WO1998011992A1 - Elimination des matieres particulaires respirables presentes dans les gaz brules - Google Patents

Elimination des matieres particulaires respirables presentes dans les gaz brules Download PDF

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Publication number
WO1998011992A1
WO1998011992A1 PCT/US1997/016323 US9716323W WO9811992A1 WO 1998011992 A1 WO1998011992 A1 WO 1998011992A1 US 9716323 W US9716323 W US 9716323W WO 9811992 A1 WO9811992 A1 WO 9811992A1
Authority
WO
WIPO (PCT)
Prior art keywords
particles
gas stream
particle size
size distribution
fine particles
Prior art date
Application number
PCT/US1997/016323
Other languages
English (en)
Inventor
Sanborn F. Philp
Helmut I. Midle
Original Assignee
Philp Sanborn F
Midle Helmut I
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 Philp Sanborn F, Midle Helmut I filed Critical Philp Sanborn F
Publication of WO1998011992A1 publication Critical patent/WO1998011992A1/fr

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
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B03C3/0175—Amassing particles by electric fields, e.g. agglomeration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/02—Amassing the particles, e.g. by flocculation
    • B01D51/04—Amassing the particles, e.g. by flocculation by seeding, e.g. by adding particles
    • 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
    • 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/025—Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations
    • 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
    • B03C3/155—Filtration

Definitions

  • particle size (approximately) from .2 ⁇ to l ⁇ is a particular
  • the concentration of fine particles may be any concentration of fine particles.
  • Plant exhausts can contain
  • Electrostatic precipitation is a widely used conventional
  • electrostatic precipitation process electrically charges the
  • the electric field causes ions in the gas to drift
  • the charged particles are swept across the exhaust duct and out of the gas stream, where they are captured on
  • transverse collecting field is a parameter of fundamental
  • the particles have a
  • Diffusion charging occurs at a rate
  • emitted fraction might be on the order of 30% for fine
  • entrained particle in an electrostatic precipitator is on the order of 2 to 10 seconds.
  • the agglomeration process could be greatly accelerated if
  • the small particles to be agglomerated were of oppositely
  • bipolar agglomeration was inferior to the symmetrical case.
  • outlet section are separated from the fines and prepared for
  • the present invention relates to an apparatus and
  • agglomerated particles are then removed from the gas stream by
  • Figure 1 is a graph showing the theoretical migration
  • Figure 2 is a graph of collection efficiency for various
  • Figure 3 is a graph of density, surface and mass
  • Figure 4 is a graph of expected particle size
  • Figure 5 is a block diagram of an agglomeration system in
  • Figure 6 is a schematic diagram of an agglomeration
  • Figure 7 is a cross-sectional view of means for achieving
  • the large scavenger particles can be charged positive by
  • Scavenger particles might be obtained from sources
  • Figure 5 shows a system where
  • fly-ash particles are collected from the hoppers of section
  • ESP No. I is not necessarily limited to the first ESP
  • ESP No. II can be more than one ESP section. Utilizing
  • Scavenging particles also could be made of carbon or
  • Fines entrained in a gas stream flow through the various
  • discharge wires are typically very far apart from each other
  • particle-agglomeration scheme includes the recovery and re-use

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrostatic Separation (AREA)

Abstract

Appareil et procédé permettant d'agglomérer les particules fines présentes dans un écoulement de gaz. Les particules plus grosses sont introduites dans l'appareil et on leur applique une charge électrique d'une polarité opposée à la charge appliquée aux particules fines à agglomérer. La différence de polarité de la charge entraîne les particules fines à s'agglomérer sur les particules plus grosses, les particules agglomérées résultantes étant ensuite éliminées de l'écoulement de gaz par précipitation.
PCT/US1997/016323 1996-09-20 1997-09-17 Elimination des matieres particulaires respirables presentes dans les gaz brules WO1998011992A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2615796P 1996-09-20 1996-09-20
US60/026,157 1996-09-20

Publications (1)

Publication Number Publication Date
WO1998011992A1 true WO1998011992A1 (fr) 1998-03-26

Family

ID=21830220

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/016323 WO1998011992A1 (fr) 1996-09-20 1997-09-17 Elimination des matieres particulaires respirables presentes dans les gaz brules

Country Status (1)

Country Link
WO (1) WO1998011992A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018121660A1 (fr) * 2016-12-29 2018-07-05 潍坊学院 Procédé d'élimination de particules d'un gaz
WO2018162528A1 (fr) * 2017-03-07 2018-09-13 Universität Für Bodenkultur Wien Procédé de séparation, dispositif de séparation et ensemble d'un dispositif de séparation pourvu d'une machine d'usinage du bois
CN110330062A (zh) * 2019-06-28 2019-10-15 华中科技大学 用于重金属吸附的异相凝并吸附剂及其制备方法和应用

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169714A (en) * 1977-01-14 1979-10-02 A.P.T., Inc. Removal of fine particles from a gas stream by solid particle addition in venturi contactor
US4699633A (en) * 1984-10-05 1987-10-13 Union Oil Company Of California Method for treating an aerosol to remove suspended particles therefrom
US5332562A (en) * 1993-06-18 1994-07-26 Kersey Larry M Method for removing particulate matter and gases from a polluted gas stream

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169714A (en) * 1977-01-14 1979-10-02 A.P.T., Inc. Removal of fine particles from a gas stream by solid particle addition in venturi contactor
US4699633A (en) * 1984-10-05 1987-10-13 Union Oil Company Of California Method for treating an aerosol to remove suspended particles therefrom
US5332562A (en) * 1993-06-18 1994-07-26 Kersey Larry M Method for removing particulate matter and gases from a polluted gas stream

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018121660A1 (fr) * 2016-12-29 2018-07-05 潍坊学院 Procédé d'élimination de particules d'un gaz
WO2018162528A1 (fr) * 2017-03-07 2018-09-13 Universität Für Bodenkultur Wien Procédé de séparation, dispositif de séparation et ensemble d'un dispositif de séparation pourvu d'une machine d'usinage du bois
CN110330062A (zh) * 2019-06-28 2019-10-15 华中科技大学 用于重金属吸附的异相凝并吸附剂及其制备方法和应用

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