GB618196A - Improvements in connection with filters - Google Patents

Improvements in connection with filters

Info

Publication number
GB618196A
GB618196A GB32436/46A GB3243646A GB618196A GB 618196 A GB618196 A GB 618196A GB 32436/46 A GB32436/46 A GB 32436/46A GB 3243646 A GB3243646 A GB 3243646A GB 618196 A GB618196 A GB 618196A
Authority
GB
United Kingdom
Prior art keywords
air
stem
water
nozzles
floor
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
GB32436/46A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB32436/46A priority Critical patent/GB618196A/en
Publication of GB618196A publication Critical patent/GB618196A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
    • B01D24/12—Downward filtration, the filtering material being supported by pervious surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
    • B01D24/14—Downward filtration, the container having distribution or collection headers or pervious conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4626—Construction of spray heads specially adapted for regeneration of the filter material or for filtrate discharging

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nozzles (AREA)

Abstract

618,196. Filters. CANDY, F. P. Nov. 1, 1946. No. 32436. [Class 46] For the operation, backwashing, and air-scouring, of filters of discrete materials, there are provided water nozzles having openings which are larger than the sand grains and which are protected by a packing layer, and air nozzles having openings which are smaller than the sand grains and which discharge the air into the sand above a sufficiency of the packing, the air nozzles having hollow stems which depend into the common supply of water and air and have apertures for the entry of the air. As shown in Fig. 1, a combined air and water nozzle located in a reticulation pipe 2 comprises a slotted dome 3 attached to a central member 4 screwing on to the common stem 7 and provided, with holes 5, the dome base being closed by a disc 15. The stem 7 has water openings 6 in the lower part and air openings 8, 8A in the upper part above a partition 16, the air passing out through openings 9 into an annular space 10 between the stem and a ring 11. The ring is provided with projections on its upper and lower surfaces and preferably also around its periphery to allow the air to escape but prevent the ingress of sand. The floor 1 of the filter is covered with packing material which may extend half way up the air nozzle, a layer of filtering sand being laid on top, for use with a filter having a false floor instead of a pipe reticulation system, separate air and water nozzles are provided, each having a relatively long stem, the air nozzles being set with most of the stem above the floor, the lower end being closed and lateral air-holes provided below the floor-level. The water nozzles have only the domed part above the floor-level, and the stem is open at the bottom only. This arrangement may be adopted when reticulation pipes are embedded in e.g. a concrete floor. An alternative arrangement combining air and water nozzles is shown in Fig. 4, where waste water enters by the bottom open end of the stem 7 and air by holes 8 and 8A into the stem 7A. A further combined arrangement is shown in Fig. 3, in which water enters the open end of the stem 7 and air enters through holes 8 and 8A. Specification 534,312 is referred to in the Provisional Specification.
GB32436/46A 1946-11-01 1946-11-01 Improvements in connection with filters Expired GB618196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB32436/46A GB618196A (en) 1946-11-01 1946-11-01 Improvements in connection with filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32436/46A GB618196A (en) 1946-11-01 1946-11-01 Improvements in connection with filters

Publications (1)

Publication Number Publication Date
GB618196A true GB618196A (en) 1949-02-17

Family

ID=10338576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32436/46A Expired GB618196A (en) 1946-11-01 1946-11-01 Improvements in connection with filters

Country Status (1)

Country Link
GB (1) GB618196A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177612B (en) * 1962-06-20 1964-09-10 Basf Ag Nozzle and nozzle attachment for filter bases loaded with grainy filter media, especially for water purification systems
FR2425261A1 (en) * 1978-05-10 1979-12-07 Sulzer Ag DRAINAGE FILTRATION STATION
EP0068315A2 (en) * 1981-06-17 1983-01-05 Blue Circle Projects (Proprietary) Limited Distribution filter nozzles and filters incorporating same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177612B (en) * 1962-06-20 1964-09-10 Basf Ag Nozzle and nozzle attachment for filter bases loaded with grainy filter media, especially for water purification systems
FR2425261A1 (en) * 1978-05-10 1979-12-07 Sulzer Ag DRAINAGE FILTRATION STATION
EP0068315A2 (en) * 1981-06-17 1983-01-05 Blue Circle Projects (Proprietary) Limited Distribution filter nozzles and filters incorporating same
EP0068315A3 (en) * 1981-06-17 1983-07-06 Blue Circle Projects (Proprietary) Limited Distribution filter nozzles and filters incorporating same

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