US3823063A - Method and system for pulp stock supply - Google Patents
Method and system for pulp stock supply Download PDFInfo
- 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
- Authority
- 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
Links
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paper (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
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 |
GB3720873A GB1437635A (en) | 1972-08-11 | 1973-08-06 | Method of and apparatus for pulp stock supply to a paper making machine |
GB3895975A GB1437636A (en) | 1972-08-11 | 1973-08-06 | Pumps |
ZA00735391A ZA735391B (en) | 1972-08-11 | 1973-08-08 | Improved method and system of pulp stock supply and pump therefor |
SE7310866A SE404614B (en) | 1972-08-11 | 1973-08-08 | SET AND FEEDING DEVICE FOR FEEDING TO A PAPERMAKING MACHINE |
JP8963573A JPS5431524B2 (en) | 1972-08-11 | 1973-08-09 | |
FR7329392A FR2195722B1 (en) | 1972-08-11 | 1973-08-10 | |
BR6145/73A BR7306145D0 (en) | 1972-08-11 | 1973-08-10 | PERFECT PROCESS AND DEVICE FOR SUPPLYING PULP STOCK TO A ROTATING FLUID SHEET AND PUMP FORMING DEVICE FOR USE IN THE PROCESS |
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 (en) |
JP (1) | JPS5431524B2 (en) |
BR (1) | BR7306145D0 (en) |
CA (1) | CA989222A (en) |
FR (1) | FR2195722B1 (en) |
GB (2) | GB1437636A (en) |
SE (1) | SE404614B (en) |
ZA (1) | ZA735391B (en) |
Cited By (8)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3912279A1 (en) * | 1989-04-14 | 1990-10-18 | Klein Schanzlin & Becker Ag | Guide wheel for centrifugal pump - has arrangement of different sized flow channels |
JP3281177B2 (en) * | 1994-05-26 | 2002-05-13 | 旭化成株式会社 | Yellowing-resistant deep-dyeing polyhexamethylene adipamide fiber and method for producing the same |
-
1972
- 1972-08-11 US US00279978A patent/US3823063A/en not_active Expired - Lifetime
-
1973
- 1973-02-28 CA CA164,873A patent/CA989222A/en not_active Expired
- 1973-08-06 GB GB3895975A patent/GB1437636A/en not_active Expired
- 1973-08-06 GB GB3720873A patent/GB1437635A/en not_active Expired
- 1973-08-08 SE SE7310866A patent/SE404614B/en unknown
- 1973-08-08 ZA ZA00735391A patent/ZA735391B/en unknown
- 1973-08-09 JP JP8963573A patent/JPS5431524B2/ja not_active Expired
- 1973-08-10 BR BR6145/73A patent/BR7306145D0/en unknown
- 1973-08-10 FR FR7329392A patent/FR2195722B1/fr not_active Expired
Cited By (9)
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 |
---|---|
SE404614B (en) | 1978-10-16 |
AU5882073A (en) | 1975-02-06 |
BR7306145D0 (en) | 1974-07-18 |
GB1437636A (en) | 1976-06-03 |
FR2195722B1 (en) | 1976-04-30 |
JPS5431524B2 (en) | 1979-10-08 |
ZA735391B (en) | 1975-03-26 |
FR2195722A1 (en) | 1974-03-08 |
GB1437635A (en) | 1976-06-03 |
CA989222A (en) | 1976-05-18 |
JPS4942906A (en) | 1974-04-23 |
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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 |