GB2074050A - Method of separation of polluted liquids - Google Patents

Method of separation of polluted liquids Download PDF

Info

Publication number
GB2074050A
GB2074050A GB8111656A GB8111656A GB2074050A GB 2074050 A GB2074050 A GB 2074050A GB 8111656 A GB8111656 A GB 8111656A GB 8111656 A GB8111656 A GB 8111656A GB 2074050 A GB2074050 A GB 2074050A
Authority
GB
United Kingdom
Prior art keywords
coal
liquid
grains
barren rock
directed
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.)
Withdrawn
Application number
GB8111656A
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.)
KOPALNIA WEGLA KAMIENNEGO GEN
Original Assignee
KOPALNIA WEGLA KAMIENNEGO GEN
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 KOPALNIA WEGLA KAMIENNEGO GEN filed Critical KOPALNIA WEGLA KAMIENNEGO GEN
Publication of GB2074050A publication Critical patent/GB2074050A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/005—General arrangement of separating plant, e.g. flow sheets specially adapted for coal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/002—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external filters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Treatment Of Sludge (AREA)

Abstract

In a method of separation of polluted liquids, particularly in coal sludge circulation systems, liquid containing small suspended grains of coal and barren rock is passed to rotodynamic multihydrocyclones (1) where small coal grains are separated from small barren rock grains; the liquid (8) outflowing from the multihydrocyclones containing coal grains is directed onto a dewatering screen (2) where the next stage of dewatering takes place, whereas the overflowing liquid containing barren rock grains is directed to a sedimentation tank (3); the liquid overflowing from the sedimentation tank being technologically pure is introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium. <IMAGE>

Description

SPECIFICATION Method of separation of polluted liquids This invention relates to a method of separation of polluted liquids, especially in coal sludge circulation systems used in coal concentration processes in the coal industry, particularly in coal mines where hydraulic filling is used.
There is known from Polish patent specification No. 91,095 a method of separation of suspended solids in a liquid, as well as a multihydrocyclone for the implementation thereof. In this method of separ ation of suspended solids in a liquid, a set of hydrocyclones are arranged in groups one above another, wherein the hydrocyclones are provided with longitudinal swirl chambers consisting of a receiving portion provided with a liquid inlet and a collected fraction outlet and with a rejected fraction zone situated opposite to the latter and provided with an outlet for rejected fraction.In the method at least one portion of liquid with suspended solids to be separated is supplied to the hydrocyclone inlets, the liquid flowing from the lowest to the highest group of hydrocyclones arranged above one another, this liquid being introduced into the longitu dinal swirl chambers and distributed therein in such a way as to obtain the collected and rejected fractions, these fractions being next drawn off by means of outlet stub pipes, both the separated fractions being collected separately from each other.
The liquid with suspended solids is supplied to the hydrocyclone inlets with an average flow velocity ranging from 0.3 up to 3 m per sec. One portion of the liquid with suspended solids is supplied to the individual hydrocyclones in the set in an upward direction of flow.
The present invention aims to develop such a method of separation of polluted liquids, particularly in coal sludge circulation systems, which would make possible the separation of coal grains from barren rock grains with simultaneous effective filt lering.
The present invention provides a method of separation of a polluted liquid, particularly in a coal sludge circulation system, wherein liquid containing small suspended coal grains and barren rock grains is passed to rotodynamic multihydroyclones where small coal grains are separated from barren rock grains, the liquid outflowing from the said multihy -drocyclones being conveyed to a de-watering screen where a further stage of dewatering of coal takes place, while overflowing liquid containing barren rock grains is directed to a sedimentation tank, the overflow liquid of the sedimentation tank being introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium.
Thus in the method according to the invention a liquid with small suspended grains of coal and barren rock is directed to rotodynamic multihydrocy clones, where the coal grains are separated from the barren rock grains. The liquid containing suspended coal grains is next directed to a dewatering screen, where coal is still further dewatered and the liquid containing the suspended grains of barren rock is directed to a gravity sedimentation tank where sedimentation takes place. The overflow of this tank is technologically pure water which is introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium.
The invention will be further described, by way of example only, with reference to the accompanying drawing, which is a diagrammatic illustration of an apparatus for carrying out the method according to the invention in a coal sludge circulation system.
As shown in the drawing, a liquid with suspended small grains of coal and barren rock is supplied to roto-dynamic multihydrocyclones 1 where small coal grains are separated from barren rock grains.
The liquid 8 outflowing from the multihydrocyclones containing coal grains is directed onto a dewatering screen 2 where the next stage of dewatering of coal is effected. The overflow 7 of the screen 2 containing barren rock grains is directed to a gravity sedimentation tank 3. The overflow of the tank 3 is a technologically pure liquid which is introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium.
The overflow of the sedimentation tank 3 is conveyed to a tank 6 of technologically pure water and the barren rock concentrate settled in the tank 3 is directed through a filter 4 to a waste store 5.
The application of the present invention makes possible an effective separation of coal grains from barren rock grains with simultaneous filtering.
Moreover, it also prevents losses of coal due to full recovery of coal contained in coal sludge. The method according to the invention also enables the whole coal concentration process to be considerably accelerated and the circulation of the medium to be simplified, which gives visible economic advantages and improves work safety and hygiene conditions.
1. A method of separation of a polluted liquid, particularly in a coal sludge circulation system, wherein liquid containing small suspended coal grains and barren rock grains is passed to rotodynamic multihydrocyclones where small coal grains are separated from barren rock grains, the liquid outflowing from the said multihydrocyclones being conveyed to a dewatering screen where a further stage of dewatering of coal takes place, while overflowing liquid containing barren rock grains is directed to a sedimentation tank, the overflow liquid of the sedimentation tank being introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Method of separation of polluted liquids This invention relates to a method of separation of polluted liquids, especially in coal sludge circulation systems used in coal concentration processes in the coal industry, particularly in coal mines where hydraulic filling is used. There is known from Polish patent specification No. 91,095 a method of separation of suspended solids in a liquid, as well as a multihydrocyclone for the implementation thereof. In this method of separ ation of suspended solids in a liquid, a set of hydrocyclones are arranged in groups one above another, wherein the hydrocyclones are provided with longitudinal swirl chambers consisting of a receiving portion provided with a liquid inlet and a collected fraction outlet and with a rejected fraction zone situated opposite to the latter and provided with an outlet for rejected fraction.In the method at least one portion of liquid with suspended solids to be separated is supplied to the hydrocyclone inlets, the liquid flowing from the lowest to the highest group of hydrocyclones arranged above one another, this liquid being introduced into the longitu dinal swirl chambers and distributed therein in such a way as to obtain the collected and rejected fractions, these fractions being next drawn off by means of outlet stub pipes, both the separated fractions being collected separately from each other. The liquid with suspended solids is supplied to the hydrocyclone inlets with an average flow velocity ranging from 0.3 up to 3 m per sec. One portion of the liquid with suspended solids is supplied to the individual hydrocyclones in the set in an upward direction of flow. The present invention aims to develop such a method of separation of polluted liquids, particularly in coal sludge circulation systems, which would make possible the separation of coal grains from barren rock grains with simultaneous effective filt lering. The present invention provides a method of separation of a polluted liquid, particularly in a coal sludge circulation system, wherein liquid containing small suspended coal grains and barren rock grains is passed to rotodynamic multihydroyclones where small coal grains are separated from barren rock grains, the liquid outflowing from the said multihy -drocyclones being conveyed to a de-watering screen where a further stage of dewatering of coal takes place, while overflowing liquid containing barren rock grains is directed to a sedimentation tank, the overflow liquid of the sedimentation tank being introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium. Thus in the method according to the invention a liquid with small suspended grains of coal and barren rock is directed to rotodynamic multihydrocy clones, where the coal grains are separated from the barren rock grains. The liquid containing suspended coal grains is next directed to a dewatering screen, where coal is still further dewatered and the liquid containing the suspended grains of barren rock is directed to a gravity sedimentation tank where sedimentation takes place. The overflow of this tank is technologically pure water which is introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium. The invention will be further described, by way of example only, with reference to the accompanying drawing, which is a diagrammatic illustration of an apparatus for carrying out the method according to the invention in a coal sludge circulation system. As shown in the drawing, a liquid with suspended small grains of coal and barren rock is supplied to roto-dynamic multihydrocyclones 1 where small coal grains are separated from barren rock grains. The liquid 8 outflowing from the multihydrocyclones containing coal grains is directed onto a dewatering screen 2 where the next stage of dewatering of coal is effected. The overflow 7 of the screen 2 containing barren rock grains is directed to a gravity sedimentation tank 3. The overflow of the tank 3 is a technologically pure liquid which is introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium. The overflow of the sedimentation tank 3 is conveyed to a tank 6 of technologically pure water and the barren rock concentrate settled in the tank 3 is directed through a filter 4 to a waste store 5. The application of the present invention makes possible an effective separation of coal grains from barren rock grains with simultaneous filtering. Moreover, it also prevents losses of coal due to full recovery of coal contained in coal sludge. The method according to the invention also enables the whole coal concentration process to be considerably accelerated and the circulation of the medium to be simplified, which gives visible economic advantages and improves work safety and hygiene conditions. CLAIMS
1. A method of separation of a polluted liquid, particularly in a coal sludge circulation system, wherein liquid containing small suspended coal grains and barren rock grains is passed to rotodynamic multihydrocyclones where small coal grains are separated from barren rock grains, the liquid outflowing from the said multihydrocyclones being conveyed to a dewatering screen where a further stage of dewatering of coal takes place, while overflowing liquid containing barren rock grains is directed to a sedimentation tank, the overflow liquid of the sedimentation tank being introduced again into the closed coal concentration process cycle, the whole process being effected in a closed cycle of liquid medium.
2. A method as claimed in claim 1, wherein the overflow of the sedimentation tank is conveyed to a tank of technologically pure water, and wherein barren rock concentrate settled in the sedimentation tank is directed through a filter to waste.
3. A method according to claim 1, substantially as herein described with reference to the accompanying drawing.
GB8111656A 1980-04-14 1981-04-13 Method of separation of polluted liquids Withdrawn GB2074050A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL22348080A PL223480A1 (en) 1980-04-14 1980-04-14
AU69863/81A AU6986381A (en) 1980-04-14 1981-04-27 Separation of coal polluted liquids with hydrocyclones

Publications (1)

Publication Number Publication Date
GB2074050A true GB2074050A (en) 1981-10-28

Family

ID=34195156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8111656A Withdrawn GB2074050A (en) 1980-04-14 1981-04-13 Method of separation of polluted liquids

Country Status (4)

Country Link
AU (1) AU6986381A (en)
FR (1) FR2480133A1 (en)
GB (1) GB2074050A (en)
PL (1) PL223480A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331322A1 (en) * 1992-10-21 1994-04-28 Austrian Energy & Environment Sludge cleaning - uses counterflow of water with intensive mixing to remove light matter at the overflow and heavy matter from the under flow
EP3375536A1 (en) * 2017-03-13 2018-09-19 CDE Global Limited Apparatus for washing and grading sand and aggregate
CN113528191A (en) * 2021-08-01 2021-10-22 中科聚信洁能热锻装备研发股份有限公司 Coal gas circulating fluidized bed for finely separating coke slag

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331322A1 (en) * 1992-10-21 1994-04-28 Austrian Energy & Environment Sludge cleaning - uses counterflow of water with intensive mixing to remove light matter at the overflow and heavy matter from the under flow
EP3375536A1 (en) * 2017-03-13 2018-09-19 CDE Global Limited Apparatus for washing and grading sand and aggregate
US10272443B2 (en) 2017-03-13 2019-04-30 Cde Global Limited Apparatus for washing and grading sand and aggregate
US11103879B2 (en) 2017-03-13 2021-08-31 Cde Global Limited Apparatus for washing and grading sand and aggregate
CN113528191A (en) * 2021-08-01 2021-10-22 中科聚信洁能热锻装备研发股份有限公司 Coal gas circulating fluidized bed for finely separating coke slag

Also Published As

Publication number Publication date
PL223480A1 (en) 1981-10-16
AU6986381A (en) 1982-11-18
FR2480133A1 (en) 1981-10-16

Similar Documents

Publication Publication Date Title
US5021165A (en) Oil and water separating system with hydrocyclone and floatation device
EP0888246B1 (en) Flotation apparatus and process
NO138548B (en) SEPARATOR.
US5093006A (en) Liquid separator
FR2478489B1 (en) PROCESS AND DEVICE FOR SEPARATING PARTICLES IN A FLUID, PARTICULARLY FOR THE PURIFICATION OF PAPER SUSPENSIONS
US3786919A (en) Method and apparatus for concentrating ore pulps
FI66296B (en) CONTAINER SEPARATIONSANORDNING OCH FOERFARANDE FOER SEPARERING AV I EN VAETSKEBLANDNING INGAOENDE LAETTA OCH TUNGA VAETSKEFORMIGA FRAKTIONER
GB1287360A (en) Process and apparatus for sedimentation of solid impurities from liquids
US4096060A (en) Method utilizing plug flow for separating solids from liquid
US3423313A (en) High solid content slurry separating method
KR200220590Y1 (en) Sewage treatment centrifuge with separation of suspended solids
GB2074050A (en) Method of separation of polluted liquids
CA2128729C (en) Dissolved air flotation
US3246762A (en) Apparatus for the treatment of contaminated liquid wastes by flocculation and clarification
CN114477494A (en) Phenol-ammonia wastewater treatment device and process for degassing and light and heavy oil grading treatment
US2585808A (en) Water purification apparatus
SU994014A1 (en) Unit for filtration cleaning of waste waters
US5792363A (en) Method for removing solids from a contaminated liquid
RU2045982C1 (en) Well production preparation plant
RU2143952C1 (en) Method of final extraction or minerals from pulp feed-line of mineral raw material concentration wastes and plant for final extraction of useful components from pulp flow
RU2022933C1 (en) Device for purification of oil-containing waste water
RU2174449C1 (en) Method of hydraulic classification of fine-fraction materials
RU2214366C2 (en) Facility clearing liquid from suspended substances and oil products
SU971500A1 (en) Apparatus for dehydrating slime
RU8349U1 (en) FILTRATION-FLOTATION WATER TREATMENT PLANT

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)