US3844744A - System for discharging flue gases - Google Patents

System for discharging flue gases Download PDF

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Publication number
US3844744A
US3844744A US00235208A US23520872A US3844744A US 3844744 A US3844744 A US 3844744A US 00235208 A US00235208 A US 00235208A US 23520872 A US23520872 A US 23520872A US 3844744 A US3844744 A US 3844744A
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US
United States
Prior art keywords
nozzle
insert
section
outlet
gases
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
US00235208A
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English (en)
Inventor
G Hausberg
K Hegemann
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.)
Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
Original Assignee
Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
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
Priority claimed from DE19712112541 external-priority patent/DE2112541C/de
Priority claimed from DE19712123338 external-priority patent/DE2123338B2/de
Application filed by Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG filed Critical Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
Priority to US00345762A priority Critical patent/US3854908A/en
Application granted granted Critical
Publication of US3844744A publication Critical patent/US3844744A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/002—Evacuating and treating of exhaust gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/64—Controlling the physical properties of the gas, e.g. pressure or temperature
    • 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
    • Y10S261/54—Venturi scrubbers

Definitions

  • Our present invention relates to an apparatus for the removal of high-pressure waste gases from blast furnaces or the like preparatorily to utilizing them at reduced pressure in, say, a heat exchanger or a burner.
  • Flue gases from modern blast furnaces may exit at a pressure of about 3.5 atmospheres (absolute), so that a substantial pressure reduction is necessary to bring them down to atmospheric level.
  • tapering insert portions of approximately the same axial length may be cascaded in as many converging nozzle sections to multiply the regulating effect of a single gap.
  • the restricted passage following the variable gap or gaps is provided with flow-retarding means such as, for example, an array of axially extending ribs integral with the nozzle and/or its insert to enhance the throttling action by introducing additional boundary layers;
  • the flow-retarding means could also be in the form of discontinuities such as grids or perforated barrier disks in that passage designed to generate turbulence with resulting additional energy loss.
  • the nozzle was generally mounted in a partition dividing the wash tower into an upstream and a downstream compartment
  • our present improvement may be embodied in a system lacking the upstream compartment so that the duct carrying the waste gases from the blast furnace or other source terminates in the nozzle body without widening into a shell around that body. This is so because there exists no longer a need for measuring the pressure differential across a partition in order to insure the maintenance of a predetermined minimum pressure drop.
  • the downstream compartment may serve the same function as in these earlier systems by causing the gas flow to be sharply deflected so as to separate it from substantially all accompanying solid particles wetted by droplets of water from one or more spray heads upstream of the nozzle. Aside from thus scrubbing the gas, the water spray also has the task of cooling the flow passing through the nozzle.
  • FIG. 3 is a cross-sectional view taken on the line 111 III of FIG. 2;
  • FIG. 4 is a view similar to FIG. 2, showing a modification
  • FIG. 5 is a further view similar to FIG. 4, showing yet another modification
  • FIG. 6 is a cross-sectional view taken on the line VI VI of FIG. 5;
  • FIG. 7 is a view similar to FIG. 6, illustrating a further detail.
  • the plant shown in FIG. 1 comprises a blast furnace 3 with a flue 2 from which a duct 1 carries highpressure waste gases to a depressurizing apparatus embodying our invention.
  • the apparatus includes a nozzle body 5, formed integral with the lower end of duct 1, surrounding an insert 4 with all-around clearance.
  • the upper part 4a of this insert has a wider upstream end and a narrower downstream end so as to have a downwardly tapering configuration geometrically similar to that of the surrounding nozzle section with which it defines a gap 6 of variable width.
  • a cylindrical downward extension 7 of tapering insert portion 4a or a width corresponding to that of the downstream end of that portion, defines with a surrounding portion of the nozzle body an annular passage 10 of constant width downstream of gap 6.
  • Insert 4 is mounted on a stem 18 which rises from the base of a 1 separating compartment 17 and can be raised or lowered, as indicated by an arrow 9, with the aid of actuating means in the form of a solenoid 19 within compartment 17.
  • a pressure sensor 20 detects the outlet pressure of the gases issuing from the nozzle and energizes the solenoid in a sense tending to keep that outlet pressure substantially constant.
  • Compartment 17 has an exit port 21 above the level of that outlet so that the gas must abruptly change direction (as indicated by the arrows in FIG. 1) in order to escape, thereby shedding the wetted particles which are collected on the bottom of compartment 17 in a trough not shown.
  • FIGS. 2 and 3 includes flowretarding means in the form of axially extending ribs 11 alternately secured to the inner wall of the nozzle body and the cylindrical extension 7 of the insert 4, thereby subdividing the passage 1,0 into a multiplicity of relatively narrow channels 8.
  • an insert 4' may be provided with more than one tapering portion including, in this case, a portion 4b interposed between portions 4a and 7. This subdivides the adjustable gap into two zones 6a, 6b whose width, owing to the identical vertex angle of the tapers, varies identically upon axial motion of the insert.
  • An intervening gap zone 6c of reduced axial length compared with zones 6a and 6b, contracts when the latter zones expand and should be made wide enough to avoid any significant obstruction of the gas flow within the stroke range of insert 4'.
  • FIG. shows a set of guide vanes 13 mounted in the duct 1 near the top of insert 4, these vanes being helically pitched at a small angle to the vertical axis (e.g. up to about 10) to impart a swirling motion to the gas flow.
  • the ribs 11 within passage 10 are here also inclined, at a similar pitch angle but in the opposite sense, to increase the energy losses of the gas by changing the direction of flow.
  • the lower end of the nozzle body 5 forms an outwardly flared skirt 14 defining two parallel annular channels 22 with a pair of downwardly diverging sleeves 15 secured to the nozzle body by narrow webs 16 which may also be helically pitched as shown, preferably in the same sense as the vanes 13.
  • the ribs 11 in passage 10 could be supplemented or replaced by one or more annular barrier disks 22' provided with peripherally spaced perforations 23 as shown in FIG. 7.
  • the perforations 23 may be relatively offset to throttle the flow still further.
  • An apparatus for depressurizing high-pressure waste gases comprising: v
  • a duct having an inlet connected to a source of waste gases to be depressurized, said duct terminating in a nozzle with a first section converging toward an outlet formed by an outwardly flared skirt and a elongated second section of substantially constant cross-section between said first section and said outlet;
  • said insert received with all-around clearance in said nozzle, said insert having a tapering portion with a wider upstream end and a narrower downstream end defining with said first section a regulating gap of a width depending upon the relative axial position of said insert and said nozzle, said insert further having an extension of substantially constant width axially adjoining said tapering portion at said narrower down-stream end and defining with said second section a restricted passage exerting upon said gases a throttling effect substantially independent of said axial position;
  • control means coupled to said insert for varying said relative axial position.
  • control means comprises pressure-sensing means at saidoutlet and actuating means for said nozzle responsive to an output of said pressure-sensing means for displacing said insert in a sense tending to maintain a substantially constant gas pressure in said outlet.
  • An apparatus as defined in claim 10 further comprising a separating compartment below said nozzle provided with an exit for said gases above the level of said outlet whereby said gases are deflected upon issuing from said nozzle, and spray means in said duct above said nozzle for wetting said gases to facilitate the shedding of moisture-laden solids therefrom in said compartment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Treating Waste Gases (AREA)
US00235208A 1971-03-16 1972-03-16 System for discharging flue gases Expired - Lifetime US3844744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00345762A US3854908A (en) 1971-03-16 1973-03-28 Apparatus for discharging flue gases from blast furnaces and the like

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712112541 DE2112541C (de) 1971-03-16 Vorrichtung zum Gichtgasabzug bei Hochdruck-Hochöfen
DE19712123338 DE2123338B2 (de) 1971-05-11 1971-05-11 Vorrichtung zum gichtgasabzug bei hochdruck-hochoefen

Publications (1)

Publication Number Publication Date
US3844744A true US3844744A (en) 1974-10-29

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ID=25760801

Family Applications (1)

Application Number Title Priority Date Filing Date
US00235208A Expired - Lifetime US3844744A (en) 1971-03-16 1972-03-16 System for discharging flue gases

Country Status (9)

Country Link
US (1) US3844744A (enrdf_load_stackoverflow)
JP (1) JPS5141842B1 (enrdf_load_stackoverflow)
AT (1) AT324375B (enrdf_load_stackoverflow)
BE (1) BE780746A (enrdf_load_stackoverflow)
FR (1) FR2130241B1 (enrdf_load_stackoverflow)
GB (1) GB1362306A (enrdf_load_stackoverflow)
IT (1) IT950217B (enrdf_load_stackoverflow)
LU (1) LU64950A1 (enrdf_load_stackoverflow)
NL (1) NL145904B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52105374A (en) * 1976-02-27 1977-09-03 Mannesmann Ag Dust remover operating method and system
US4093434A (en) * 1975-03-26 1978-06-06 Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserruckkuhlanlagen Kommanditgesellschaft Gas-scrubber apparatus for blast furnace
US4123238A (en) * 1975-08-16 1978-10-31 Gottfried Bischoff Bau Kompl. Gastreinigungs- Und Wasserruckkuhlanlagen Kommanditgesellschaft Flow-control nozzle for flue-gas scrubber
US4133655A (en) * 1976-02-25 1979-01-09 De Cardenas S.P.A. Scrubber for blast furnace gas
US4152123A (en) * 1977-12-16 1979-05-01 Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserruckkuhlanlagen Gmbh & Co. Kommanditgesellschaft Gas-cleaning apparatus and method for high-pressure blast furnace
US4167401A (en) * 1979-01-04 1979-09-11 Arthur G. Mckee & Company Scrubber having fixed throat venturi and adjustable plug
US4216001A (en) * 1979-01-10 1980-08-05 The Chemithon Corporation Gas scrubbing apparatus
US20070045165A1 (en) * 2005-08-26 2007-03-01 Next-Ro, Inc. Reverse osmosis filtration systems
US20070045327A1 (en) * 2005-08-26 2007-03-01 Next-Ro, Inc. Reverse osmosis filtration system storage tanks
US8409386B1 (en) 2010-02-22 2013-04-02 Next-Ro, Inc. Storage tank assemblies and methods for water on water reverse osmosis systems
US9731984B2 (en) 2010-02-19 2017-08-15 Topper Manufacturing Corporation Reverse osmosis systems with built in pressure regulation
CN115900372A (zh) * 2022-12-10 2023-04-04 安徽华塑股份有限公司 一种电石炉烟气除尘装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2215565C2 (de) * 1972-03-30 1974-03-21 Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserrueckkuehlanlagen Kg, 4300 Essen Vorrichtung zum Gichtgasabzug bei Hochdruck-Hochöfen
EP3244152B1 (en) 2016-05-12 2019-11-06 Danieli Corus BV Furnace plant and process for treating furnace gas

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1447554A (en) * 1919-04-03 1923-03-06 Jones William Anthony Fan
US2192214A (en) * 1936-08-11 1940-03-05 Horace M Weir Cracking process and apparatus
GB870812A (en) * 1958-07-08 1961-06-21 Dust Control Processes Ltd Improvements in or relating to dust separators
US3140163A (en) * 1961-03-17 1964-07-07 Bischoff Gottfried Apparatus for cleaning gases
US3199267A (en) * 1961-01-19 1965-08-10 Bischoff Gottfried Gas scrubber
US3626672A (en) * 1969-04-14 1971-12-14 Amercoat Corp Gas scrubber apparatus
US3726065A (en) * 1970-10-10 1973-04-10 Bischoff Gasreinigung Apparatus for cleaning flue gases of blast furnaces and the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1447554A (en) * 1919-04-03 1923-03-06 Jones William Anthony Fan
US2192214A (en) * 1936-08-11 1940-03-05 Horace M Weir Cracking process and apparatus
GB870812A (en) * 1958-07-08 1961-06-21 Dust Control Processes Ltd Improvements in or relating to dust separators
US3199267A (en) * 1961-01-19 1965-08-10 Bischoff Gottfried Gas scrubber
US3140163A (en) * 1961-03-17 1964-07-07 Bischoff Gottfried Apparatus for cleaning gases
US3626672A (en) * 1969-04-14 1971-12-14 Amercoat Corp Gas scrubber apparatus
US3726065A (en) * 1970-10-10 1973-04-10 Bischoff Gasreinigung Apparatus for cleaning flue gases of blast furnaces and the like

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093434A (en) * 1975-03-26 1978-06-06 Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserruckkuhlanlagen Kommanditgesellschaft Gas-scrubber apparatus for blast furnace
US4123238A (en) * 1975-08-16 1978-10-31 Gottfried Bischoff Bau Kompl. Gastreinigungs- Und Wasserruckkuhlanlagen Kommanditgesellschaft Flow-control nozzle for flue-gas scrubber
US4133655A (en) * 1976-02-25 1979-01-09 De Cardenas S.P.A. Scrubber for blast furnace gas
JPS52105374A (en) * 1976-02-27 1977-09-03 Mannesmann Ag Dust remover operating method and system
US4152123A (en) * 1977-12-16 1979-05-01 Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserruckkuhlanlagen Gmbh & Co. Kommanditgesellschaft Gas-cleaning apparatus and method for high-pressure blast furnace
US4167401A (en) * 1979-01-04 1979-09-11 Arthur G. Mckee & Company Scrubber having fixed throat venturi and adjustable plug
US4216001A (en) * 1979-01-10 1980-08-05 The Chemithon Corporation Gas scrubbing apparatus
US20070045327A1 (en) * 2005-08-26 2007-03-01 Next-Ro, Inc. Reverse osmosis filtration system storage tanks
US20070045165A1 (en) * 2005-08-26 2007-03-01 Next-Ro, Inc. Reverse osmosis filtration systems
US20080203026A1 (en) * 2005-08-26 2008-08-28 Next-Ro, Inc. Reverse Osmosis Filtration System Storage Tanks
US7601256B2 (en) 2005-08-26 2009-10-13 Next-Ro, Inc. Reverse osmosis filtration systems
US20100024893A1 (en) * 2005-08-26 2010-02-04 Next-Ro, Inc. Reverse Osmosis Filtration Systems
US7726511B2 (en) * 2005-08-26 2010-06-01 Next-Ro, Inc. Reverse osmosis filtration system storage tanks
US7763171B2 (en) 2005-08-26 2010-07-27 Next-Ro, Inc. Reverse osmosis filtration system storage tanks
US9731984B2 (en) 2010-02-19 2017-08-15 Topper Manufacturing Corporation Reverse osmosis systems with built in pressure regulation
US10457574B2 (en) 2010-02-19 2019-10-29 Topper Manufacturing Corporation Reverse osmosis systems with built in pressure regulation
US8409386B1 (en) 2010-02-22 2013-04-02 Next-Ro, Inc. Storage tank assemblies and methods for water on water reverse osmosis systems
CN115900372A (zh) * 2022-12-10 2023-04-04 安徽华塑股份有限公司 一种电石炉烟气除尘装置

Also Published As

Publication number Publication date
FR2130241B1 (enrdf_load_stackoverflow) 1977-04-01
BE780746A (fr) 1972-07-03
FR2130241A1 (enrdf_load_stackoverflow) 1972-11-03
AT324375B (de) 1975-08-25
GB1362306A (en) 1974-08-07
NL7203465A (enrdf_load_stackoverflow) 1972-09-19
NL145904B (nl) 1975-05-15
LU64950A1 (enrdf_load_stackoverflow) 1972-07-07
JPS5141842B1 (enrdf_load_stackoverflow) 1976-11-12
IT950217B (it) 1973-06-20

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