US3686773A - Material cooler - Google Patents

Material cooler Download PDF

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Publication number
US3686773A
US3686773A US146368A US3686773DA US3686773A US 3686773 A US3686773 A US 3686773A US 146368 A US146368 A US 146368A US 3686773D A US3686773D A US 3686773DA US 3686773 A US3686773 A US 3686773A
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US
United States
Prior art keywords
section
cooling air
heat exchanger
cooler
grate
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
US146368A
Other languages
English (en)
Inventor
Paul Schreiner
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.)
Fuller Co
Original Assignee
Fuller Co
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 DE19702026261 external-priority patent/DE2026261C/de
Application filed by Fuller Co filed Critical Fuller Co
Application granted granted Critical
Publication of US3686773A publication Critical patent/US3686773A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0071—Use of a comminuting device, e.g. grinding mill
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases or liquids
    • F27D2007/026—Dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/007—Cooling of charges therein
    • F27D2009/0081—Cooling of charges therein the cooling medium being a fluid (other than a gas in direct or indirect contact with the charge)
    • F27D2009/0083—Cooling of charges therein the cooling medium being a fluid (other than a gas in direct or indirect contact with the charge) the fluid being water
    • F27D2009/0086—Cooling of charges therein the cooling medium being a fluid (other than a gas in direct or indirect contact with the charge) the fluid being water applied in spray form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F27D2015/024—Multiple grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F27D2015/0246—Combination of fixed and movable grates
    • F27D2015/0253—Gradin grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F27D2015/026—Means to discharge the fines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
    • F27D21/0035—Devices for monitoring the weight of quantities added to the charge
    • F27D2021/0042—Monitoring the level of the solid charge

Definitions

  • each of the sections includes an arrangement such as a series of alternately fixed and movable grates for moving material from the inlet of the section to the outlet of the section.
  • a material breaker is positioned between the initial heat exchanger section and the second heat exchanger section.
  • a material lock is provided between each section. The material is cooled by air flowing upwardly through the grate and material. Cooling air is introduced into a plenum chamber beneath the last section, flows upwardly through the material in that section and through the material in the succeeding sections and is eventually sent to the furnace as heated combustion air. Before passing through the initial section, water may be sprayed into the air to cool the same.
  • This invention relates to a cooler for hot or burning material with a large number of cooling grates divided into a plurality of grate sections through which the material passes one after the other, whereby the cooling air of the first grate section can be conducted into the burning furnace as combustion air.
  • the invention is particularly suited to cooling cement clinker discharged from a rotary kiln.
  • the cooling air of the first grate section is supplied to the furnace as secondary air, or the cooling air first flows through the second cooler section in order to chill the hot material which is located there, and it then flows through the first cooler section from which it is conducted to the furnace.
  • the cooling air of the second grate section is blown off into the atmosphere, which results in heat losses and necessitates the use of dust collection apparatus before being discharged to atmosphere.
  • the cooling air flows through the two grate sections in a direct current, i.e., through the hottest material first and then through the cooler material.
  • a direct current i.e., through the hottest material first and then through the cooler material.
  • the cooling air which is conducted through the grates in a direction countercurrent to the flow of material, reaches the first grate section with an already comparatively high temperature, so that it cannot achieve the cooling affects required for the protection of the grate material used in the first stage.
  • the invention is intended, in spite of the conditions described, to create a cooler for burning material of the type mentioned in the beginning, where the cooling medium can flow through the grate sections countercurrent to the flow of material.
  • That a material breaker is arranged between the first and second grate sections, looking in the direction of movement of the material;
  • That devices are provided for the introduction of water into the cooling air current before the latter flows through the first grate section.
  • the devices for the introduction of the water are best made in the form of spray nozzles positioned in the upper chamber of the second grate section.
  • the cooling in the first grate section and especially the adequate cooling of the grate in the highly-stressed first part of this grate section, as well as the chilling of the material dropped from the furnace can be achieved if a first part of the first grate section is hit with cold cooling air.
  • FIGURE is a schematic longitudinal.cross-section of the present invention.
  • the cooler sections 2 and 3 are preferably horizontal coolers such as those shown in U.S. Pat. Nos. 2,846,778; 3,197,887; or 3,358,385.
  • the beginning of the first grate sections 1 lies under the shaft 4 into which opens the discharge end 5 of a furnace such as a rotary kiln.
  • a breaker 6 of any suitable design that can be operated at the temperatures prevailing there is positioned at the end of the first grate section.
  • the material dropped by the breaker is moved into a material lock shaft 7 which is made between the outside wall 8 and a separating wall 9.
  • the separating wall 9 has a slide member 10 positioned at its lower end which can be adjusted for regulatory purposes during operation of the apparatus or can be fixed.
  • Two level measurement members 11 are positioned in the lock shaft 7 of which the lower one is place so high that the lock effect is still guaranteed when the filling level is just slightly below this member.
  • the lock shaft 7 opens at the beginning of grate section 2.
  • a material lock shaft 12 is positioned at the discharge end of section 2 and is likewise equipped with level measurement members 13 similar to members 11.
  • the partition 14 which forms part of the shaft 12 is equipped with a slide element 15 which corresponds to the element 10 in terms of arrangement and operation.
  • the shaft 12 empties above the beginning of grate section 3 which terminates in a third lock shaft 16 which is also equipped with level measurement members 17 which control discharge members indicated in the drawing as double butterfly valves 18 so that the lock shaft 16 will constantly be so filled that the lock effect will be guaranteed. If the force-controlled discharge members themselves have enough of a lock effect, the plug-effect of the material which accumulates in shaft 16 can be reduced or eliminated.
  • Cooling air is supplied to the lower chamber of grate 3 by means of a blower 19.
  • This lower chamber is limited on the underside by funnels 20 which catch the material falling through the grate and these funnels are likewise provided with discharge locks which are indicated in the example as double butterfly valves 21 which, in turn, can be controlled by level measurement members 22.
  • the lower chamber can be divided into compartments by suitable partitions with a separate blower supplying cooling air to each compartment.
  • the level measurement members which in each case are arranged in pairs, work in such a manner that the material is discharged as soon as the upper level measurement member has been reached, while the discharge operation is stopped as soon as the filling level drops to the lower level measurement member.
  • the level measurement members 11 and 13 in look shafts 7 and 12 serve to regulate the material level in such a manner that there will always be enough filling material in these layers. They can act either upon the slide members 10 and 15, respectively, and/or upon the drive of the grate sections 2, respectively 3, for the purpose of adjusting their speed and thereby adjusting the rate at which material is moved through the heat exchanger sections.
  • the lock shafts insure that cooling air flows through the grates and material supported thereon and is not short-circuited around the material.
  • the cooler housing which encloses the three grate sections, is completely closed with the exception of shaft 4.
  • the pressure of the cooling air, conveyed by blower 19, drops in three stages while passing through grate sections 3, 2, and 1, until it has reached in the upper chamber of grate section 1 the pressure at the furnace outlet which is near atmospheric pressure.
  • Water spray nozzles 25 run into the lower chamber of the first grate section.
  • the injected water gives the cooling air current the moisture content desired for the secondary air and furthermore so reduces the temperature of the cooling air current that sufficient cooling is achieved in the first grate section.
  • the spraying of water can be regulated as a function of the secondary air temperature and/or the clinker terminal temperature. Both temperatures are reduced as a result of the injection of water.
  • a cooler for hot material including a plurality of heat exchanger sections through which material to be cooled sequentially passes whereby cooling air which is heated by the hot material can be returned to a furnace as combustion air, the improvement comprising:
  • a plurality of flow connected heat exchangers each including means for supporting the material to be cooled and advancing said material through the heat exchanger;
  • said means for introducing water includes means for spraying water into the cooling air just prior to the cooling air passing through the heat exchanger containing the hottest material.
  • the cooler according to claim 1 further comprising means for supplying additional cooling air directly to the heat exchanger which receives the hot material to be cooled at the point nearest the point hot material flows into the cooler from a furnace. 5

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
US146368A 1970-05-29 1971-05-24 Material cooler Expired - Lifetime US3686773A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702026261 DE2026261C (de) 1970-05-29 Kühler für Brenngut mit einer Mehrzahl nacheinander von dem Gut passierter Kühlroste

Publications (1)

Publication Number Publication Date
US3686773A true US3686773A (en) 1972-08-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US146368A Expired - Lifetime US3686773A (en) 1970-05-29 1971-05-24 Material cooler

Country Status (2)

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US (1) US3686773A (de)
AT (1) AT301431B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839803A (en) * 1973-01-30 1974-10-08 Fuller Co Method and apparatus for cooling hot particulate material
US3892044A (en) * 1973-02-14 1975-07-01 Peters Ag Claudius Method and apparatus for cooling
US3922797A (en) * 1973-01-30 1975-12-02 Fuller Co Method for cooling hot particulate material
US4763572A (en) * 1987-04-13 1988-08-16 Kuehl Lawrence J Apparatus for removing moisture from honey
US6055741A (en) * 1997-12-01 2000-05-02 Kundert Ingeniure Ag Apparatus for draining washed products, particularly agricultural products
WO2001002786A1 (en) * 1999-06-07 2001-01-11 Reed Steven C Sr Method and apparatus for drying grain
US20110000651A1 (en) * 2007-12-13 2011-01-06 Gerd Wurster Cooling apparatus and method for cooling objects from a coating device
WO2012013684A1 (de) * 2010-07-29 2012-02-02 Lintec Gmbh & Co. Kg Mobile vorrichtung und verfahren zur betonherstellung mit kühlung von schüttgut
US20170261205A1 (en) * 2014-09-16 2017-09-14 Hitachi Zosen Inova Ag Method and device for processing slag occurring in a combustion chamber of a refuse incineration plant
US20210323864A1 (en) * 2018-09-10 2021-10-21 Thyssenkrupp Industrial Solutions Ag Cooler for cooling clinker and method for operating a cooler for cooling clinker
US20230286191A1 (en) * 2020-07-03 2023-09-14 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Apparatus and method for cooling of fresh concrete

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1535804A (en) * 1923-10-13 1925-04-28 Raymond Bros Engineering Co Drying apparatus
US2407636A (en) * 1944-05-12 1946-09-17 Rebecca George Thompson Drier
US3060589A (en) * 1958-03-25 1962-10-30 Svenska Flaektfabriken Ab Drying granular materials
US3162431A (en) * 1961-04-07 1964-12-22 Kloeckner Humboldt Deutz Ag Method and means for improving electric precipitation of dust from kiln waste gases

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1535804A (en) * 1923-10-13 1925-04-28 Raymond Bros Engineering Co Drying apparatus
US2407636A (en) * 1944-05-12 1946-09-17 Rebecca George Thompson Drier
US3060589A (en) * 1958-03-25 1962-10-30 Svenska Flaektfabriken Ab Drying granular materials
US3162431A (en) * 1961-04-07 1964-12-22 Kloeckner Humboldt Deutz Ag Method and means for improving electric precipitation of dust from kiln waste gases

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922797A (en) * 1973-01-30 1975-12-02 Fuller Co Method for cooling hot particulate material
US3839803A (en) * 1973-01-30 1974-10-08 Fuller Co Method and apparatus for cooling hot particulate material
US3892044A (en) * 1973-02-14 1975-07-01 Peters Ag Claudius Method and apparatus for cooling
US4763572A (en) * 1987-04-13 1988-08-16 Kuehl Lawrence J Apparatus for removing moisture from honey
US6055741A (en) * 1997-12-01 2000-05-02 Kundert Ingeniure Ag Apparatus for draining washed products, particularly agricultural products
WO2001002786A1 (en) * 1999-06-07 2001-01-11 Reed Steven C Sr Method and apparatus for drying grain
US6230421B1 (en) * 1999-06-07 2001-05-15 Steven C. Reed, Sr. Method and apparatus for drying grain
US8286365B2 (en) * 2007-12-13 2012-10-16 Gerd Wurster Cooling apparatus and method for cooling objects from a coating device
US20110000651A1 (en) * 2007-12-13 2011-01-06 Gerd Wurster Cooling apparatus and method for cooling objects from a coating device
CN103180114A (zh) * 2010-07-29 2013-06-26 琳得科有限两合公司 通过冷却松散材料来制造混凝土的方法和移动式设备
WO2012013684A1 (de) * 2010-07-29 2012-02-02 Lintec Gmbh & Co. Kg Mobile vorrichtung und verfahren zur betonherstellung mit kühlung von schüttgut
US20130213060A1 (en) * 2010-07-29 2013-08-22 Lintec Gmbh & Co. Kg Mobile apparatus and method for producing concrete with cooling of bulk material
TWI447008B (zh) * 2010-07-29 2014-08-01 Lintec Gmbh & Co Kg 具有大量原料之冷卻之生產混凝土之可移動裝置及方法
CN103180114B (zh) * 2010-07-29 2015-07-01 琳得科有限两合公司 通过冷却松散材料来制造混凝土的方法和移动式设备
US9505146B2 (en) * 2010-07-29 2016-11-29 Lintec Gmbh & Co. Kg Mobile apparatus and method for producing concrete with cooling of bulk material
US20170261205A1 (en) * 2014-09-16 2017-09-14 Hitachi Zosen Inova Ag Method and device for processing slag occurring in a combustion chamber of a refuse incineration plant
US10180254B2 (en) * 2014-09-16 2019-01-15 Hitachi Zosen Inova Ag Method and device for processing slag occurring in a combustion chamber of a refuse incineration plant
US20210323864A1 (en) * 2018-09-10 2021-10-21 Thyssenkrupp Industrial Solutions Ag Cooler for cooling clinker and method for operating a cooler for cooling clinker
US12162808B2 (en) * 2018-09-10 2024-12-10 thyssenkrupp Polysius GmbH Cooler for cooling clinker and method for operating a cooler for cooling clinker
US20230286191A1 (en) * 2020-07-03 2023-09-14 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Apparatus and method for cooling of fresh concrete

Also Published As

Publication number Publication date
AT301431B (de) 1972-09-11
DE2026261A1 (de) 1971-12-02
DE2026261B2 (de) 1972-12-28

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