GB2366745A - Separator for separating glycol or other de-icing additives from water - Google Patents
Separator for separating glycol or other de-icing additives from water Download PDFInfo
- Publication number
- GB2366745A GB2366745A GB0022574A GB0022574A GB2366745A GB 2366745 A GB2366745 A GB 2366745A GB 0022574 A GB0022574 A GB 0022574A GB 0022574 A GB0022574 A GB 0022574A GB 2366745 A GB2366745 A GB 2366745A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glycol
- water
- tank
- separation system
- water separation
- 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.)
- Granted
Links
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000000654 additive Substances 0.000 title abstract description 5
- 238000011282 treatment Methods 0.000 claims abstract description 25
- 238000005273 aeration Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims abstract 2
- 238000011221 initial treatment Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims 8
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000005276 aerator Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/045—Breaking emulsions with coalescers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
De-icing additives eg glycol are removed from water in three treatment stages. The first stage consists of a balancing tank 1,2 with an aerator 5 and an area 17 for sludge settlement. The aeration reduces the globule size, and maintains the mixture in an aerobic state. The second stage is an inclined plate separator 16 preceded and followed by broadcrested weirs 7,10, which coalesce the glycol globules into larger globules. The third stage is a honeycombed tank of vertical slots 12 capped by broadcrested weirs 13. Glycol and the other de-icers, being heavier than water, will collect at the sloping bottom of the tank in the area 14. Each stage may be constituted by a plurality of treatment tanks in parallel. The separator is used to separate glycol and other de-icing additives from the stormwater removed from airport runways before it is released into a watercourse.
Description
<Desc/Clms Page number 1> GLYCOL/WATER SEPARATOR A Glycol and other de-icers mixed with water treatment system and a method of the removal from water of the de-icers and Glycol This invention, in general, relates to a method of removing and processing de-icing additives in water and is particularly but not exclusively applicable to a system for use in airport and industrial environments.
The treatment of effluent containing de-icers is necessary in order to separate de-icers from suspension in water prior to discharge into a watercourse such as a stream, a lake, a river, the sea, or for reuse. Present-day effluent containing de-icers is also discharged to sewage works.
Unfortunately, present day systems for the removal of stormwater from airport runways allow de-icers particularly glycol to coalesce and remain in the system. These systems usually enter surrounding watercourses. Coalesced Glycol frequently is washed through the system during a summer rain storm causing high levels of pollution in the recipient watercourse.
The first aspect of the present invention is to provide a balancing tank to even the flow as primary treatment, a Separator as secondary treatment, and a deicer collection tank as the tertiary treatment (Fig. 1).
Preferably the primary tank will contain aerators and a settlement section.
The secondary tank will consist of a separator using the principles I established in my UK Patent No. 1484727: Improvements in and relating to the 30 treatment of liquids - inventor David Alan Burt.
<Desc/Clms Page number 2>
The tertiary tank will contain a system for removal of Glycol and other de-icers from the bottom of this tank for return to the primary tank or removal for reuse. Exemplary embodiments of the present invention will now be described with reference to the accompanying sketches, in which Fig. 1 is a longitudinal section of the system.
Fig. 2 is a cross-section of the primary treatment tank according to a preferred embodiment of the present invention.
Fig. 3 is a cross-section of the secondary treatment tank. Fig. 4 is a cross-section of the tertiary treatment tank.
The primary treatment tank will have generally but specifically two sections (1 & 2). The inlet (3) particularly but not exclusively will be above the level of the outlet (4) to allow as much balancing volume as possible.
The first chamber has aerators (5) not specifically but generally just above the bottom of the partition (6). The upward flow in section (2) is restricted by the outlet (4) which connects the primary treatment tank to the secondary treatment separator.
The secondary treatment separator (Patent No. 1484727) will coalesce the microscopic globules of the de-icing additives into large globules at the upstream broadcrested weir (7). These globules, not specifically but generally, will have a size greater than 200 micron. De-icers have a specific gravity greater than 1 and large globules will flow to the bottom (8) of the Separator. Smaller globules will follow 3
<Desc/Clms Page number 3>
the liquid flow path (9).
Further coalescence will occur to these smaller globules at the downstream broadcrested weir (10).
The outlet (11) will constrict the flow which passes to the tertiary treatment tank.
The tertiary treatment consists, generally but not specifically, of a honeycombed tank of vertical slots (12) capped by broadcrested weirs (13). This treatment tank entraps the globules heavier than water, and will coalesce these globules at the bottom of the slots (14).
The bottom section of this tank will, generally but not specifically, be sloped at about 55 degrees in order to concentrate the heavier than water globules (Fig. 4).
An important aspect of the effective operation of the de-icers treatment system is to aerate the influent of de-icers mixed with water in order to reduce the combined globule size. This must preferably, but not exclusively, be followed by treatment to coagulate the different molecules into large globules which will be separated according to their differing specific gravity.
In a further aspect of the present invention, the primary tank will be capable of accepting a variable volume of influent whilst maintaining a steady flow through the remainder of the system.
The primary tank will have aeration of sufficient volume to reduce the globule size of the de-icers, not explicitly but preferably to less than 1 micron, and to maintain an oxygen content of the liquor such that it will remain in an aerobic state.
<Desc/Clms Page number 4>
In a further aspect, the primary tank will allow settlement of any resulting sludges that are released due to aeration operation in this primary tank.
The secondary process separator adjoining the primary process tank will coagulate the deicer globules into larger globules such that their specific gravity will be heavier than water.
The tertiary treatment tank will remove these de-icers such that they can be removed from the process system, to such a degree that de-icer-free water will flow out of the process system's tertiary treatment tank, which will be permitted to enter a watercourse without further treatment.
It will naturally be appreciated that the above description has been given by way of example only and modifications in detail may be made within the scope of the present invention. For example, whilst the present invention is generally described in a single primary tank, secondary tank and tertiary tank operation (Fig. 1), the underlying principles of each of these operations can be applied to multiple tanks in each of these operations, such that there may be one large primary tank, five secondary treatment tanks in parallel and ten tertiary treatment tanks in parallel. The number of tanks in each stage that would be required is dependant upon the influent flow to the system, the level/volume of glycol and other pollutants, sludges, etc. in that flow.
<Desc/Clms Page number 5>
Claims (10)
- CLAIMS 1. A Glycol/Water separation system comprising primary treatment system communicating with a secondary treatment system which communicates with a tertiary treatment system. (Fig. 1)
- 2. The Glycol/Water separation system of Claim 1 wherein the primary treatment consists of aeration (5) and sludge settlement (17).
- 3. The Glycol/Water separation system of Claim 2 will remain aerobic in order to reduce sludges.
- 4. The Glycol/Water separation system of Claim 1 wherein the secondary treatment consists of a separation system which coalesces like molecules into large globules (7).
- 5. The Glycol/Water separation system of Claim 4 will utilise the technology of Patent No. 1484727 (7) (8) (9) (10) (16).
- 6. The Glycol/Water separation system of Claim 1 wherein the tertiary treatment consists of a collector and accumulator of Glycol and other globules that have a specific gravity greater than water.
- 7. The Glycol/Water separation system of Claim 6 will consist of a multiplicity of broadcrested weirs in series (13).
- 8. The weirs of Claim 7 will be supported by vertical spacers, sealed at the sides and extending down to the tank bottom (12).
- 9. The collection and removal system of Glycol of Claims 7 and 8 will be from the bottom of the spacers at tank bottom (14).
- 10. Glycol-free water will flow out of the system of Claim 1 after passing over the last broadcrested weir of Claim 7 (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0022574A GB2366745B (en) | 2000-09-14 | 2000-09-14 | Glycol/water separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0022574A GB2366745B (en) | 2000-09-14 | 2000-09-14 | Glycol/water separator |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0022574D0 GB0022574D0 (en) | 2000-11-01 |
| GB2366745A true GB2366745A (en) | 2002-03-20 |
| GB2366745B GB2366745B (en) | 2005-02-02 |
Family
ID=9899465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0022574A Expired - Fee Related GB2366745B (en) | 2000-09-14 | 2000-09-14 | Glycol/water separator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2366745B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1247728A (en) * | 1967-06-27 | 1971-09-29 | Neptune Microfloc Inc | Method and apparatus for separation of solids from liquids |
| GB1484727A (en) * | 1974-04-08 | 1977-09-01 | Burt D | Treatment of liquids |
| US4579655A (en) * | 1983-10-07 | 1986-04-01 | Degremont | Apparatus for treating water by flocculation and/or crystalline precipitation, settling and sludge recycling |
| US5269933A (en) * | 1991-09-14 | 1993-12-14 | Dornier Gmbh | Method for separating a fluid mixture |
| WO1994015691A1 (en) * | 1993-01-07 | 1994-07-21 | David James Grantham | A hydraulic separation device |
| GB2275210A (en) * | 1993-02-17 | 1994-08-24 | Oekologia Beteiligungs Handels | Regenerating of degreasing liquid |
-
2000
- 2000-09-14 GB GB0022574A patent/GB2366745B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1247728A (en) * | 1967-06-27 | 1971-09-29 | Neptune Microfloc Inc | Method and apparatus for separation of solids from liquids |
| GB1484727A (en) * | 1974-04-08 | 1977-09-01 | Burt D | Treatment of liquids |
| US4579655A (en) * | 1983-10-07 | 1986-04-01 | Degremont | Apparatus for treating water by flocculation and/or crystalline precipitation, settling and sludge recycling |
| US5269933A (en) * | 1991-09-14 | 1993-12-14 | Dornier Gmbh | Method for separating a fluid mixture |
| WO1994015691A1 (en) * | 1993-01-07 | 1994-07-21 | David James Grantham | A hydraulic separation device |
| GB2275210A (en) * | 1993-02-17 | 1994-08-24 | Oekologia Beteiligungs Handels | Regenerating of degreasing liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2366745B (en) | 2005-02-02 |
| GB0022574D0 (en) | 2000-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20090914 |