CN101810942B - Oil-water separation method - Google Patents
Oil-water separation method Download PDFInfo
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- CN101810942B CN101810942B CN200910078236A CN200910078236A CN101810942B CN 101810942 B CN101810942 B CN 101810942B CN 200910078236 A CN200910078236 A CN 200910078236A CN 200910078236 A CN200910078236 A CN 200910078236A CN 101810942 B CN101810942 B CN 101810942B
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Abstract
The invention provides an oil-water separation method. The method is characterized by comprising the following steps of: performing pre-treatment, such as cooling and coarse filtration, of oil-containing condensed water; passing the condensation water through a resin bed layer so as to expand oil-type emulsion fine drops in the condensed water and separate part of the oil-type emulsion fine drops in form of big oil drops, making the big oil drops pass through a cone-shaped material channel or hyperbola-shaped material channel from the bottom to the top for further separation; and performing oil-water separation, collecting product water from the lower layer, and discharging the big oil drops and a smaller amount of water from an oil outlet, wherein the resin is long chain alkyl group-containing crosslinked polypropylene resin, the molecular formula of the resin is (CH2-CH)nCONHCH2NHR, the R is the alkyl group containing 8 to 20 carbon atoms, the included angle between the trapezoidal edge of the cone-shaped material channel and the horizontal line is 20 to 60 degrees, the ratio of the diameter of an outlet of the cone-shaped channel to the diameter of a cylinder body is 1-4:10, the diameter ratio of an outlet to an inlet of the hyperbola-shaped material channel is 0.2-0.6:1, the ratio of the diameter of the outlet of the hyperbola-shaped material channel to the minimum diameter of the channel is more than or equal to 1.1, and the ratio of the vertical heights of the inlet and the outlet of the channel to the minimum diameter of the channel is 1-5:1.
Description
Technical field
The present invention relates to a kind of method of water-oil separating, relate to the oil-water separation method that is used for condensed water furtherly.
Background technology
Water-oil separating is usually used in handling oily waste water, utilizes the profit density contrast to separate usually, like air supporting choosing, cyclone filter; Active carbon or ultrafiltration fiber filter are also arranged, oleophylic metal packing, chemical demulsification; Heating and separating, film are separated, and the variation fluid mechanics principle of use device structures such as design weir flow plate, porous plate, multi-cavity chamber, mechanical presses is separated etc.; Be mainly used in the processing of oil content, reach oil content less than 100ppm than higher oily waste water.
Summary of the invention
The condensed water oil-water separation method that the purpose of this invention is to provide a kind of better effects if.
Condensed water oil-water separation method provided by the invention; It is characterized in that at first passing through resin bed after the preliminary treatment such as the cooling of oil-containing condensate process, coarse filtration; Come out with the isolated in form of larger oil droplet in oils emulsification droplet coarse rear section in the condensate, further separated the profit layering through cone shape material channel or hyperboloid material channel again; Collect product water from lower floor; Larger oil droplet is discharged from the oil extraction outlet with few part water, and wherein said resin is selected from the cross-linked polyacrylamide resin that contains chain alkyl, and molecular formula is (CH
2-CH)
nC0NHCH
2NHR, R are the alkyl that contains 8 to 20 carbon; The trapezoidal side of said cone material channel and the angle of level are 20 ° to 60 °; The ratio of cone channel outlet diameter and tank diameter is 1-4: 10; Said hyperboloid material channel outlet diameter and inlet diameter ratio are 0.2-0.6: 1; With the ratio of passage minimum diameter more than or equal to 1.1, the ratio of the inlet of passage and the vertical height of outlet and passage minimum diameter is 1-5: 1.
Method provided by the invention, condensed water after treatment, in the water outlet of product mouth, the content of oil in water can particularly adopt the better effects if of hyperboloid material channel less than 1ppm, oil content is less than 0.5ppm in its product mouth water outlet.
Description of drawings
Front elevational schematic when Fig. 1 is integrated in the oily water separating equipment for method provided by the invention.Among the figure, 1-water inlet, 2-bottom manhole, 3-lower flange, 4-resin bed downforce table interface; 5-dress resin mouth, 6-resin bed upward pressure table interface, the import of 7-backwash water, 8-product water out, 9-is around the retaining oil dividing plate of a circle; The 10-material channel, 11-top manhole, 12-oil extraction outlet, 13-upper flange, 14,16--liquid level gauge mounting interface; The 15-liquid level gauge, 17-middle part manhole, 18-tank body, 19-resin bed, 20-resin water out.
The specific embodiment
The invention provides a kind of condensed water oil-water separation method; It is characterized in that at first passing through resin bed after the preliminary treatment such as the cooling of oil-containing condensate process, coarse filtration; Come out with the isolated in form of larger oil droplet in oils emulsification droplet coarse rear section in the condensate, further separated the profit layering through cone shape material channel or hyperboloid material channel again; Collect product from lower floor; Larger oil droplet is discharged from the oil extraction outlet with few part water, and wherein said resin is selected from the cross-linked polyacrylamide resin that contains chain alkyl, and molecular formula is (CH
2-CH)
nCONHCH
2NHR, R are the alkyl that contains 8 to 20 carbon; The trapezoidal side of said cone material channel and the angle of level are 20 ° to 60 °; The ratio of cone channel outlet diameter and tank diameter is 1-4: 10; Said hyperboloid material channel outlet diameter and inlet diameter ratio are 0.2-0.6: 1; With the ratio of passage minimum diameter more than or equal to 1.1, the ratio of the vertical height of feeder connection and outlet and passage minimum diameter is 1-5: 1.
In the oil-water separation method of said condensed water, resin has very high hydrophily, and its hydrophily makes the water of the micro oil that contains can diffuse into resin inside rapidly, and oil-containing water is fully contacted with resin; Contain simultaneously oil loving chain alkyl again, the oil in the adsorbed water rapidly, when the oil of absorption gradually the most for a long time, alligatoring forms larger oil droplet, after these larger oil droplets have reached critical size, with resin isolation, floating making progress.Wherein, preferred resin is the cross-linked polyacrylamide resin with chain alkyl, is to be 9.5: 0.5 to 6: 4 acrylamide and N with the part by weight scope; N '-methylene-bisacrylamide, and formation solution soluble in water under the ammonium persulfate existence are suspended in this solution in the oil phase of being made up of chlorobenzene, toluene and Si Ban 80; System is used nitrogen protection; Regulate mixing speed and make the water pearl body in the oil phase mainly be distributed in the 30-80 order, add N, N; N ' N '-tetramethylethylenediamine, reaction at room temperature obtains the cross-linked polyacrylamide resin; The cross-linked polyacrylamide resin is suspended in the ethanol again, adds the alkylamine of metaformaldehyde and 8 to 20 carbon, after reaction under 30-80 ℃, obtain, reaction equation is following:
In method provided by the invention,, through cone shape material channel or hyperboloid material channel profit is further separated again from bottom to top, the profit layering through the condensed water after the resin treatment.
The trapezoidal side of said cone shape material channel and the angle of level are preferably 30 ° to 45 °, and the ratio of cone channel outlet diameter and tank diameter is 1-4: 10; Said hyperboloid material channel outlet diameter and inlet diameter ratio are 0.2-0.6: 1, with the ratio of passage minimum diameter more than or equal to 1.1, the ratio of the vertical height of feeder connection and outlet and passage minimum diameter is 1-5: 1.
Method provided by the invention makes water through resin bed earlier, and oily alligatoring is a larger oil droplet; Up flow type is through circular cone build material channel or hyperbola build material channel again; Utilize profit proportion and the different lock out operation that carry out of throwing ease speed, can be used for the separating technology of the demanding oil-containing water of separating effect, after this method is handled; Can be effectively the condensed water of 200ppm left and right sides oil content be carried out the water-oil separating operation, make in the product water oil content less than 1ppm.Particularly in an embodiment provided by the invention; When loaded resin is the cross-linked polyacrylamide resin of octadecyl; And hyperbola body material channel outlet diameter and inlet diameter ratio are 0.4: 1, with the ratio of passage minimum diameter be 1.2, the vertical height between feeder connection and the outlet and the ratio of passage minimum diameter are under 4: 1 the situation; Can obtain better oil-water separation, oil content is less than 0.5ppm in the product water.
The specific embodiment
Through embodiment the present invention is described further below, but does not therefore limit content of the present invention.
Agents useful for same is the chemical pure product among the embodiment.
Embodiment 1
Present embodiment is integrated in a device with method provided by the invention, explains in conjunction with the running of 1 pair of method of the present invention of accompanying drawing.
In resin bed, used resin is to obtain through following preparation process:
7Kg acrylamide, 3Kg N, N '-methylene-bisacrylamide and 100g ammonium persulfate are dissolved in the 50L water, this solution are suspended in the oil phase of being made up of 160L chlorobenzene, 90L toluene and class of 10Kg department 80; System is used nitrogen protection, regulates mixing speed and makes the water pearl body in the oil phase mainly be distributed in the 30-80 order, adds 0.1L N; N; N ' N '-tetramethylethylenediamine at room temperature reacts 2h, obtains the cross-linked polyacrylamide resin.5Kg cross-linked polyacrylamide resin is suspended in the 100L ethanol, adds 3.3Kg metaformaldehyde and 30Kg18 carbon alkylamine (C
18H
37NH
2), react 12h down at 60 ℃, obtain the cross-linked polyacrylamide resin of octadecyl.
The cross-linked polyacrylamide resin of an amount of octadecyl is installed in the resin bed 19 0.4 meter of bed height through resin mouth 5.Water inlet 1 from lower flange 3 after the preliminary treatment such as oil-containing condensate (oil-containing is about 200ppm) process cools to about 95 ℃, coarse filtration gets into tank body 18; Evenly slowly rise and arrive resin bed 19; The resin bed floor height is 0.4 meter; The oil-containing condensate is passed through resin bed with 10 meters/hour speed, and institute's time-consuming is 144 seconds.Oil in the condensate is collected on the resin through breakdown of emulsion, enrichment in resin bed 19, and the oil of enrichment comes out with the isolated in form of larger oil droplet then, becomes big through the oil droplet alligatoring in the condensate after the resin bed; Slowly rise 1.6 meters with water; In the uphill process larger oil droplet can also continue sticking with, through vertical lifting 576 seconds, profit arrived cone material channel 10; The angle of cone shape material channel trapezoidal hypotenuse and level is 30 °, and the ratio of channel outlet diameter and tank diameter is 1: 5.Because the sectional area of uphill process diminishes, oil droplet continues enrichment and and separated form water in material channel.After 244 seconds, leave material channel; What oil droplet became in the water is bigger, and the profit that slowly rises is because the layering of gravity profit has begun obviously, and larger oil droplet is with continuing to rise to the tank top; The oil reservoir that accumulates in the top is discharged recovery by the oil extraction outlet 12 of top upper flange 13; Because the density of water is big, arrive the 8 discharge recovery of product water out thereby can down flow through the passage lateral wall, accomplish water-oil separating thus.
The water outlet of monitoring product mouth is measured through ultraviolet spectrophotometry (GB 12153-89), and oil content is less than 1ppm in the product mouth water outlet water.
Certainly; Because this method is to be integrated in the tank body to implement; Therefore, the downforce table interface 4 of bottom manhole 2, top manhole 11, middle part manhole 17, resin bed, upward pressure table interface 6, dress resin mouth 5, backwash water import 7, liquid level gauge mounting interface 14,16, liquid level gauge 15, resin water out 20 etc. all are the needs of conventional operation operation or maintenance and being provided with.For example, in this running, resin bed can also be filtered suspension etc., and trapped substance resin filtering layer front and back pressure reduction along with the time can increase, and when pressure reduction reaches 0.1Mpa, just need carry out backwash to recover strainability to equipment.Utilize former water from backwash water import 7 water inlets, from 20 drainings of resin water out, trapped substance is gone out, this device put into operation again after backwash was accomplished.This method can also be provided with the retaining oil dividing plate 9 around a circle in order further to reduce the back-mixing of profit above the product water out.
Condition is identical with embodiment 1; Difference is circular cone build material channel is wherein changed into hyperbola bodily form material channel: the outlet diameter of hyperbola bodily form material channel and the ratio of inlet diameter are 0.4: 1; With the ratio of passage minimum diameter be 1.2, the ratio of the inlet of said hyperboloid material channel and the vertical height of outlet and passage minimum diameter was at 4: 1.
Water outlet is monitored for the product mouth, and oil content explains that less than 0.5ppm the oil-water separation of the separator that is provided with the hyperboloid dividing plate is better in the water.
Claims (5)
1. oil-water separation method; It is characterized in that after the preliminary treatment of oil-containing condensate through cooling, coarse filtration; At first pass through resin bed, come out with the isolated in form of larger oil droplet in the oils emulsification droplet coarse rear section in the condensate, further separated through cone shape material channel or hyperboloid material channel from bottom to top again; The profit layering; Collect product water from lower floor, larger oil droplet is discharged from the oil extraction outlet with few part water, and the trapezoidal side of said cone material channel and the angle of level are 20 ° to 60 °; The ratio of cone channel outlet diameter and tank diameter is 1-4: 10; Said hyperboloid material channel outlet diameter and inlet diameter ratio are 0.2-0.6: 1, with the ratio of passage minimum diameter more than or equal to 1.1, the ratio of the vertical height of the entrance and exit of passage and passage minimum diameter is 1-5: 1.
2. according to the process of claim 1 wherein that said resin is selected from the cross-linked polyacrylamide resin that contains chain alkyl, molecular formula is (CH
2-CH)
nCONHCH
2NHR, R are the alkyl that contains 8 to 20 carbon.
3. according to the method for claim 2, wherein said R is the alkyl of 16 to 18 carbon.
4. according to the method for claim 1, the angle of said cone shape material channel is at 30 ° to 60 °.
5. according to the method for claim 2, the said cross-linked polyacrylamide resin that contains chain alkyl is to be 9.5: 0.5 to 6: 4 acrylamide and N with the part by weight scope; N '-methylene-bisacrylamide, and formation solution soluble in water under the ammonium persulfate existence are suspended in this solution in the oil phase of being made up of chlorobenzene, toluene and Si Ban 80; System is used nitrogen protection; Regulate mixing speed and make the water pearl body in the oil phase mainly be distributed in the 30-80 order, add N, N; N ' N '-tetramethylethylenediamine, reaction at room temperature obtains the cross-linked polyacrylamide resin; Again the cross-linked polyacrylamide resin is suspended in the ethanol, adds the alkylamine of metaformaldehyde and 8 to 20 carbon, after reaction under 30-80 ℃, obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910078236A CN101810942B (en) | 2009-02-23 | 2009-02-23 | Oil-water separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910078236A CN101810942B (en) | 2009-02-23 | 2009-02-23 | Oil-water separation method |
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| Publication Number | Publication Date |
|---|---|
| CN101810942A CN101810942A (en) | 2010-08-25 |
| CN101810942B true CN101810942B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910078236A Expired - Fee Related CN101810942B (en) | 2009-02-23 | 2009-02-23 | Oil-water separation method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2875546Y (en) * | 2006-03-06 | 2007-03-07 | 杨亚设 | Oil water separating device |
| CN101104119A (en) * | 2007-07-23 | 2008-01-16 | 鞍钢股份有限公司 | Oil-water automatic separating device and its separating method |
-
2009
- 2009-02-23 CN CN200910078236A patent/CN101810942B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2875546Y (en) * | 2006-03-06 | 2007-03-07 | 杨亚设 | Oil water separating device |
| CN101104119A (en) * | 2007-07-23 | 2008-01-16 | 鞍钢股份有限公司 | Oil-water automatic separating device and its separating method |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2002-370005A 2002.12.24 |
| JP特开2004-337791A 2004.12.02 |
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Address after: 100083 box 20, 911 Xueyuan Road, Beijing, Haidian District (North Church Building) Patentee after: Central Research Institute of China Chemical Science and Technology Address before: 100011 Beijing city Chaoyang District Anwai outside the street Anwar 5 District No. 18 room 506 Patentee before: Central Research Institute of China Chemical Science and Technology |
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Granted publication date: 20120905 Termination date: 20160223 |
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