GB2146913A - A process and apparatus for purification of contaminated liquid and recovery of precious materials - Google Patents
A process and apparatus for purification of contaminated liquid and recovery of precious materials Download PDFInfo
- Publication number
- GB2146913A GB2146913A GB08325321A GB8325321A GB2146913A GB 2146913 A GB2146913 A GB 2146913A GB 08325321 A GB08325321 A GB 08325321A GB 8325321 A GB8325321 A GB 8325321A GB 2146913 A GB2146913 A GB 2146913A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bell
- mud
- liquid
- bells
- basin
- 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- Withdrawn
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 11
- 238000011084 recovery Methods 0.000 title claims description 9
- 238000000746 purification Methods 0.000 title 1
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 239000000376 reactant Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 239000000470 constituent Substances 0.000 abstract 1
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
-
- 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
- B01D29/09—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 filtering bands, e.g. movable between filtering operations
-
- 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
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
-
- 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
- B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
- B01D29/84—Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating
- B01D29/843—Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating by direct contact with a fluid
-
- 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
- B01D29/92—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 discharging filtrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/03—Processes of filtration using flocculating agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Filtration Of Liquid (AREA)
Abstract
Contaminated water is supplied through a pipe (1) to at least one basin (2) provided with a stirrer, into which a flocculant or filter aid from a metering device (3) is introduced. After mixing, a pump (5) conveys the liquid to a filter comprising a pervious support plate (7), a conveyor belt (8) and a roll of filtering paper (9), sliding under at least one bell (10), vertically movable under the action of suitable operating driving and controlling means (11, 12, 13, 14). The liquid is filtered through the filter paper (9) under the bells (10), and subsequently the bells are emptied of water and the mud which remains on the paper is dried by hot air from source 15. After lifting of the bells (10), the conveyor carries the paper and dried mud to a collection station (16). The mud and paper are later burnt to eliminate the contaminating materials and to recover possible precious constituents. <IMAGE>
Description
SPECIFICATION
A process and apparatus for depuration treatment of contaminated liquid and recovery of precious materials
This invention is concerned with a process and apparatus for depuration treatment of industrial contaminated liquid and possible recovery of precious materials with dehydration of muds which are intended to be burnt.
As is well known, liquid such as water from various industrial operations, such as goldsmith processing, motor vehicle washing, civil drains or sewers, fabric dyeing, fabric washing, skin tanning, galvanic baths and the like, is contaminated by organic and inorganic substances when it is discharged.
Therefore, the problem arises of purifying such discharge water to render it atoxic and thus no longer contaminating, by separating the various contaminating factors which, in the form of dry mud, can be then burnt and eliminated in suitable systems. These systems do not form part of the present invention, but are anyhow well known to those skilled in the art.
There is also the problem that water from industrial procesings sometimes has a content of precious materials and in any case reusable materials, whereby it would be highly advantageous to separate such recoverable materials from the purified water and muds to be destroyed or eliminated. This is particularly true in the filed of goldsmith industry, where it may occur that discharge water contains in not negligible percentage precious materials or metals, which should be accordingly advantageously recovered.
At present, processing systems are known for liquid depuration with mud dehydration, which require long processing times, several complicated operations as well as considerable floor space, whereby wide installation areas are required.
Due to their complexity, such systems are readily liable to failure and jamming, and because of their dimensions and operating costs, their installation is difficult at small craftsmans workshops.
It is the object of the present invention to provide a process which can obtain optimal results in short times, and which complies with the various standards in force against contamination, and an apparatus which can be installed in a small space, and has particularly easy and automatic operation withoutneeding skilled operators.
It is the object of said process and apparatus to provide for automatically separating all of the organic and inorganic substances from contaminated liquid, preferably further providing for the depuration operation of the liquid in a continuous step, which liquid is still in movement and accordingly without any shutdown of the depuration process (for example, mud precipitation).
The system is preferably provided with timers and automatic devices enabling contaminated liquid from any source and of any toxicity degree to be processed.
According to one aspect of the invention, I provide a process for depuration treatment of contaminated liquid and recovery of precious materials, in which contaminated liquid is introduced through a pipe into at least one processing basin provided with a stirrer, a chemical reactant from a metering device is introduced into the or each basin, the processed liquid being supplied from the or each basin to a mud dehydrating unit, the unit comprising at least one vertically movable bell, a conveyor belt and a filtering element under, and movable laterally relative to the or each bell, a filtering plate underlying the belt, and driving and controlling means, the processed liquid being passed through the bell or one of the bells, whereby the movable filtering element retains the solid particles as mud in the bell, with the cleaned liquid exiting from the underlying filtering plate, the mud being dried in the bell by a supply of hot air, the bell being lifted and the conveyor belt operated to carry the mud to a collection station to be subjected to a burning operation to eliminate the contaminating materials and to recover precious materials.
According to a further aspect of the invention, I provide apparatus for depuration treatment of contaminated liquid and recovery of precious materials, comprising an inlet pipe for supplying contaminated liquid to at least one processing basin, the or each basin being provided with a stirrer, a metering device for a chemical reactant for supply to the or each said processing basin, a pump provided with valve units and pressure gauge for carrying said processed liquid from the or each processing basin to a mud dehydrating unit, the unit comprising at least one vertically movable bell, a conveyor belt and a filtering element under, and movable laterally relative to, the or each bell, a filtering plate underlying the belt, driving and controlling means, including driving means for the conveyor belt and lifing and lowering means for the bell or bells, the processed liquid being passed through the bell or bells such that the filtering element retains the solid particles as mud in the bell or bells and the cleaned liquid exits from the filtering plate, the apparatus including means for supplying hot air to dry the mud collected in the bells, the driving and controlling means then being operated to carry the mud to a collection station to be subjected to a burning operation to eliminate the contaminating materials and recover precious materials.
The invention will now be further described with reference to an unrestrictive embodiment thereof to be considered in connection with the accompanying drawing, which is a general schematic view of the apparatus according to the invention. The apparatus is particularly useful for treating contaminated water.
In the drawing, reference numeral 1 designates an inlet pipe for contaminated water, which supplies the contaminated water to processing basins 2 and 4 by suitable valves. When the basin 2 has been filled, the system automatically meters, through a metering device, a chemical reactant of any suitable nature, as commercially available, into the basin 2 from a basin 3. It should be noted that the several basins designated at 2, 3 and 4 are each provided with a stirrer. Upon completion of introduction of the chemical reactant from the basin 3 to the basin 2, the conaminated water from the pipe 1 is caused to flow to the processing basin 4. After completion of the processing reaction in the basin 2, the pump 5 is automatically operated and supplies the processed water to the dehydrating unit, shown at the right of the drawing.
When the processed water in the basin 2 has been used up, the pump 5 will automatically draw the water from the basin 4, which has also already been processed with reactant, and will supply it to the dehydrating unit. Thus, the cycle may be continuous or anyhow without considerable breaks or interruptions.
Particularly, it should be noted that, while not being shown, a compressed air conduit or pipe could be connected to basin 3 to facilitate the exit of reactant to the basins 2 and 4.
Referring now to the righthand portion of the drawing, the schematic sectional view shows the automatic mud dehydrating unit for the water as obtained by the above described cyclic process.
This unit comprises a bilateral supporting frame, designated at 6, supporting a filtering plate 7, which underlies a conveyor belt 8, a roll of filter paper 9, and at least one vertically movable filtering bell 10.
The filter paper 9 is carried by the belt 8, both of which are laterally movable relative to the bells. As shown, there are provided three bells 10 having lifting and lowering means comprising hydraulic cylinders 11 controlled by a central unit 12 fitted with electric panel and a thrust meter or pressure switch 13, the whole mechanism being also controlled by the electric panel 14. The panel 14 also controls driving means for controlling operation of the conveyor belt 8.
Shortly, the operation is as follows.
As above mentioned, the previously processed water is drawn by pump 5 from the processing basins 2 or 4, depending on the cycle position. At this time, the filter paper 9 has been already inserted under the filtering bells 10 at sealing pressure
position shown at 101. The water is passed through the bells 10 and is thus filtered through the filter
paper 9, which retains in the bell as mud all of the solid particles, including those formed under the action of the reactants in said basins 2 or 4. The water exits in a cleaned state from the underlying filtering plate 7. As the mud is formed within the filtering bells 10, a pressure switch 18 senses an
increase in pressure.Once said pressure switch 18
has been calibrated to the desired exchange press
ure, compressed air enters through the pipe, desing
ated at 15, which will cause the outlet of the
remaining cleaned water. Upon completion of this;
operation, hot air is supplied through the heating
unit 17, which may be operated by any power supply, to dry the mud. At the end of this dehydration operation, the cylinders 11 are automatically
operated to move the bells 10 to the raised position
designated at 102, leaving on the paper and conveyor belt the filtered solid and dry mud ready for
burning.
Still automatically, the powered belt 8 carries the pressed mud on the filter paper 9 to the collecting tray 16, and moves fresh filter paper 9 under the bells 10. Now, the bells 10, as suitably driven, move again downward to position 101, under the control given by the electric panel 14, so that the whole operation is started again.
It clearly appears that the invention is not restricted to the details herein shown and/or described.
For example, as above mentioned, various reactants can be used in basin 3, such as active powder carbon in addition to diatomite and resins, as well as flocculants of any nature. The system could also be provided with various numbers of processing basins and bells, depending on the desired yield, the bells 10 being parallel or series connected. Similarly, the lifing means for said bells 10 could be of any kind, such as hydraulic, mechanical, pneumatic, etc. Likewise, instead of said filter paper 9, filtering fabrics or felts could be used, or a bed of filtering material, such as diatomite and the like.
It is also evident that such a system could be also used for filtering such alimentary substances as oil, beverages, strong and soft drinks and the like.
Therefore, the invention is not restricted to the details as herein shown and/or described, but also includes all of those changes or equivalent forms as implemented on the ground of the present inventive concept.
Claims (7)
1. A process for depuration treatment of contaminated liquid and recovery of precious materials, in which contaminated liquid is introduced through a pipe into at least one processing basin provided with a stirrer, a chemical reactant from a metering device is introduced into the or each basin, the processed liquid being supplied from the or each basin to a mud dehydrating unit, the unit comprising at least one vertically movable bell, a conveyor belt and a filtering element under, and movable laterally relative to, the or each bell, a filtering plate underlying the belt, and driving and controlling means, the processed liquid being passed through the bell or one of the bells, whereby the movable filtering element retains the solid particles as mud in the bell, with the cleaned liquid exiting from the underlying filtering plate, the mud being dried in the bell by a supply of hot air, the bell being lifted and the conveyor belt operated to carry the mud to a collection station to be subjected to a burning operation to eliminate the contaminating materials and to recover precious materials.
2. A process as claimed in claim 1, in which compressed air is supplied to the chemical reactant metering device.
3. Apparatus for depuration treatment of contaminated liquid and recovery of precious materials, comprising an inlet pipe for supplying contami
nated liquid to at least one processing basin, the or each basin being provided with a stirrer, a metering device for a chemical reactant for supply to the or each said processing basin, a pump provided with valve units and pressure gauge for carrying said processed liquid from the or each processing basin to a mud dehydrating unit, the unit comprising at least one vertically movable bell, a conveyor belt and a filtering element under, and movable laterally relative to, the or each bell, a filtering plate underlying the belt, driving and controlling means, including driving means for the conveyor belt and lifing and lowering means for the bell or bells, the processed liquid being passed through the bell or bells such that the filtering element retains the solid particles as mud in the bell or bells and the cleaned liquid exits from the filtering plate, the apparatus including means for supplying hot air to dry the mud collected in the bells, the driving and controlling means then being operated to carry the mud to a collection station to be subjected to a burning operation to eliminate the contaminating materials and recover precious materials.
4. Apparatus as claimed in claim 3, in which the filtering element comprises filtering paper unwound from a roll.
5. Apparatus as claimed in claim 3, in which the filtering element comprises a bed of filtering material.
6. A process for depuration treatment of contaminated liquid and recovery of precious materials substantially as described herein with reference to and as illustrated in the accompanying drawing.
7. Apparatus for depuration treatment of contaminated liquid and recovery of precious materials substantially as described herein with reference to and as illustrated in the accompanying drawing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833333027 DE3333027A1 (en) | 1983-09-13 | 1983-09-13 | Process and apparatus for treatment of waste waters and for recovery of valuable materials |
| GB08325321A GB2146913A (en) | 1983-09-13 | 1983-09-21 | A process and apparatus for purification of contaminated liquid and recovery of precious materials |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833333027 DE3333027A1 (en) | 1983-09-13 | 1983-09-13 | Process and apparatus for treatment of waste waters and for recovery of valuable materials |
| GB08325321A GB2146913A (en) | 1983-09-13 | 1983-09-21 | A process and apparatus for purification of contaminated liquid and recovery of precious materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8325321D0 GB8325321D0 (en) | 1983-10-26 |
| GB2146913A true GB2146913A (en) | 1985-05-01 |
Family
ID=25813955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08325321A Withdrawn GB2146913A (en) | 1983-09-13 | 1983-09-21 | A process and apparatus for purification of contaminated liquid and recovery of precious materials |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3333027A1 (en) |
| GB (1) | GB2146913A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2127673A1 (en) * | 1995-12-14 | 1999-04-16 | Solar Dynamics Ltd | Multistage apparatus and method for the continuous filtration of wastewater |
| WO2006022491A1 (en) * | 2004-08-23 | 2006-03-02 | Lee, Dae Hyung | Filtration system for waste water disposal having a revolving filter bed |
| US20150079890A1 (en) * | 2011-03-10 | 2015-03-19 | Scott S. STUTZMAN | Method of reducing silicosis caused by inhalation of silica-containing proppant, such as silica sand and resin-coated silica sand, and apparatus therefor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT399840B (en) * | 1992-06-16 | 1995-07-25 | Wienerberger Ziegelind | METHOD FOR PRODUCING BLOCKS FROM CERAMIC MATERIAL |
| CN112370850A (en) * | 2020-10-26 | 2021-02-19 | 衡阳市大宇锌业有限公司 | A stirring filter equipment for zinc sulfate solution deironing |
| CN112642202B (en) * | 2020-12-23 | 2022-04-15 | 蚌埠市阳禾麻油有限公司 | Resetting device for cleaning sesame oil filter |
-
1983
- 1983-09-13 DE DE19833333027 patent/DE3333027A1/en not_active Withdrawn
- 1983-09-21 GB GB08325321A patent/GB2146913A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2127673A1 (en) * | 1995-12-14 | 1999-04-16 | Solar Dynamics Ltd | Multistage apparatus and method for the continuous filtration of wastewater |
| WO2006022491A1 (en) * | 2004-08-23 | 2006-03-02 | Lee, Dae Hyung | Filtration system for waste water disposal having a revolving filter bed |
| US20150079890A1 (en) * | 2011-03-10 | 2015-03-19 | Scott S. STUTZMAN | Method of reducing silicosis caused by inhalation of silica-containing proppant, such as silica sand and resin-coated silica sand, and apparatus therefor |
| US9688492B2 (en) * | 2011-03-10 | 2017-06-27 | Ksw Environmental, Llc | Method of reducing silicosis caused by inhalation of silica-containing proppant, such as silica sand and resin-coated silica sand, and apparatus therefor |
| US10532900B1 (en) | 2011-03-10 | 2020-01-14 | Ksw Environmental, Llc | Method of reducing silicosis caused by inhalation of silica-containing proppant, such as silica sand and resin-coated silica sand, and apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8325321D0 (en) | 1983-10-26 |
| DE3333027A1 (en) | 1985-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |