US3730499A - Damper-rod scrubber - Google Patents

Damper-rod scrubber Download PDF

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Publication number
US3730499A
US3730499A US00164762A US3730499DA US3730499A US 3730499 A US3730499 A US 3730499A US 00164762 A US00164762 A US 00164762A US 3730499D A US3730499D A US 3730499DA US 3730499 A US3730499 A US 3730499A
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US
United States
Prior art keywords
rod
scrubber
gases
passage
rods
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
US00164762A
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English (en)
Inventor
J Jonakin
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.)
Combustion Engineering Inc
Original Assignee
Combustion Engineering Inc
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 Combustion Engineering Inc filed Critical Combustion Engineering Inc
Application granted granted Critical
Publication of US3730499A publication Critical patent/US3730499A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • 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

Definitions

  • DAMPER-ROD SCRUBBER [75] Inventor: James Jonakin, Simsbury, Conn.
  • ABSTRACT A wet scrubber having spray means for spraying a liquid into a passageway, and a rod scrubber positioned downstream of the spray means by which impurities can be removed from the gas stream.
  • the rods of the scrubber are rotatably mounted, so that they can be rotated to a position parallel to the gas flow when it is desired.
  • the rods are removab1y attached, so that they can be readily replaced if the need arises.
  • the invention relates to a wet scrubber for removing impurities from dirty gases.
  • a wet scrubber for removing impurities from dirty gases.
  • One such means used is a rod scrubber consisting of a plurality of bars or rods which extend transversely across the width of a gas passage. A spray is located upstream of the rods, and the water as it passes through the openings between the rods collects the gaseous impurities.
  • a dirty fuel such as coal which contains ash and sulfur may be burned during certain times, and a clean fuel such as natural gas is used at other times.
  • a clean fuel such as natural gas
  • the exhaust gases have to be cleaned.
  • the exhaust from the combustion of natural gas does not have to be cleaned.
  • the volume of exhaust varies, and thus the pressure drop across the scrubber varies. Since the cleaning efficiency of the scrubber is dependent on the differential pressure across thescrubber, it is desirable to be able to add or remove scrubber rods as the load on the steam generator moves up or down.
  • the wet scrubber of my invention utilizes a plurality of scrubber rod beds, any one or all of which can be rotated 90 to a position where the rods are parallel to the flow of gases, thereby effectively removing them from the gas stream.
  • the rods are removably secured so that the width of the slits between the rods can be varied.
  • FIG. 1 is a sectional side view of a wet scrubber constructed in accordance with the invention
  • FIG. 2 is a sectional view taken on lines 22 of FIG. 1; and I FIG. 3 is a view similar to FIG. 2, after the scrubber rods have been rotated 90.
  • FIG. 1 of the drawings designates a wet scrubber constructed in accordance with the invention.
  • Dirty gases to be cleaned flow through duct 12 from a source, for example the furnace of a steam generator. These dirty gases are first subjected to a water spray from sprinkler 16, located in the upper portion of vertical duct 14. The gases together with the water then pass through a rod scrubber 18, where a large percentage of the impurities are removed with the water.
  • the gases then flow through a second water spray from sprinkler 20, and through a second bed of scrubber rods 22, where the gases are again washed.
  • the separated water droplets capture the solid particles and absorb certain gases, and fall by gravity to the floor of the scrubber housing, and are removed by pump 24.
  • the gases leaving rod scrubber 22 reverse their direction and flow upwardly through passage 26 to the outlet 30, where they are discharged to the atmosphere.
  • a demister 28 Positioned within passage 26 is a demister 28, which can be in the form of a plurality of zig-zag baffle plates. The continuous changing of direction of the gases flowing through the demister 28 causes separation of most of the fine water droplets still remaining in the gas stream. This water runs down the surfaces of the baffle plates, and drops to the scrubber housing floor, to be removed by pump 24.
  • the rods 22 are mounted on a rotatable axle 35.
  • the rods 22 can be rotated 90 (FIG. 3), so mat the rods are parallel to the walls of duct 14. This effectively removes the rods from the gas passage as far as cleaning is concerned, and also with respect to their forming a restriction in the flow path.
  • Motor 32 (FIG. 1) is used to rotate the rods of scrubber 18 to a vertical or horizontal position.
  • the rods of both rod scrubbers l8 and 22 can be rotated so that they are parallel to the walls of the gas passage. This would be done when a clean fuel, for example natural gas, was being burned in the furnace.
  • either one or both of the rod scrubber beds could be placed in their operating positions so that the rods extend transversely of the gas passage.
  • the cleaning efficiency is dependent on the pressure drop across the scrubber rod beds, which pressure drop is determined by the volume of gases passing therethrough. For example, when a steam generator is operating at full load, there may be 1 million cubic feet per minute of gases passing through the wet scrubber 10. With just rod scrubber 18 in operation, the pressure differential across the rod scrubber may be 8 inch water gauge. When the steam generator is operating at half load, there may only be 500,000 ft. /min. of gases, and the pressure differential across rod scrubber 18 may only be 2 or 3 inch water gauge.
  • the pressure differential across both rod scrubbers 18 and 22 may again approximate 8 inch water gauge. If, the greatest cleaning efficiency for the amount of impurities in the gases were determined to be 8 inch pressure differential, then both rod scrubbers would be placed in operation when the unit was operating at half load.
  • the rods are made up of inner rod members 36, which are integral with the axle 35. Slipped over the inner rod members 36 are outer sleeve members 38. Sleeve memscrubber bed arrangements, depending on whether both beds are in operating position, or just bed 18 or bed 22 alone.
  • the rods or rod scrubber 18 are made up of inner rods and outer removable sleeves, as is the case of rod scrubber 22.
  • a wet scrubber for removing impurities from gases, passage means through which the gases flow, spray means for spraying a liquid into the passage means, a plurality of parallel, spaced, rod means extending transversely across the passage means downstream of the spray means, and means for rotating the rod means 90, so that the rod means are parallel to the axis of the passage means.
  • each of rod means is made up of an inner rod, and an outer sleeve surrounding inner rod, and means for removably securing the outer sleeve to the inner rod, so that the outer sleeve can be replaced when desired.
  • passage means downstream of the first rod means thereby forming a plurality of slits between the second rod means through which the gases may flow, and means for rotating the second rod means so that the second rod means are parallel to the axis of the passage means.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Separation Of Particles Using Liquids (AREA)
US00164762A 1971-07-21 1971-07-21 Damper-rod scrubber Expired - Lifetime US3730499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16476271A 1971-07-21 1971-07-21

Publications (1)

Publication Number Publication Date
US3730499A true US3730499A (en) 1973-05-01

Family

ID=22595991

Family Applications (1)

Application Number Title Priority Date Filing Date
US00164762A Expired - Lifetime US3730499A (en) 1971-07-21 1971-07-21 Damper-rod scrubber

Country Status (7)

Country Link
US (1) US3730499A (enrdf_load_stackoverflow)
JP (1) JPS5010028B1 (enrdf_load_stackoverflow)
CA (1) CA973799A (enrdf_load_stackoverflow)
ES (1) ES404890A1 (enrdf_load_stackoverflow)
FR (1) FR2146423B1 (enrdf_load_stackoverflow)
GB (1) GB1362620A (enrdf_load_stackoverflow)
SE (1) SE387055B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976455A (en) * 1975-05-06 1976-08-24 American Air Filter Company, Inc. Apparatus for cleaning a dirty gas stream
US4206159A (en) * 1979-01-05 1980-06-03 Combustion Engineering, Inc. Rod scrubber
EP0013299A1 (en) * 1978-12-20 1980-07-23 Combustion Engineering, Inc. Method and apparatus for treating flue gases
US10881980B2 (en) * 2017-08-16 2021-01-05 Doosan Lentjes Gmbh Scrubber tray and a wet scrubber tower comprising such scrubber tray

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61155510U (enrdf_load_stackoverflow) * 1985-03-19 1986-09-26

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348825A (en) * 1966-02-03 1967-10-24 Nat Dust Collector Corp Apparatus for collecting contaminants from gases
US3488039A (en) * 1968-05-20 1970-01-06 Nat Dust Collector Corp Filter bed for dust collector
US3522000A (en) * 1967-09-06 1970-07-28 Chillum Sheet Metal Inc Method and apparatus for cooling and purifying gaseous products of combustion
US3544087A (en) * 1969-04-17 1970-12-01 Nat Dust Collector Corp Filter apparatus for gas scrubber
US3680282A (en) * 1970-05-28 1972-08-01 Nat Dust Collector Corp Gas scrubber

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348825A (en) * 1966-02-03 1967-10-24 Nat Dust Collector Corp Apparatus for collecting contaminants from gases
US3522000A (en) * 1967-09-06 1970-07-28 Chillum Sheet Metal Inc Method and apparatus for cooling and purifying gaseous products of combustion
US3488039A (en) * 1968-05-20 1970-01-06 Nat Dust Collector Corp Filter bed for dust collector
US3544087A (en) * 1969-04-17 1970-12-01 Nat Dust Collector Corp Filter apparatus for gas scrubber
US3680282A (en) * 1970-05-28 1972-08-01 Nat Dust Collector Corp Gas scrubber

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976455A (en) * 1975-05-06 1976-08-24 American Air Filter Company, Inc. Apparatus for cleaning a dirty gas stream
EP0013299A1 (en) * 1978-12-20 1980-07-23 Combustion Engineering, Inc. Method and apparatus for treating flue gases
US4206159A (en) * 1979-01-05 1980-06-03 Combustion Engineering, Inc. Rod scrubber
EP0013431A1 (en) * 1979-01-05 1980-07-23 Lummus Crest S.A.R.L. Rod scrubber
US10881980B2 (en) * 2017-08-16 2021-01-05 Doosan Lentjes Gmbh Scrubber tray and a wet scrubber tower comprising such scrubber tray

Also Published As

Publication number Publication date
DE2228039A1 (de) 1973-04-05
FR2146423B1 (enrdf_load_stackoverflow) 1976-08-13
SE387055B (sv) 1976-08-30
ES404890A1 (es) 1975-06-16
FR2146423A1 (enrdf_load_stackoverflow) 1973-03-02
DE2228039B2 (de) 1976-08-05
CA973799A (en) 1975-09-02
GB1362620A (en) 1974-08-07
JPS5010028B1 (enrdf_load_stackoverflow) 1975-04-17

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