SE9803868L - Ways of controlling the supply of conditioners to an electrostatic precipitator - Google Patents

Ways of controlling the supply of conditioners to an electrostatic precipitator

Info

Publication number
SE9803868L
SE9803868L SE9803868A SE9803868A SE9803868L SE 9803868 L SE9803868 L SE 9803868L SE 9803868 A SE9803868 A SE 9803868A SE 9803868 A SE9803868 A SE 9803868A SE 9803868 L SE9803868 L SE 9803868L
Authority
SE
Sweden
Prior art keywords
length
height
time
combination
frequency
Prior art date
Application number
SE9803868A
Other languages
Swedish (sv)
Other versions
SE513114C2 (en
SE9803868D0 (en
Inventor
Torsten Persson
Original Assignee
Flaekt Ab
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 Flaekt Ab filed Critical Flaekt Ab
Priority to SE9803868A priority Critical patent/SE513114C2/en
Publication of SE9803868D0 publication Critical patent/SE9803868D0/en
Publication of SE9803868L publication Critical patent/SE9803868L/en
Publication of SE513114C2 publication Critical patent/SE513114C2/en

Links

Classifications

    • 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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor
    • 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
    • B03C3/013—Conditioning by chemical additives, e.g. with SO3

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrostatic Separation (AREA)

Abstract

For each of frequency-height-length combination for the current pulse a first time is determined for the end of the pulse, and a second time is determined for when the voltage between the emission and precipitation electrodes falls to a given level. The length of the interval between these two times is used to determine an optimum frequency-height-length combination, and the length of the time interval in this combination is used to regulate the supply of conditioning agent added to the gas. An electrostatic separation process for purifying a gas comprises applying a periodically varying high voltage between emission and precipitation electrodes using a pulsed dc current, and regulating the addition of conditioning agents to the gas upstream from the separator unit. The frequency, pulse height and/or pulse length for the dc current are varied in order to give a number of frequency-height-length combinations. For each of these combinations a first time is determined for the end of a delivered current pulse, and a second time is determined for when the voltage between the emission and precipitation electrodes falls to a given level. The length of the interval between these two times is calculated and then used to determine an optimum frequency-height-length combination. The supply of conditioning agent is dependent on the length of the time interval in the optimum combination.
SE9803868A 1998-11-12 1998-11-12 Electrostatic separation process, uses calculated optimum combinations of current pulse frequency, height and length to regulate addition of conditioning agent to gas SE513114C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9803868A SE513114C2 (en) 1998-11-12 1998-11-12 Electrostatic separation process, uses calculated optimum combinations of current pulse frequency, height and length to regulate addition of conditioning agent to gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9803868A SE513114C2 (en) 1998-11-12 1998-11-12 Electrostatic separation process, uses calculated optimum combinations of current pulse frequency, height and length to regulate addition of conditioning agent to gas

Publications (3)

Publication Number Publication Date
SE9803868D0 SE9803868D0 (en) 1998-11-12
SE9803868L true SE9803868L (en) 2000-05-13
SE513114C2 SE513114C2 (en) 2000-07-10

Family

ID=20413263

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9803868A SE513114C2 (en) 1998-11-12 1998-11-12 Electrostatic separation process, uses calculated optimum combinations of current pulse frequency, height and length to regulate addition of conditioning agent to gas

Country Status (1)

Country Link
SE (1) SE513114C2 (en)

Also Published As

Publication number Publication date
SE513114C2 (en) 2000-07-10
SE9803868D0 (en) 1998-11-12

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