US3625491A - Cleaning apparatus for contaminated gasses - Google Patents

Cleaning apparatus for contaminated gasses Download PDF

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Publication number
US3625491A
US3625491A US801665A US3625491DA US3625491A US 3625491 A US3625491 A US 3625491A US 801665 A US801665 A US 801665A US 3625491D A US3625491D A US 3625491DA US 3625491 A US3625491 A US 3625491A
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US
United States
Prior art keywords
gas
liquid
screen
screens
water
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
US801665A
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English (en)
Inventor
Masao Yokoi
Kiyoshi Uyama
Kenji Indo
Yoshiyuki Nakai
Tetsuya Yokogawa
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.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
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 Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Application granted granted Critical
Publication of US3625491A publication Critical patent/US3625491A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • B01D45/10—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators which are wetted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/72—Packing elements

Definitions

  • Gas-cleaning apparatus comprises a gas inlet port, a demister, a discharger port, and at least one liquid filmforming screen and liquid spray means disposed between the inlet port and screen, whereby gas passes through the liquid film-forming screen.
  • This invention relates to an improved cleaning apparatus for contaminated gas such as high-temperature exhaust gas from blast furnaces and the like, and more particularly to an improved cleaning apparatus wherein contaminated gas is passed through liquid films on a screen whereby to cool and clean high-temperature exhaust gas.
  • a vertical cylinder having an inlet for the contaminated gas at the lower center portion thereof.
  • a diverting duct is connected to the inlet to uniformly divert the gas from the axis of the cylinder toward the outside thereof.
  • the diverting duct is surrounded by a cylindrical screen including a mesh or a plurality of small openings of a size sufficient to form a liquid film and the screen is partitioned by baffle plates which permit the flow of gas.
  • Concentric cylinders are provided with a definite spacing.
  • the upper portion of the screen is connected to a slit passing a liquid whereby to form a liquid film on the screen by the continuously flowing down liquid. By passing exhaust gas through the screen, gas is cleaned at a high efficiency.
  • this construction is disadvantageous in that it is not only difficult to fabricate but it is difficult to replace corroded screens.
  • the size of the openings of the screen provided for the purpose of forming the liquid film is selected to be small in order to increase the cleaning effect through openings. These openings have a tendency to be clogged by contaminants or particles contained in the gas, thus causing a detrimental effect to the formation of a stable liquid film. Further, it is necessary to inspect and exchange the cylindrical screen to remove contaminants. For these reasons, it is highly desirable to provide a compact and rigid gas-cleaning apparatus which is easy to fabricate and repair.
  • a further object of this invention is to provide an improved gas-cleaning apparatus which is provided with a demister at the outlet port of the cleaned gas to remove mist.
  • a cleaning apparatus for contaminated gas comprising an inlet port for the contaminated gas, said inlet port being provided through a wall of the apparatus, a discharge port and a demister on another wall, the discharge port communicating with the interior of the apparatus through the demister, at least one liquid film-forming screen removably mounted at the center of the apparatus and liquid spray means disposed between the inlet port and the screen.
  • a gas cooling chamber including liquid sprays and dust removing screens is disposed at the bottom of the gas-cleaning apparatus and a pair of spaced-apart screens are disposed above the gas cooling chamber, so that after washing and removal of solid particles, the gas flows upwardly from the gas cooling chamber, then inwardly to the central portion of the apparatus through liquid films on screens and is finally discharged out of the apparatus through a demister mounted at the top center of the apparatus.
  • FIG. I shows a sectional view of one embodiment of this invention
  • FIG. 2 shows a front view of the apparatus shown in FIG. 1;
  • FIG. 3 is a top plan view of the apparatus shown in FIGS. I and 2;
  • FIG. 4 is a partial view to show the mounting of the screen spacers
  • FIG. 5 shows'a sectional view of a modified embodiment of this invention
  • FIG. 6 is a vertical sectional view taken along a line VI-VI in FIG. 5;
  • FIG. 7 is a top plan view of the modification shown in FIG. 6;
  • FIG. 8 is a partial view to show the mounting of the screen spacers utilized in the modified embodiment.
  • FIGS. 1 to 4 of the a accompanying drawing which illustrate one embodiment of this invention
  • gas to be cleaned is admitted into a gas cooling chamber 3 of a gascleaning apparatus 2 through an inlet port I through one sidewall.
  • cooling water pipes 4 In the gas cooling chamber are installed cooling water pipes 4 at three different levels.
  • Each cooling water pipe is provided with a plurality of spray nozzles to spray water to cool the gas admitted in the gas cooling chamber and to remove contaminants from the gas whereby nearly all of soluble gas compositions such as $0 and dust entrained in the gas are removed.
  • the gas is then caused to pass perpendicularly through a liquid film-forming screen 5 provided substantially at the center of the apparatus 2.
  • the screen comprises several sheets of metal wire netlike members, the number of the members being increased or decreased in accordance with the quantity and composition of the gas.
  • spacers 6 are interposed between adjacent netlike members to maintain a constant spacing between adjacent members.
  • the spacers and netlike members are removably fabricated.
  • a liquid tank 7 is removably mounted above screen 5 to form liquid films on the screen.
  • the liquid is supplied to the screen through a manifold with a plurality of nozzles and is drained to the outside of the apparatus through a discharge conduit 8.
  • the exhausted water may be supplied again to water tank 7 after passing through a suitable filter (not shown).
  • More than 99.5 percent of SO, contained in the gas can be removed by the liquid film-forming screen 5.
  • the gas flows toward the right-hand end of the apparatus and is then discharged out of the apparatus through a discharge port 10 and through a demister 9 packed with glass wool and the like and which is provided at the top of the apparatus to remove white fumes, mist or the like.
  • gas is admitted into a gas cooling chamber 13 at the lower center of the cleaning apparatus 12 through a gas inlet opening 11.
  • a pair of cooling water pipes 14 each provided with a plurality of vertically extending pipes 15 having a plurality of spray nozzles to spray liquid to cool the gas and remove contaminants therefrom.
  • each of the screens comprises from 3 to 30 sheets of metal wire nets which are removably fabricated with spacers 24 interposed between adjacent wire nets, the number of wire nets being variable dependent upon the composition and flow quantity of the gas.
  • Above the screens are removably mounted said water tanks 26 and 27 to supply water to screens 16 through 21 through nozzles. The major portion of the water falling into the bottom of the apparatus is discharged through a discharge pipe 31 and a portion of the water is discharged through a second discharge pipe 32 after passing through dust-removing wire nets 22 and 23.
  • discharged water may be supplied again to water tanks 26 and 27 after passing through a suitable filter, not shown.
  • More than 99.5 percent of SO, contained in the gas can be removed by the water films formed on the screens. After passing through these screens, gas in the central portion of the apparatus is discharged through a gas outlet port 34 and through a demister 33 packed with glass wool and the like.
  • the cleaning liquid either river or sea water can be used.
  • ammonia water and the like can be added to the liquid to render it a weak alkaline solution.
  • stainless steel it is also advantageous to use stainless steel to construct members subject to severe corrosion.
  • one liquid tank is mounted on each side of the top of the apparatus, where the number of screens used is increased, the number of water tanks may be increased to more than two on each side.
  • this invention provides an improved cleaning apparatus of simple and compact construction which can effectively clean and cool hightemperature gas.
  • fabrication, replacement, maintenance and inspection of the screens can be made very easily.
  • the provision of the demister assures complete removal of the mist contained in the cleaned gas.
  • Cleaning apparatus for contaminated gas comprising:
  • a gas cooling chamber at the bottom of said apparatus and including an inlet port to said chamber provided at the lower portion of said apparatus;
  • liquid spraying means on opposite sides of said gas cooling chamber, said spraying means including liquid spray nozzles;
  • each of said screens including a liquid collector at its lower end, said plurality of pairs of screens being removably mounted in several stages;
  • a demister mounted at the top of the central portion of said apparatus
  • Apparatus according to claim 1 including independent liquid tanks mounted on the top of said apparatus above said screens to supply liquid to form liquid films on said screens.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Separation Of Particles Using Liquids (AREA)
US801665A 1968-03-01 1969-02-24 Cleaning apparatus for contaminated gasses Expired - Lifetime US3625491A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1547168 1968-03-01
JP1547068 1968-03-01

Publications (1)

Publication Number Publication Date
US3625491A true US3625491A (en) 1971-12-07

Family

ID=26351619

Family Applications (1)

Application Number Title Priority Date Filing Date
US801665A Expired - Lifetime US3625491A (en) 1968-03-01 1969-02-24 Cleaning apparatus for contaminated gasses

Country Status (5)

Country Link
US (1) US3625491A (ru)
BE (1) BE729208A (ru)
DE (1) DE1909675A1 (ru)
FR (1) FR2003072A1 (ru)
GB (1) GB1252811A (ru)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347197A (en) * 1980-05-12 1982-08-31 Research Products Corporation Water distributor
US4595399A (en) * 1984-11-05 1986-06-17 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Nebulization reflux concentrator
US4775499A (en) * 1986-06-07 1988-10-04 Sankyo Kogyo Co., Ltd. Gas-liquid contacting apparatus
US5312594A (en) * 1992-09-18 1994-05-17 Nutech Environmental Corp. Sewage treatment apparatus
US6132678A (en) * 1992-09-18 2000-10-17 Nutech Enviromental Corporation Sewage treatment apparatus
US20070194471A1 (en) * 2003-09-17 2007-08-23 Tadayoshi Nagaoka Reactor with packing mean
US10724798B2 (en) * 2015-12-08 2020-07-28 Lee Wa Wong Cooling tower with multiple-layer cooling unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3880301D1 (de) * 1988-02-27 1993-05-19 Via Gmbh Fluessigkeitsabscheider.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US655285A (en) * 1900-04-20 1900-08-07 Richard H Thomas Air-purifying apparatus.
US1286550A (en) * 1917-07-31 1918-12-03 Charles W Davis Saturating element for cooling apparatus.
US1471112A (en) * 1919-12-13 1923-10-16 B F Sturtevant Co Apparatus for cooling air
US1813692A (en) * 1929-06-11 1931-07-07 B F Sturtevant Co Air conditioning apparatus
US1841536A (en) * 1926-02-27 1932-01-19 American Air Filter Co Filters for gas, air, and the like
US2158294A (en) * 1936-08-24 1939-05-16 William H Robinson Sr Air conditioner
US2529839A (en) * 1947-06-10 1950-11-14 Thomas H Garvey Air conditioner
US2833122A (en) * 1954-02-15 1958-05-06 Fluor Corp Water pre-cooled heat exchanger systems
US2998059A (en) * 1959-04-06 1961-08-29 Vilter Manufacturing Corp Spray type concentrator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US655285A (en) * 1900-04-20 1900-08-07 Richard H Thomas Air-purifying apparatus.
US1286550A (en) * 1917-07-31 1918-12-03 Charles W Davis Saturating element for cooling apparatus.
US1471112A (en) * 1919-12-13 1923-10-16 B F Sturtevant Co Apparatus for cooling air
US1841536A (en) * 1926-02-27 1932-01-19 American Air Filter Co Filters for gas, air, and the like
US1813692A (en) * 1929-06-11 1931-07-07 B F Sturtevant Co Air conditioning apparatus
US2158294A (en) * 1936-08-24 1939-05-16 William H Robinson Sr Air conditioner
US2529839A (en) * 1947-06-10 1950-11-14 Thomas H Garvey Air conditioner
US2833122A (en) * 1954-02-15 1958-05-06 Fluor Corp Water pre-cooled heat exchanger systems
US2998059A (en) * 1959-04-06 1961-08-29 Vilter Manufacturing Corp Spray type concentrator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347197A (en) * 1980-05-12 1982-08-31 Research Products Corporation Water distributor
US4595399A (en) * 1984-11-05 1986-06-17 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Nebulization reflux concentrator
US4775499A (en) * 1986-06-07 1988-10-04 Sankyo Kogyo Co., Ltd. Gas-liquid contacting apparatus
US5312594A (en) * 1992-09-18 1994-05-17 Nutech Environmental Corp. Sewage treatment apparatus
US6132678A (en) * 1992-09-18 2000-10-17 Nutech Enviromental Corporation Sewage treatment apparatus
US20070194471A1 (en) * 2003-09-17 2007-08-23 Tadayoshi Nagaoka Reactor with packing mean
US10724798B2 (en) * 2015-12-08 2020-07-28 Lee Wa Wong Cooling tower with multiple-layer cooling unit

Also Published As

Publication number Publication date
BE729208A (ru) 1969-08-01
DE1909675A1 (de) 1969-09-25
GB1252811A (ru) 1971-11-10
FR2003072A1 (ru) 1969-11-07

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