US3823063A - Method and system for pulp stock supply - Google Patents

Method and system for pulp stock supply Download PDF

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Publication number
US3823063A
US3823063A US00279978A US27997872A US3823063A US 3823063 A US3823063 A US 3823063A US 00279978 A US00279978 A US 00279978A US 27997872 A US27997872 A US 27997872A US 3823063 A US3823063 A US 3823063A
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US
United States
Prior art keywords
stock
pump
sheet
vanes
forming device
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
US00279978A
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English (en)
Inventor
T Sutton
T Callahan
H Kingsbury
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.)
Allis Chalmers Pump Inc
ITT Inc
Original Assignee
Allis Chalmers Corp
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 Allis Chalmers Corp filed Critical Allis Chalmers Corp
Priority to US00279978A priority Critical patent/US3823063A/en
Priority to CA164,873A priority patent/CA989222A/en
Priority to AU58820/73A priority patent/AU489385B2/en
Priority to GB3895975A priority patent/GB1437636A/en
Priority to GB3720873A priority patent/GB1437635A/en
Priority to ZA00735391A priority patent/ZA735391B/xx
Priority to SE7310866A priority patent/SE404614B/xx
Priority to JP8963573A priority patent/JPS5431524B2/ja
Priority to FR7329392A priority patent/FR2195722B1/fr
Priority to BR6145/73A priority patent/BR7306145D0/pt
Priority to US397080A priority patent/US3873231A/en
Application granted granted Critical
Publication of US3823063A publication Critical patent/US3823063A/en
Assigned to WOODS KATHLEEN D., AS TRUSTEE, CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE reassignment WOODS KATHLEEN D., AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS CORPORATION A DE CORP.
Assigned to ALLIS-CHALMERS PUMP, INC., A DE CORP reassignment ALLIS-CHALMERS PUMP, INC., A DE CORP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALLIS-CHALMERS CORPORATION A DE CORP
Assigned to CONNECTICUT NATIONAL BANK, THE, A NATIONAL BANKING ASSOCIATION, WOODS, KATHLEEN D. reassignment CONNECTICUT NATIONAL BANK, THE, A NATIONAL BANKING ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS PUMP, INC.
Assigned to ITT CORPORATION, 320 PARK AVE., NEW YORK, NY, A CORP. OF DE. reassignment ITT CORPORATION, 320 PARK AVE., NEW YORK, NY, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALLIS-CHALMERS CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper

Definitions

  • This invention relates in general to paper making and more particularly to a method and system for supplying pulp stock to the sheet forming device.
  • the stock (which includes water, pulp, fiber, filler, dye, glue, etc.) delivered to the web forming region of the machine should be evenly distributed across the machine width.
  • the stock should be delivered to the web forming region as a uniform pressure and velocity across the width of the machine and constant pressure and velocity relationship should be maintained at all times.
  • Barring is the change in sheet thickness or caliper in parallel lines. These lines or barrs occur at regular intervals running across the sheet perpendicular to the direction of flow of the sheet machine. Barring is detrimental primarily because it reduces the uniformity and quality of a sheet for such subsequent operations as printing and coating.
  • a further object of this invention is to provide a method of supplying stock to a sheet paper forming device wherein the pulsations induced by the system pump into the stock have a high frequency and a small magnitude and the pulses are generated in a pattern other than a sine wave pattern.
  • Another object of the invention is to provide a system for delivering stock to a web forming device of the hereinbefore described type wherein a plurality of circumferentially spaced vanes are disposed about the outer peripheral ends of the system pump impeller blades to thereby divide the output from the impeller blades into a plurality of individual streams.
  • a more specific object of the subject invention is to provide a system of the hereinbefore described type wherein the outer ends of the adjacent vanes are equally spaced whereas the inner ends of adjacent vanes are unequally spaced.
  • An additional specific object of the subject invention is to provide a system of the hereinbefore described type wherein the distances between the radially outer ends of adjacent impeller blades and the radially inner ends of adjacent vanes are unequal.
  • FIG. 1 is a schematic view of a stock supply system constructed in accordance with the invention and utilizing a Fourdrinier type machine;
  • FIG. 2 is a typical cross sectional view of a pump constructed in a manner for use in the system of this invention taken along the lines 1III of FIG. 3;
  • FIG. 3 is a partial vertical cross sectional view of a novel pump utilized in the system of this invention.
  • FIG. 4 is a schematic view of a modified form of novel pump which can be used in the system.
  • FIG. 5 is a schematic view of a typical vaned diffuser pump which can be used in the system.
  • a stock supply system is shown for purposes of illustration applied to a Fourdrinier type machine.
  • the paper or web forming device includes a forming wire 6 traveling over breast roll 7. Excess white water or stock draining from the forming wire is collected in a collecting trough or wire pit 8 and flows through a pipe 9 to a circulating pump generally designated 11.
  • a new stock supply conduit 12 is normally provided upstream from the pump 11 to make up any additional stock for the system.
  • the resulting stock mixture is supplied through a pipe 13 to a suitable screening and/or cleaning device 14.
  • the flow through the pipe 13 may be controlled by a number of methods such as valve 16 shown. From the screening machine the stock flows through the conduit 17 into a spreader 18 of any conventional type which spreads the stock out to equal the width of the sheet desired. From the spreader the stock is delivered through the header 19 to the discharge or slice 20 and to the web forming device.
  • the pump 11 shown herein for purposes of illustration is an in-line pump which can be connected directly to the system conduit.
  • the pump inlet flange 21 may be bolted directly to one end of the conduit 9 and the pump discharge flange 22 is bolted to one end of conduit 13.
  • Stock enters the pump pumping chamber 23 wherein it is acted upon by the impeller blades 24.
  • the impeller blades 24 mix and pressurize the paper stock and propel it between the spaces 26 defined by adjacent vanes 27.
  • These vanes are located about the outer peripheral edge of the impeller blades and define a plurality of passageways for the stock.
  • the stock is caused to split into a large number of separate streams as it passes through the spaces defined by adjacent vanes. This then results in the system witnessing a large number of low magnitude pressure pulses.
  • the spaces between the inner ends of adjacent vanes of the pump shown in FIG. 2 are unequal to one another, whether the spaces between adjacent outer ends of the diffuser vanes are equal.
  • the unequal spacing of vanes 27 at the flow inlet area results in an uneven distribution of low magnitude pressure pulses, whereas the even spacing of vanes at the flow outlet area results in a smooth transition to singular flow in the volute or annular chamber 28.
  • FIG. 4 shows a modified form of pump which may be used to practice the method and system of this invention.
  • This pump is distinguished from a typical vaned diffuser pump as shown in FIG. 5 by the spacing R and R of alternate vanes 27. These alternate vanes of different lengths provide for the formation of additional streams of stock.
  • the spacing R is constant. It is desirable to keep the spacing R at a minimum to maximize efficiency of the pump. However, it has been determined that with a minimum R distance a line of turbulence is developed in the space R. This turbulence has the tendency to produce undesirable noise.
  • a rotary pump connected to said conduit means in a manner to induce flow ofstock therethrough, said pump having a pumping chamber positioned to receive stock from said conduit; a multi-bladed impeller rotatably contained within said pumping chamber; vanes defining a plurality of circumferentially spaced passages positioned to receive stock from said impeller, said passages dividing said stock into a plurality of individual streams, said vanes being constructed and arranged so that the crosssectional area of the inner ends of some of said passages are une'qual to the cross-sectional area of some of the other of said passages and wherein the cross-sectional area of the outer ends of said passages

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00279978A 1972-08-11 1972-08-11 Method and system for pulp stock supply Expired - Lifetime US3823063A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US00279978A US3823063A (en) 1972-08-11 1972-08-11 Method and system for pulp stock supply
CA164,873A CA989222A (en) 1972-08-11 1973-02-28 Method and system for pulp stock supply
AU58820/73A AU489385B2 (en) 1972-08-11 1973-08-02 Improved method and system of pulp stock supply and pump therefor
GB3895975A GB1437636A (en) 1972-08-11 1973-08-06 Pumps
GB3720873A GB1437635A (en) 1972-08-11 1973-08-06 Method of and apparatus for pulp stock supply to a paper making machine
ZA00735391A ZA735391B (en) 1972-08-11 1973-08-08 Improved method and system of pulp stock supply and pump therefor
SE7310866A SE404614B (sv) 1972-08-11 1973-08-08 Sett och matningsanordning for att tillfora meld till en papperstillverkningsmaskin
JP8963573A JPS5431524B2 (enrdf_load_html_response) 1972-08-11 1973-08-09
FR7329392A FR2195722B1 (enrdf_load_html_response) 1972-08-11 1973-08-10
BR6145/73A BR7306145D0 (pt) 1972-08-11 1973-08-10 Aperfeicoado processo e dispositivo para suprimento de estoque de polpa a um dispositivo de formacao de folha e bomba de fluido rotatorio para uso no processo
US397080A US3873231A (en) 1972-08-11 1973-09-13 Centrifugal pump diffuser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00279978A US3823063A (en) 1972-08-11 1972-08-11 Method and system for pulp stock supply

Publications (1)

Publication Number Publication Date
US3823063A true US3823063A (en) 1974-07-09

Family

ID=23071140

Family Applications (1)

Application Number Title Priority Date Filing Date
US00279978A Expired - Lifetime US3823063A (en) 1972-08-11 1972-08-11 Method and system for pulp stock supply

Country Status (8)

Country Link
US (1) US3823063A (enrdf_load_html_response)
JP (1) JPS5431524B2 (enrdf_load_html_response)
BR (1) BR7306145D0 (enrdf_load_html_response)
CA (1) CA989222A (enrdf_load_html_response)
FR (1) FR2195722B1 (enrdf_load_html_response)
GB (2) GB1437636A (enrdf_load_html_response)
SE (1) SE404614B (enrdf_load_html_response)
ZA (1) ZA735391B (enrdf_load_html_response)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132504A (en) * 1976-04-07 1979-01-02 General Signal Corporation Liquid ring pump
US4781793A (en) * 1986-07-04 1988-11-01 Valmet Oy Method for improving paper properties in multiply paper using long and short fiber layers
US4913620A (en) * 1987-03-23 1990-04-03 Attwood Corporation Centrifugal water pump
US4952314A (en) * 1987-11-11 1990-08-28 A. Ahlstrom Corporation Apparatus for treating pulp
US4964950A (en) * 1985-01-24 1990-10-23 A. Ahlstrom Corporation Method and apparatus for dividing and uniting the flows of high-consistency fibre suspensions
US5058615A (en) * 1987-07-02 1991-10-22 A. Ahlstrom Corporation Method and apparatus for pumping high consistency pulp
US20100150709A1 (en) * 2007-07-12 2010-06-17 Abb Turbo Systems Ag Diffuser for centrifugal compressor
US9303647B2 (en) 2011-08-15 2016-04-05 Dale A. Conway Centrifugal pump anti-air locking system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3912279A1 (de) * 1989-04-14 1990-10-18 Klein Schanzlin & Becker Ag Leitrad fuer kreiselpumpen
JP3281177B2 (ja) 1994-05-26 2002-05-13 旭化成株式会社 耐黄変性濃染性ポリヘキサメチレンアジパミド繊維およびその製造方法

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132504A (en) * 1976-04-07 1979-01-02 General Signal Corporation Liquid ring pump
US4964950A (en) * 1985-01-24 1990-10-23 A. Ahlstrom Corporation Method and apparatus for dividing and uniting the flows of high-consistency fibre suspensions
US4781793A (en) * 1986-07-04 1988-11-01 Valmet Oy Method for improving paper properties in multiply paper using long and short fiber layers
US4913620A (en) * 1987-03-23 1990-04-03 Attwood Corporation Centrifugal water pump
US5058615A (en) * 1987-07-02 1991-10-22 A. Ahlstrom Corporation Method and apparatus for pumping high consistency pulp
US4952314A (en) * 1987-11-11 1990-08-28 A. Ahlstrom Corporation Apparatus for treating pulp
US20100150709A1 (en) * 2007-07-12 2010-06-17 Abb Turbo Systems Ag Diffuser for centrifugal compressor
US7845900B2 (en) * 2007-07-12 2010-12-07 Abb Turbo Systems Ag Diffuser for centrifugal compressor
US9303647B2 (en) 2011-08-15 2016-04-05 Dale A. Conway Centrifugal pump anti-air locking system

Also Published As

Publication number Publication date
JPS4942906A (enrdf_load_html_response) 1974-04-23
FR2195722A1 (enrdf_load_html_response) 1974-03-08
AU5882073A (en) 1975-02-06
FR2195722B1 (enrdf_load_html_response) 1976-04-30
CA989222A (en) 1976-05-18
BR7306145D0 (pt) 1974-07-18
GB1437635A (en) 1976-06-03
JPS5431524B2 (enrdf_load_html_response) 1979-10-08
SE404614B (sv) 1978-10-16
ZA735391B (en) 1975-03-26
GB1437636A (en) 1976-06-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

AS Assignment

Owner name: ALLIS-CHALMERS PUMP, INC., A DE CORP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP;REEL/FRAME:004432/0807

Effective date: 19850626

AS Assignment

Owner name: CONNECTICUT NATIONAL BANK, THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS PUMP, INC.;REEL/FRAME:004441/0414

Effective date: 19850522

Owner name: WOODS, KATHLEEN D.

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS PUMP, INC.;REEL/FRAME:004441/0414

Effective date: 19850522

AS Assignment

Owner name: ITT CORPORATION, 320 PARK AVE., NEW YORK, NY, A CO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIS-CHALMERS CORPORATION;REEL/FRAME:005031/0424

Effective date: 19881110