stage and boiling water as the cool- [52] ant in the subsequent stage. Water vapor for the first I /2 stage is generated by immersing the briquettes leaving g 53 3 the first stage in a water bath whereby the resulting 1 3 27223 1 6 2 1 5 R water vapor rises into the first cooling stage.
  • Apparatus for carrying out the process includes shaft [56] References Cited cooler means having continuously operating discharge UNITED STATES PATENTS means, water bath means containing conveyor means and chute means adjacent the conveyor means having 33232;";
  • the invention is particularly applicable to the cooling of briquettes which contain no binder and which consists of or contain coal and are produced by pressing at temperatures of about 400-540 C.
  • Such hot briquettes may be made, for example, in a process in which fine-grained coke heated to temperatures of 600900 C. is mixed with dried caking coal, which can be preheated, if desired, whereby a mixture having a temperature of 400540 C. is formed, and the mixture is briquetted by a roll press or an extruder, without intermediate cooling.
  • the hot binderless briquettes which are usually called hot briquettes, must then be cooled with exclusion of air or in an atmosphere of inert gas or water vapor so that a spontaneous ignition of the briquettes will be avoided.
  • the rate at which the briquettes are cooled must not be excessively high, particularly during the initial cooling period immediately after the briquettes have left the press, if hot briquettes are to be produced which have a very high quality and a very high mechanical strength.
  • a process is already known in which hot briquettes are cooled in two stages with water vapor in the first stage and with cold water in the second stage.
  • the briquettes are cooled in the first stage from about 390 down to 130 C. at a cooling rate of about 20 C. per minute and in the secondstage from about 130 down to 50 C. at a cooling rate of about 8 C. per minute.
  • these temperature ranges and the cooling rates maintained therein do not lead to optimum results in the cooling of hot briquettes.
  • the hot briquettes must be maintained at the pressing temperature or at a lower temperature for a predetermined period of time, which is calculated by a formula dependent on the temperature of the briquettes and-is at least 30 minutes.
  • the briquettes should be treated while at rest in two shafts, which are filled in alternation and through which no gases or vapors are passed.
  • This object is accomplished according to the invention by cooling hot briquettes in a first stage from about 500 C. down to a temperature between about 400 and 450 C. with water vapor flowing countercurrent to the hot briquettes whichdescend continuously in a shaft cooler.
  • This water vapor is generated in a simple manner by immersing the hot briquettes which leave the first stage in a water bath which assumes a temperature of about 100 C.
  • the heat which is transferred by the hot briquettes to the water bath results in an evaporation of water.
  • the resulting water vapor flows upwardly into the'shaft cooler and enables an initially mild cooling of the hot briquettes and a removal of the tar fumes which are evolved.
  • Apparatus of the invention includes shaft cooler means having continuously operating discharge means, water bath means containing conveyor means, and chute means adjacent said conveyor means having spray cooling means associated therewith.
  • the hot briquettes which leave the press are charged to a shaft cooler, by means of interposed conveyors, if desired, and travel through the shaft cooler from top to bottom in a column of bulk material.
  • the briquettes are discharged at a controlled rate by discharge valve means disposed at the lower end of the shaft cooler.
  • the residence time of the briquettes in the first stage should be between about 20 and 80 minutes.
  • the briquettes then fall on a chain conveyor, which is positioned in a water bath. The immersion of the hot briquettes in the enclosed water bath results in a formation of water vapor, which rises in the shaft cooler countercurrent to the hot briquettes.
  • the hot briquettes are cooled by about 80 C. whereas the water vapor is heated approximately to the temperature at which the hot briquettes enter the shaft cooler.
  • the hot briquettes can withstand the sudden cooling in the water bath without a formation of stress cracks.
  • the chain conveyor in the water bath may be operated at a higher speed and the water bath may be maintained on a lower level so that the hot briquettes are immersed only for a very short time of, for example, 5 to 20 seconds.
  • the briquettes are less cooled and are maintained at temperatures of 200 C. and more so that less water vapor is formed and the hot briquettes are even more gently cooled in the shaft cooler.
  • apparatus of the invention is shown to include a shaft cooler 2 for cooling the hot briquettes in a first stage and a water bath 4 for a continued cooling of the briquettes in a second stage.
  • the hot briquettes coming from the press are charged by a feeder 1 into the shaft cooler 2 from the top. As a closely-packed bulk charge, they slowly descend in the shaft cooler and are discharged at a controlled rate by continuously operating discharge valve means 3. The briquettes then fall into the water bath 4 and are discharged from the same by a chain conveyor 5. Thereafter, they move down a chute 7 downstream of conveyor 5 on which they are finally cooled by means of shower heads 6 of the spray cooling means.

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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)
US00260140A 1971-06-18 1972-06-06 Process for cooling hot briquettes Expired - Lifetime US3800428A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2130066A DE2130066C3 (de) 1971-06-18 1971-06-18 Verfahren zum Kühlen von Heißbriketts

Publications (1)

Publication Number Publication Date
US3800428A true US3800428A (en) 1974-04-02

Family

ID=5811011

Family Applications (1)

Application Number Title Priority Date Filing Date
US00260140A Expired - Lifetime US3800428A (en) 1971-06-18 1972-06-06 Process for cooling hot briquettes

Country Status (6)

Country Link
US (1) US3800428A (OSRAM)
JP (1) JPS5439841B1 (OSRAM)
DE (1) DE2130066C3 (OSRAM)
FR (1) FR2141830A1 (OSRAM)
GB (1) GB1336699A (OSRAM)
NL (1) NL7206724A (OSRAM)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953928A (en) * 1975-04-25 1976-05-04 Great Lakes Carbon Corporation Cooling of hot particulate material particularly calcined petroleum coke
US3959084A (en) * 1974-09-25 1976-05-25 Dravo Corporation Process for cooling of coke
US4362532A (en) * 1981-08-11 1982-12-07 Conoco Inc. Production of blast furnace coke via novel briquetting system
US4701243A (en) * 1985-02-21 1987-10-20 Firma Carl Still Gmbh & Co. Kg Method for cooling and dedusting dry cooled coke
US5658357A (en) * 1995-03-21 1997-08-19 The Curators Of The University Of Missouri Process for forming coal compact without a binder
US20060112617A1 (en) * 2003-02-11 2006-06-01 Clark Keith N Briquetting process
US20180340240A1 (en) * 2017-05-26 2018-11-29 Novelis Inc. System and method for briquetting cyclone dust from decoating systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8221824B2 (en) 2005-02-03 2012-07-17 Boston Scientific Scimed, Inc. Deforming surface of drug eluting coating to alter drug release profile of a medical device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB927231A (OSRAM) *
US885308A (en) * 1904-07-01 1908-04-21 Isbell Porter Company Apparatus for the manufacture of gas.
US1006281A (en) * 1909-02-13 1911-10-17 Hans Ries Car for quenching coke.
US2779719A (en) * 1954-04-21 1957-01-29 Exxon Research Engineering Co Quench-elutriator vessel
US3062629A (en) * 1960-09-09 1962-11-06 Little Inc A Lignite char barbecue briquettes and method of making them
US3184293A (en) * 1960-05-24 1965-05-18 Fmc Corp Carbonaceous shapes
US3316155A (en) * 1963-01-25 1967-04-25 Inland Steel Co Coking process
US3635684A (en) * 1969-08-11 1972-01-18 Donald E Seymour Composite fuel article

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB927231A (OSRAM) *
US885308A (en) * 1904-07-01 1908-04-21 Isbell Porter Company Apparatus for the manufacture of gas.
US1006281A (en) * 1909-02-13 1911-10-17 Hans Ries Car for quenching coke.
US2779719A (en) * 1954-04-21 1957-01-29 Exxon Research Engineering Co Quench-elutriator vessel
US3184293A (en) * 1960-05-24 1965-05-18 Fmc Corp Carbonaceous shapes
US3062629A (en) * 1960-09-09 1962-11-06 Little Inc A Lignite char barbecue briquettes and method of making them
US3316155A (en) * 1963-01-25 1967-04-25 Inland Steel Co Coking process
US3635684A (en) * 1969-08-11 1972-01-18 Donald E Seymour Composite fuel article

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959084A (en) * 1974-09-25 1976-05-25 Dravo Corporation Process for cooling of coke
US3953928A (en) * 1975-04-25 1976-05-04 Great Lakes Carbon Corporation Cooling of hot particulate material particularly calcined petroleum coke
US4362532A (en) * 1981-08-11 1982-12-07 Conoco Inc. Production of blast furnace coke via novel briquetting system
US4701243A (en) * 1985-02-21 1987-10-20 Firma Carl Still Gmbh & Co. Kg Method for cooling and dedusting dry cooled coke
US5658357A (en) * 1995-03-21 1997-08-19 The Curators Of The University Of Missouri Process for forming coal compact without a binder
US20060112617A1 (en) * 2003-02-11 2006-06-01 Clark Keith N Briquetting process
US20090025285A1 (en) * 2003-02-11 2009-01-29 Commonwealth Scientific And Industrial Research Organisation Briquetting process
US7892302B2 (en) 2003-02-11 2011-02-22 Commonwealth Scientific And Industrial Research Organisation Briquetting process
US8070839B2 (en) 2003-02-11 2011-12-06 Commonwealth Scientific And Industrial Research Organisation Briquetting process
USRE46052E1 (en) 2003-02-11 2016-07-05 Commonwealth Scientific And Industrial Research Organisation Briquetting process
US20180340240A1 (en) * 2017-05-26 2018-11-29 Novelis Inc. System and method for briquetting cyclone dust from decoating systems

Also Published As

Publication number Publication date
FR2141830A1 (OSRAM) 1973-01-26
DE2130066A1 (de) 1972-12-21
NL7206724A (OSRAM) 1972-12-20
JPS5439841B1 (OSRAM) 1979-11-30
AU4291172A (en) 1973-12-06
GB1336699A (en) 1973-11-07
DE2130066C3 (de) 1982-09-30
DE2130066B2 (de) 1979-02-15

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