GB787737A - Improvements in or relating to strainer means in treatment towers - Google Patents

Improvements in or relating to strainer means in treatment towers

Info

Publication number
GB787737A
GB787737A GB22248/56A GB2224856A GB787737A GB 787737 A GB787737 A GB 787737A GB 22248/56 A GB22248/56 A GB 22248/56A GB 2224856 A GB2224856 A GB 2224856A GB 787737 A GB787737 A GB 787737A
Authority
GB
United Kingdom
Prior art keywords
strainer
slot
scraper
slurry
relating
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
Application number
GB22248/56A
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.)
Repola Oy
Original Assignee
Rauma Repola Oy
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 Rauma Repola Oy filed Critical Rauma Repola Oy
Publication of GB787737A publication Critical patent/GB787737A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B01D29/036—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting ring shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/668—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with valves, e.g. rotating valves for coaxially placed filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/86—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/04—Flat screens

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

787,737. Filters. RAUMA-REPOLA OY. May 17, 1954 [May 28, 1953], No. 22248/56. Divided out of 787,736. Class 46. Slurry is introduced at 10, Fig. 2, to an annular distributing duct 9, Fig. 1, which communicates by a continuous uninterrupted slot 13 with the upper surface of a strainer 2. The slot 13 is formed between the lower edge of a ring 12 and the upper surface of the strainer. The parts of the strainer surface not occupied by rotating scrapers 4 are covered by a dense layer of solids (e.g., fibrous matter) so that the slurry can reach the strainer surface only through slots 7 (one in the outer wall of each scraper) and the hollow interior of each scraper. Each scraper has a down-turned forward end 5 forming a blade and an open rear end, and preferably a projecting member 8 to guide the slurry into the slot 7. The continuous slot 13 is preferably below the level of the inlet conduit 10.
GB22248/56A 1953-05-28 1954-05-17 Improvements in or relating to strainer means in treatment towers Expired GB787737A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI787737X 1953-05-28
FI787736X 1953-05-28

Publications (1)

Publication Number Publication Date
GB787737A true GB787737A (en) 1957-12-18

Family

ID=32963834

Family Applications (2)

Application Number Title Priority Date Filing Date
GB14409/54A Expired GB787736A (en) 1953-05-28 1954-05-17 Improvements in or relating to straining means in treatment towers
GB22248/56A Expired GB787737A (en) 1953-05-28 1954-05-17 Improvements in or relating to strainer means in treatment towers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB14409/54A Expired GB787736A (en) 1953-05-28 1954-05-17 Improvements in or relating to straining means in treatment towers

Country Status (1)

Country Link
GB (2) GB787736A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110939006A (en) * 2019-12-25 2020-03-31 马鞍山斯博尔机械技术服务有限公司 Paper pulp filter equipment of waste paper recovery processing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107617261A (en) * 2017-10-30 2018-01-23 平湖市万顺达机械有限公司 A kind of sewage-treatment plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110939006A (en) * 2019-12-25 2020-03-31 马鞍山斯博尔机械技术服务有限公司 Paper pulp filter equipment of waste paper recovery processing
CN110939006B (en) * 2019-12-25 2021-10-15 海南奕德新材料科技有限公司 Paper pulp filter equipment of waste paper recovery processing

Also Published As

Publication number Publication date
GB787736A (en) 1957-12-18

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