US3282514A - Method for controlling the amount of liquid added to heat absorbing gases - Google Patents

Method for controlling the amount of liquid added to heat absorbing gases Download PDF

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Publication number
US3282514A
US3282514A US351144A US35114464A US3282514A US 3282514 A US3282514 A US 3282514A US 351144 A US351144 A US 351144A US 35114464 A US35114464 A US 35114464A US 3282514 A US3282514 A US 3282514A
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United States
Prior art keywords
gas
amount
water
temperature
gases
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Expired - Lifetime
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US351144A
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English (en)
Inventor
Putz Rudolf
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GEA Group AG
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Metallgesellschaft AG
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/014—Addition of water; Heat exchange, e.g. by condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/007—Dust filtering; Exhaust dust filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0605—Control of flow characterised by the use of electric means specially adapted for solid materials

Definitions

  • Jnremor- Kaila (7L 7241f United States Patent 3,282,514 METHOD FOR CONTROLLING THE AMOUNT OF LIQUID ADDED TO HEAT ABSORBING GASES Rudolf Putz, Frankfurt am Main, Germany, assignor to Metalitician Aktiengesellschaft, Frankfurt am Main, Germany Filed Mar. 11, 1964, Ser. No. 351,144 Claims priority, application Germany, Mar. 12, 1963,
  • This invention relates to a method of controlling the amount of liquid added to a gas used to absorb heat, and in particular, to a gas used to absorb heat generated during a grinding of a material.
  • a liquid such as water
  • the amount of liquid added for absorbing heat generated during grinding has been less than that required to saturate the gases so that the gases are able to take up moisture for the purpose of drying a material when occasion arises.
  • the gases which have been used in the grinding mill are cleaned in dust separators which follow those grinding mills and which are preferably electrostatic dust precipitators. These electrostatic precipitators react strongly to changes in temperature and dew point of the dust-laden gases, and consequently, the amount of dust removed from the gases varies considerably.
  • the object of this invention is to produce a method for controlling the amount of liquid added to grinding mills followed by an electrostatic or mechanical dust precipitator.
  • the water is added for the purpose of absorbing 3,282,514 Patented Nov. 1, 1956 ice heat generated by the grinding of the material, so as to humidity the gas at a value most favorable for operation of the grinding mill as well as the separator.
  • the amount of moisture added to the gas is dependent upon and controlled by the temperature difference between the temperature and the dew point of the heated waste gas.
  • a further feature of the invention lies in that the gas temperature and the gas dew point temperature are measured in the form of electrical energy which is led to a control element.
  • This control element if desired, actuates a valve control motor for metering the amount of water which is to be added to the gas.
  • the method of this invention consequently has the advantages of controlling the amount of added water to the waste gases in dependence upon both the temperature of the waste gas and dew point of the gas, but avoids the disadvantage of using either of those controls alone.
  • the grinding mill 1 receives through a chute 2 the raw material on conveyor belt 3.
  • the material on the belt can be pre-moistened by water issuing through spray nozzle 4.
  • An opening 5 in the grinding mill 1 provides for the entrance of hot drying gases if necessary.
  • Liquid is added to the gases by being introduced into the grinding mill through spray nozzles 6.
  • the treated material is discharged through hopper 7 while the hot dust-laden gases leave the grinding mill through opening 8.
  • Nozzles 6 are supplied with water by means of pipe lines 9 which include a control or metering valve 10.
  • the water issuing through nozzles 6 can be given an increased atomizin-g by means of air introduced through compressed air pipes 11. Hot gases passing through opening 8 are led through duct 12 to an electrostatic dust precipitator 13.
  • thermocouples 14 and 15 located in the clean gas line duct 16.
  • the clean gas is discharged into the atmosphere by means of blower 17 and chimney 18.
  • the temperature values from thermocouples 14 and 15 are passed through electrical amplifiers 14 and 15, respectively, and this current led to a control device 19.
  • thermocouples 14 and 15 are compared in device 19 and their differences per unit of time evaluated. Inasmuch as one temperature value may fluctuate widely with respect to the other, the differences in the temperature values in the form of electric pulses are sent to a time relay 20 in order to be averaged for a period of time. Then, depending upon the values in time delay relay 20, a signal is either sent to the control relay 21 for starting motor 23 by closing switch 24 or for reversing or stopping the motor by sending a pulse to control relay 22. Motor 23 will then either open valve 19 for admitting more water into mill 1 or for reducing the flow of water in accordance with the dew point required therein.
  • valve 10 is always set to a position dependent upon the difference between the temperature of the hot waste gas and the dew point of the waste gas. Should more water he required in a given period of time, then a pulse from device 19 energizes servo motor 25 to close the throttle valve 26 in duct 12 so that the gases in mill 1 can accumulate more water with a raised dew point before they are released into filter 13. Thus the flow of the gases in duct 12 is made dependent upon the difference between the temperature and dew point of the hot waste gases.
  • the improvement further comprising measuring the difference between the temperature and the dew point of the hot gas in the form of electrical energy, and then using said energy to actuate a motor 10 controlled valve in the Water supply line for the water added to said gas.
  • said separator comprising an electrostatic dust precipitator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Disintegrating Or Milling (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crushing And Grinding (AREA)
US351144A 1963-03-12 1964-03-11 Method for controlling the amount of liquid added to heat absorbing gases Expired - Lifetime US3282514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM56078A DE1227769B (de) 1963-03-12 1963-03-12 Verfahren zur Regelung des Gaszustandes in Muehlen

Publications (1)

Publication Number Publication Date
US3282514A true US3282514A (en) 1966-11-01

Family

ID=7308488

Family Applications (1)

Application Number Title Priority Date Filing Date
US351144A Expired - Lifetime US3282514A (en) 1963-03-12 1964-03-11 Method for controlling the amount of liquid added to heat absorbing gases

Country Status (6)

Country Link
US (1) US3282514A (xx)
BE (1) BE644935A (xx)
CH (1) CH421671A (xx)
DE (1) DE1227769B (xx)
GB (1) GB1002626A (xx)
NL (1) NL6402491A (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373944A (en) * 1966-02-24 1968-03-19 Bethlehem Steel Corp Method and apparatus for controlling consistency
US3923254A (en) * 1972-12-04 1975-12-02 Smidth & Co As F L Cement mill and method of starting same
US3989482A (en) * 1971-06-11 1976-11-02 Polysius Ag Method for the removal of dust from exhaust gases
US4400184A (en) * 1979-05-18 1983-08-23 Hitachi Shipbuilding And Engineering Company Limited System for recovering pressure and sensible heat from blast furnace gas with use of dry-type dust collector
US4642127A (en) * 1980-08-28 1987-02-10 Sumitomo Metal Industries, Ltd. Method for cooling blast furnace gas in an heat recovery system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3108968A1 (de) * 1981-03-10 1982-09-30 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur optimierung der abscheideleistung eines elektrofilters
DE3227543C3 (de) * 1982-07-23 1994-11-24 Thyssen Industrie Vorrichtungen zur Verbesserung der Staubabscheidung in Elektrofiltern
DE19909222A1 (de) * 1999-03-03 2000-09-07 Goergens Hermann Josef Verfahren und Vorrichtung zur Regelung der Temperatur in einem Turbo-Rotor
CN105806077A (zh) * 2014-12-31 2016-07-27 上海泽玛克敏达机械设备有限公司 一种褐煤干燥系统
CN110614152B (zh) * 2019-11-11 2024-03-26 西安科技大学 一种煤样研磨装置及煤样研磨实验装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1429973A (en) * 1920-04-29 1922-09-26 Charles Tagliabue Mfg Co Humidity controller
US1820734A (en) * 1929-01-09 1931-08-25 Siemens Ag Gas purifying plant
DE545426C (de) * 1929-04-20 1932-02-29 Siemens Schuckertwerke Akt Ges Einrichtung zur selbsttaetigen Befeuchtung, insbesondere elektrisch zu reinigender heisser Gase
FR739811A (fr) * 1931-07-09 1933-01-17 Siemens Ag Procédé de traitement préalable des gaz destinés à être épurés par voie électrique
US1909825A (en) * 1928-08-01 1933-05-16 Int Precipitation Co Electrical gas purification
US2019291A (en) * 1933-04-29 1935-10-29 Air Conditioning Systems Inc Air conditioning system
US2060375A (en) * 1931-11-03 1936-11-10 Lyuho S Ishimura Making lead powder
US3186648A (en) * 1963-05-27 1965-06-01 Grace W R & Co Fluid energy mill
US3210058A (en) * 1964-03-06 1965-10-05 Oliver D Colvin Carburetor deicing device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB337448A (xx) * 1929-01-09 1930-10-31 Siemens-Schuckertwerke Aktiengesellschaft
DE545603C (de) * 1929-01-10 1932-03-07 Siemens Schuckertwerke Akt Ges Vorbehandlung von elektrisch zu reinigenden Gasen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1429973A (en) * 1920-04-29 1922-09-26 Charles Tagliabue Mfg Co Humidity controller
US1909825A (en) * 1928-08-01 1933-05-16 Int Precipitation Co Electrical gas purification
US1820734A (en) * 1929-01-09 1931-08-25 Siemens Ag Gas purifying plant
DE545426C (de) * 1929-04-20 1932-02-29 Siemens Schuckertwerke Akt Ges Einrichtung zur selbsttaetigen Befeuchtung, insbesondere elektrisch zu reinigender heisser Gase
FR739811A (fr) * 1931-07-09 1933-01-17 Siemens Ag Procédé de traitement préalable des gaz destinés à être épurés par voie électrique
US2060375A (en) * 1931-11-03 1936-11-10 Lyuho S Ishimura Making lead powder
US2019291A (en) * 1933-04-29 1935-10-29 Air Conditioning Systems Inc Air conditioning system
US3186648A (en) * 1963-05-27 1965-06-01 Grace W R & Co Fluid energy mill
US3210058A (en) * 1964-03-06 1965-10-05 Oliver D Colvin Carburetor deicing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373944A (en) * 1966-02-24 1968-03-19 Bethlehem Steel Corp Method and apparatus for controlling consistency
US3989482A (en) * 1971-06-11 1976-11-02 Polysius Ag Method for the removal of dust from exhaust gases
US3923254A (en) * 1972-12-04 1975-12-02 Smidth & Co As F L Cement mill and method of starting same
US4400184A (en) * 1979-05-18 1983-08-23 Hitachi Shipbuilding And Engineering Company Limited System for recovering pressure and sensible heat from blast furnace gas with use of dry-type dust collector
US4642127A (en) * 1980-08-28 1987-02-10 Sumitomo Metal Industries, Ltd. Method for cooling blast furnace gas in an heat recovery system

Also Published As

Publication number Publication date
BE644935A (xx) 1964-07-01
DE1227769B (de) 1966-10-27
NL6402491A (xx) 1964-09-14
CH421671A (de) 1966-09-30
GB1002626A (en) 1965-08-25

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