CN102491556A - Coal liquefaction cyanide-containing sewage treatment system and treatment method - Google Patents
Coal liquefaction cyanide-containing sewage treatment system and treatment method Download PDFInfo
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- CN102491556A CN102491556A CN2011103980027A CN201110398002A CN102491556A CN 102491556 A CN102491556 A CN 102491556A CN 2011103980027 A CN2011103980027 A CN 2011103980027A CN 201110398002 A CN201110398002 A CN 201110398002A CN 102491556 A CN102491556 A CN 102491556A
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Abstract
The invention relates to a coal liquefaction cyanide-containing sewage treatment system which comprises a homogeneous tank, a reaction and settlement device, a dissolved air floatation device, a microfiltration device and a reverse osmosis device which are connected with one another in sequence. The invention also relates to a coal liquefaction cyanide-containing sewage treatment method. The invention has the beneficial effects that after being treated by the coal liquefaction cyanide-containing sewage treatment system and treatment method, coal liquefaction cyanide-containing sewage can be used in a circulating water system; and meanwhile, the difficult problem that the cyanide-containing sewage has no corresponding treatment process is solved.
Description
Technical field
The present invention relates to a kind of Sewage treatment systems and treatment process.Particularly, the present invention relates to a kind of gelatin liquefaction cyanogens-containing sewage water treatment system and treatment process.
Background technology
Erdos coal system oil content company of group of Shenhua has the production unit of the first cover large industrialized coal direct liquefaction production oil product in the world.Direct coal liquefaction technology worldwide received much concern in recent years.To the cyanogens-containing sewage water of the DCL/Direct coal liquefaction equipment exhausting of coal liquefaction plant, existing design adopts reverse osmosis process to handle, and the structure iron of this treatment system is as shown in Figure 1.Fig. 1 is the structure iron of existing gelatin liquefaction cyanogens-containing sewage water treatment system, comprising the even matter jar, dissolved air flotation device, micro-filtration and the reverse osmosis unit that link to each other successively.But because the water quality of cyanogens-containing sewage water surpasses the water inlet index of r-o-, as: the concentration of cyanogen root has surpassed value 1mg/L at 2-10mg/L; Ammonia nitrogen concentration 20-100mg/L, and value is 0, so cyanogens-containing sewage water can't be handled with reverse osmosis process.
Therefore, still need improve existing gelatin liquefaction cyanogens-containing sewage water treatment system and treatment process.
Summary of the invention
An object of the present invention is to provide a kind of gelatin liquefaction cyanogens-containing sewage water treatment system.
Another object of the present invention provides a kind of gelatin liquefaction cyanogens-containing sewage water treatment process.
Gelatin liquefaction cyanogens-containing sewage water treatment system provided by the invention, it comprises even matter jar, reaction precipitation device, dissolved air flotation device, micro-filtration and the reverse osmosis unit that links to each other successively.
Said reaction precipitation device comprises medicament retort, polymer reaction jar and the settling tank that links to each other successively.Medicament in the said medicament retort is sal epsom, sodium hydroxide and iron trichloride.Polymkeric substance in the said polymer reaction jar is a Poly aluminum Chloride (PAC).
Said dissolved air flotation device comprises air-dissolving air-float jar and the souring tank that links to each other successively.Acid in the said souring tank is sulfuric acid.
Said micro-filtration comprises strainer and the micro-strainer that links to each other successively.The aperture of said strainer is 400 orders.Said micro-strainer has hollow-fibre membrane, and the molecular weight cut-off of said hollow-fibre membrane is 500.
Said reverse osmosis unit comprises dechlorination device, apparatus for eliminating sludge, strainer and the reverse osmosis membrane that links to each other successively.Antichlor in the said dechlorination device is a sodium sulfite anhy 96.Scale remover in the said apparatus for eliminating sludge is a sulfuric acid.The aperture of said strainer is 5 μ m.The molecular weight cut-off of said reverse osmosis membrane is 100.
Gelatin liquefaction cyanogens-containing sewage water treatment process provided by the invention, it may further comprise the steps:
(1), water quality, the water yield are stablized with the even matter of gelatin liquefaction cyanogens-containing sewage water;
(2) add medicament in the water after above-mentioned even matter and make abundant reaction, add polymkeric substance then and handle, the sewage that polymer treatment is crossed imports in the settling tank and precipitates;
(3) with handling in the above-mentioned oettIed sewage importing air-dissolving air-float jar, carry out acidifying with sulfuric acid then;
(4) sewage after the above-mentioned acidifying is filtered with strainer, filter with micro-strainer then;
(5) with the dechlorination of the filtrating behind the above-mentioned micro-filtration, scale removal is filtered with strainer then, and filtrating is handled with reverse osmosis membrane.
Wherein, in the step (2), said medicament is sal epsom, sodium hydroxide and iron trichloride; Said polymkeric substance is a Poly aluminum Chloride (PAC).
The gelatin liquefaction cyanogens-containing sewage water through gelatin liquefaction cyanogens-containing sewage water treatment system of the present invention and treatment process after, can be back to circulating water system, solved the difficult problem that cyanide wastewater does not have corresponding treatment process simultaneously.
Description of drawings
Fig. 1 is the structure iron of existing gelatin liquefaction cyanogens-containing sewage water treatment system.
Fig. 2 is the structure iron of gelatin liquefaction cyanogens-containing sewage water treatment system of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is carried out more detailed description.
Fig. 2 is the structure iron of gelatin liquefaction cyanogens-containing sewage water treatment system of the present invention.As shown in Figure 2, gelatin liquefaction cyanogens-containing sewage water treatment system provided by the invention, it comprises even matter jar, reaction precipitation device, dissolved air flotation device, micro-filtration and the reverse osmosis unit that links to each other successively.
Said even matter jar plays buffering, regulates water quality, thereby water quality, water inlet that the water yield is stable is provided for follow-up device.Said even matter jar can be with the cyanogens-containing sewage water that produces from different device in the gelatin liquefaction equipment (for example; Circulating water cooling tower sewer, condensed water treatment station neutralization tank waste water and through the coal hydrogen manufacturing cyanide wastewater of oxide treatment) carry out the thorough mixing homogenizing, for follow up device provides the stable water quality and the water yield.Said even matter jar can use the even matter jar of any prior art, makes water quality, purpose that the water yield is stable as long as it can reach.
Said reaction precipitation device comprises medicament retort, polymer reaction jar and the settling tank that links to each other successively.Medicament in the said medicament retort is sal epsom, sodium hydroxide and iron trichloride.Sal epsom is in order to let mg ion in higher pH settle.The precipitation process of mg ion will cause the reduction of silica concentration, and this is that (claim chrystile, chrystile again, molecular formula is 3MgO2SiO because they can generate hydrated magnesium silicate
22H
2O).Sodium hydroxide is for the pH regulator with sewage is 11, thereby the deposition of mg ion can be taken place; Simultaneously bicarbonate ion is converted into carbanion, the generation ZG 301 that reacts of carbanion and calcium ion.Iron trichloride helps the flocculation of particulate in the sewage, thereby in subsequent disposal, is easier to remove.Polymkeric substance in the said polymer reaction jar is a Poly aluminum Chloride (PAC).Said polymkeric substance can be convenient in follow-up settling tank, precipitate so that the particle in the sewage becomes big.Said settling tank precipitates (for example, through leaving standstill) to sewage to be handled, and can remove in the decontaminated water thus and be retained in the scum silica frost at settling tank top and the mud of bottom.
Said dissolved air flotation device comprises air-dissolving air-float jar and the souring tank that links to each other successively.Said air-dissolving air-float jar is removals such as the suspended solids in the sewage of autoreaction settler, oil slick in the future, make suspended solids in the sewage less than 2mg/L, and turbidity is less than 2 NTU.Can use any dissolved air flotation device known in the art, arrive desired content as long as it can reach suspended solids, the oil slick removed in the sewage.Acid in the said souring tank is sulfuric acid.Sulfuric acid can drop to (9.6-9.9) below 10 from 11 with the pH of sewage, the caustic embrittlement phenomenon can not take place to protect the hollow-fibre membrane in the follow-up micro-filtration.
Said micro-filtration comprises strainer and the micro-strainer that links to each other successively.Said micro-filtration can be with removing from the suspended substance in the dissolved air flotation device water outlet, bacterium, capsule and particulate.The aperture of said strainer is 400 orders, to remove some suspended solidss.Said micro-strainer has hollow-fibre membrane, and the molecular weight cut-off of said hollow-fibre membrane is 500.The characteristic of said micro-strainer is that working pressure is low high with the water recovery, and the water recovery of said micro-strainer generally is 90-98%.
Said reverse osmosis unit comprises dechlorination device, apparatus for eliminating sludge, strainer and the reverse osmosis membrane that links to each other successively.Said reverse osmosis unit is further handled the sewage from said micro-filtration, can remove most of dissolved solids particle.Antichlor in the said dechlorination device is a sodium sulfite anhy 96.The removal chlorine residue is extremely important, because the employed synthetic reverse osmosis membrane of reverse osmosis unit is very responsive to cl ions, is easy to receive the oxidation decomposition of cl ions.Scale remover in the said apparatus for eliminating sludge is a sulfuric acid.It is about 6.5 that sulfuric acid can make the pH of sewage, produces scale formation to avoid reverse osmosis membrane, prevents the fouling of silicon-dioxide simultaneously.The aperture of said strainer is 5 μ m, to remove some impurity.The molecular weight cut-off of said reverse osmosis membrane is 100, thereby can remove most of dissolved solids particle.
Gelatin liquefaction cyanogens-containing sewage water treatment process provided by the invention may further comprise the steps:
(1), water quality, the water yield are stablized with the even matter of gelatin liquefaction cyanogens-containing sewage water;
(2) add medicament in the water after above-mentioned even matter and make abundant reaction, add polymkeric substance then and handle, the sewage that polymer treatment is crossed imports in the settling tank and precipitates;
(3) with handling in the above-mentioned oettIed sewage importing air-dissolving air-float jar, carry out acidifying with sulfuric acid then;
(4) sewage after the above-mentioned acidifying is filtered with strainer, filter with micro-strainer then;
(5) with the dechlorination of the filtrating behind the above-mentioned micro-filtration, scale removal is filtered with strainer then, and filtrating is handled with reverse osmosis membrane.
Wherein, in the step (2), said medicament is sal epsom, sodium hydroxide and iron trichloride; Said polymkeric substance is a Poly aluminum Chloride (PAC).
Particularly, gelatin liquefaction cyanogens-containing sewage water treatment process provided by the invention may further comprise the steps:
(1) with gelatin liquefaction cyanogens-containing sewage water even matter in even matter jar, makes water conditioning; The even matter time is 1～3 hour, and temperature is 20 ℃～25 ℃;
(2) add 10～15g/m in the water after above-mentioned even matter
3Sal epsom, the 0.2～0.3g/m of amount
3The sodium hydroxide and the 0.1～0.15g/m of amount
3It is 11 also fully reactions that the iron trichloride of amount makes the pH of sewage, adds 0.1～0.2g/m then
3The Poly aluminum Chloride (PAC) of amount is handled, and leaves standstill in the sewage importing settling tank that Poly aluminum Chloride (PAC) was handled and precipitates in 3～4 hours;
(3) with handling in the above-mentioned oettIed sewage importing air-dissolving air-float jar, carry out acidifying with sulfuric acid then, make the pH of sewage drop to 9.6-9.9;
(4) sewage after the above-mentioned acidifying being used the aperture is that 400 purpose strainers filter, then filtrating use to have molecular weight cut-off be that the micro-strainer of 500 hollow-fibre membrane filters;
(5) add 0.2～0.3g/m in the filtrating behind above-mentioned micro-filtration
3The sodium sulfite anhy 96 dechlorination of amount is added the pH that sulfuric acid makes sewage then and is dropped to 6.5 left and right sides scale removal, and it is that the strainer of 5 μ m filters that the sewage after the scale removal uses the aperture, and it is 100 reverse osmosis membrane processing that filtrating is used molecular weight cut-off.
Wherein, in the step (3), specifically can handle the sewage that the pH value is 11 the about 1000mg/L of suspended solids content, these suspended solidss separated through air-dissolving air-float for: said air-dissolving air-float jar.The part of the sewage behind the air-dissolving air-float can be pressurized to 0.6MPa by reflux pump, is recycled to the pressure air-dissolving air-float jar, and air injects the air-dissolving air-float jar to pressurized air, makes that in the air-dissolving air-float jar air content in the water is a hypersaturated state.When the water that contains excess air is injected in the feed water; Air just is tiny bubble and in air supporting, discharges; In dispose procedure, adhere to the suspended solids in the sewage and it is climbed up on top of the water, after scum silica frost on the water surface scrapes the scum silica frost jar through slag scraper, be discharged to biochemical part greasy filth scum silica frost pond of wastewater treatment field or mud concentration tank with pump.Some solid heavier than water will be deposited in the bottom of dissolved air flotation device.Bottom greasy filth through mud scraper scrape the air flotation pool center after pump delivery to the sewage-farm in the biochemical part greasy filth scum silica frost pond.
Wherein, in the step (4), specifically can for: this process can be designed as a plurality of (for example two) series, and each Series Design processing power is 106.5m
3/ h.Come water earlier through strainer, to remove some bigger suspended solidss.Wherein, the backwash of this strainer is to be controlled by differential pressure to realize automatic backwash, uses the surface of a spot of filtered water backwash strainer.The strainer water outlet gets into micro-strainer, and micro-strainer uses hollow-fibre membrane make a return journey suspended substance, bacterium, capsule and particulate in dewatering.The characteristic of micro-strainer is that working pressure is low high with the water recovery, and the water recovery of micro-strainer generally is 90-98%.
Wherein, in the step (5), specifically can for: come water to be delivered to many (security personnel) strainers through fresh feed pump, the aperture of this strainer (for example, the mesh of cartridge type filter screen) is 5 μ m.For this reason, the redox potential appearance is set security personnel behind the strainer, control water oxygen reduction potential is less than+180mV.At said filter outlet conductivity meter is installed and is kept watch on the into water quality of reverse osmosis membrane.The water outlet of security personnel's strainer is transported to reverse osmosis membrane through HPP (this pump is a variable frequency pump) and handles, series that reverse osmosis membrane can be divided into a plurality of (for example two), and each Series Design processing power is 106.5m
3/ h.Most of dissolved solids particle is removed by reverse osmosis membrane.The penetrating fluid that reverse osmosis membrane produces is approximately 157m
3/ h can be used as boiler water feeding.The generation liquid concentrator is 55m
3/ h, getting into the dope jar can mix with the power station brine waste.The recovery of water reaches 75% in the reverse osmosis membrane.
The invention is further illustrated by the following examples, and these embodiment do not provide constraints to the present invention.
The used gelatin liquefaction cyanogens-containing sewage water cyanide wastewater after the oxide treatment of hanging oneself.It is formed as follows:
The manufacturer of main device and model
Embodiment 1
With above-mentioned gelatin liquefaction cyanogens-containing sewage water even matter in even matter jar, make water conditioning; The even matter time is 3 hours, and temperature is 25 ℃.Water in the above-mentioned even matter jar is imported in the medicament retort, add 10g/m
3Sal epsom, the 0.2g/m of amount
3The sodium hydroxide and the 0.1g/m of amount
3It is 11 also abundant reactions 2 hours that the iron trichloride of amount makes the pH of sewage, then the sewage in the medicament retort is imported in the polymer reaction jar, adds 0.1g/m
3The Poly aluminum Chloride (PAC) of amount was handled 1 hour, and the sewage of then Poly aluminum Chloride (PAC) being handled imports to leave standstill in the settling tank and precipitated in 4 hours; With handling 1 hour in the above-mentioned oettIed sewage importing air-dissolving air-float jar, import to then in the souring tank and carry out acidifying with sulfuric acid, make the pH of sewage drop to 9.6; It is that 400 purpose strainers filter that sewage after the above-mentioned acidifying is used the aperture, then filtrating use to have molecular weight cut-off be that the micro-strainer of 500 hollow-fibre membrane filters; With adding 0.2g/m in the importing of the filtrating behind the above-mentioned micro-filtration dechlorination device
3The sodium sulfite anhy 96 dechlorination of amount imports then and adds sulfuric acid in the apparatus for eliminating sludge and make the pH of sewage drop to 6.5 left and right sides scale removal, and it is that the strainer of 5 μ m filters that the sewage after the scale removal is used the aperture, and it is 100 reverse osmosis membrane processing that filtrating is used molecular weight cut-off, promptly gets product water.The composition of said product water is following, and it has reached the standard of reuse fully.
| Project | Product water (mg/L) |
| Ca 2+ | 0.7 |
| Mg 2+ | 0.1 |
| Na + | 26 |
| K + | 0.2 |
| SO 4 2- | 13 |
| Cl - | 31 |
| HCO 3 - | 0.8 |
| SiO 2 | 1.2 |
| TDS (total dissolved solidss) | 73 |
| pH | 5.2 |
Embodiment 2
With above-mentioned gelatin liquefaction cyanogens-containing sewage water even matter in even matter jar, make water conditioning; The even matter time is 1 hour, and temperature is 20 ℃.Water in the above-mentioned even matter jar is imported in the medicament retort, add 15g/m
3Sal epsom, the 0.3g/m of amount
3The sodium hydroxide and the 0.15g/m of amount
3It is 11 also abundant reactions 2 hours that the iron trichloride of amount makes the pH of sewage, then the sewage in the medicament retort is imported in the polymer reaction jar, adds 0.2g/m
3The Poly aluminum Chloride (PAC) of amount was handled 1 hour, and the sewage of then Poly aluminum Chloride (PAC) being handled imports to leave standstill in the settling tank and precipitated in 3 hours; With handling 1 hour in the above-mentioned oettIed sewage importing air-dissolving air-float jar, import to then in the souring tank and carry out acidifying with sulfuric acid, make the pH of sewage drop to 9.9; It is that 400 purpose strainers filter that sewage after the above-mentioned acidifying is used the aperture, then filtrating use to have molecular weight cut-off be that the micro-strainer of 500 hollow-fibre membrane filters; With adding 0.3g/m in the importing of the filtrating behind the above-mentioned micro-filtration dechlorination device
3The sodium sulfite anhy 96 dechlorination of amount imports then and adds sulfuric acid in the apparatus for eliminating sludge and make the pH of sewage drop to 6.5 left and right sides scale removal, and it is the strainer of 5 μ m that the sewage after the scale removal is used the aperture, and it is 100 reverse osmosis membrane processing that filtrating is used molecular weight cut-off, promptly gets product water.The composition of said product water has reached the standard of reuse fully.
Embodiment 3
With above-mentioned gelatin liquefaction cyanogens-containing sewage water even matter in even matter jar, make water conditioning; The even matter time is 2 hours, and temperature is 23 ℃.Water in the above-mentioned even matter jar is imported in the medicament retort, add 13g/m
3Sal epsom, the 0.25g/m of amount
3The sodium hydroxide and the 0.13g/m of amount
3It is 11 also abundant reactions 2 hours that the iron trichloride of amount makes the pH of sewage, then the sewage in the medicament retort is imported in the polymer reaction jar, adds 0.15g/m
3The Poly aluminum Chloride (PAC) of amount was handled 1 hour, and the sewage of then Poly aluminum Chloride (PAC) being handled imports to leave standstill in the settling tank and precipitated in 3.5 hours; With handling 1 hour in the above-mentioned oettIed sewage importing air-dissolving air-float jar, import to then in the souring tank and carry out acidifying with sulfuric acid, make the pH of sewage drop to 9.9; It is that 400 purpose strainers filter that sewage after the above-mentioned acidifying is used the aperture, then filtrating use to have molecular weight cut-off be that the micro-strainer of 500 hollow-fibre membrane filters; With adding 0.25g/m in the importing of the filtrating behind the above-mentioned micro-filtration dechlorination device
3The sodium sulfite anhy 96 dechlorination of amount imports then and adds sulfuric acid in the apparatus for eliminating sludge and make the pH of sewage drop to 6.5 left and right sides scale removal, and it is the strainer of 5 μ m that the sewage after the scale removal is used the aperture, and it is 100 reverse osmosis membrane processing that filtrating is used molecular weight cut-off, promptly gets product water.The composition of said product water has reached the standard of reuse fully.
It will be understood by those skilled in the art that under the instruction of this specification sheets, can make some modifications or variation the present invention.These modifications and change also should be within claim of the present invention institute restricted portion.
Claims (8)
1. gelatin liquefaction cyanogens-containing sewage water treatment system, it comprises even matter jar, reaction precipitation device, dissolved air flotation device, micro-filtration and the reverse osmosis unit that links to each other successively.
2. gelatin liquefaction cyanogens-containing sewage water treatment system according to claim 1 is characterized in that, said reaction precipitation device comprises medicament retort, polymer reaction jar and the settling tank that links to each other successively.
3. gelatin liquefaction cyanogens-containing sewage water treatment system according to claim 2 is characterized in that the medicament in the said medicament retort is sal epsom, sodium hydroxide and iron trichloride; Polymkeric substance in the said polymer reaction jar is a Poly aluminum Chloride (PAC).
4. according to claim 2 or 3 described gelatin liquefaction cyanogens-containing sewage water treatment systems, it is characterized in that said dissolved air flotation device comprises air-dissolving air-float jar and the souring tank that links to each other successively; Said micro-filtration comprises strainer and the micro-strainer that links to each other successively; Said reverse osmosis unit comprises dechlorination device, apparatus for eliminating sludge, strainer and the reverse osmosis membrane that links to each other successively.
5. gelatin liquefaction cyanogens-containing sewage water treatment system according to claim 4 is characterized in that the acid in the said souring tank is sulfuric acid; The aperture of the said strainer in the said micro-filtration is 400 orders; Said micro-strainer has hollow-fibre membrane, and the molecular weight cut-off of said hollow-fibre membrane is 500; Antichlor in the said dechlorination device is a sodium sulfite anhy 96; Scale remover in the said apparatus for eliminating sludge is a sulfuric acid; The aperture of the said strainer in the said reverse osmosis unit is 5 μ m; The molecular weight cut-off of said reverse osmosis membrane is 100.
6. gelatin liquefaction cyanogens-containing sewage water treatment process, it may further comprise the steps:
(1), water quality, the water yield are stablized with the even matter of gelatin liquefaction cyanogens-containing sewage water;
(2) add medicament in the water after above-mentioned even matter and make abundant reaction, add polymkeric substance then and handle, the sewage that polymer treatment is crossed imports in the settling tank and precipitates;
(3) with handling in the above-mentioned oettIed sewage importing air-dissolving air-float jar, carry out acidifying with sulfuric acid then;
(4) sewage after the above-mentioned acidifying is filtered with strainer, filter with micro-strainer then;
(5) with the dechlorination of the filtrating behind the above-mentioned micro-filtration, scale removal is filtered with strainer then, and filtrating is handled with reverse osmosis membrane.
7. gelatin liquefaction cyanogens-containing sewage water treatment process according to claim 6 is characterized in that, in the step (2), said medicament is sal epsom, sodium hydroxide and iron trichloride; Said polymkeric substance is a Poly aluminum Chloride (PAC).
8. according to claim 6 or 7 described gelatin liquefaction cyanogens-containing sewage water treatment processs, it is characterized in that, be specially:
(1) with gelatin liquefaction cyanogens-containing sewage water even matter in even matter jar, makes water conditioning; The even matter time is 1～3 hour, and temperature is 20 ℃～25 ℃;
(2) add 10～15g/m in the water after above-mentioned even matter
3Sal epsom, the 0.2～0.3g/m of amount
3The sodium hydroxide and the 0.1～0.15g/m of amount
3It is 11 also fully reactions that the iron trichloride of amount makes the pH of sewage, adds 0.1～0.2g/m then
3The Poly aluminum Chloride (PAC) of amount is handled, and leaves standstill in the sewage importing settling tank that Poly aluminum Chloride (PAC) was handled and precipitates in 3～4 hours;
(3) with handling in the above-mentioned oettIed sewage importing air-dissolving air-float jar, carry out acidifying with sulfuric acid then, make the pH of sewage drop to 9.6-9.9;
(4) sewage after the above-mentioned acidifying being used the aperture is that 400 purpose strainers filter, then filtrating use to have molecular weight cut-off be that the micro-strainer of 500 hollow-fibre membrane filters;
(5) add 0.2～0.3g/m in the filtrating behind above-mentioned micro-filtration
3The sodium sulfite anhy 96 dechlorination of amount is added the pH that sulfuric acid makes sewage then and is dropped to 6.5 left and right sides scale removal, and it is that the strainer of 5 μ m filters that the sewage after the scale removal uses the aperture, and it is 100 reverse osmosis membrane processing that filtrating is used molecular weight cut-off.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007088A (en) * | 2016-07-07 | 2016-10-12 | 曹蕊 | Method for treating sewage containing impurities |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673128A (en) * | 2005-03-15 | 2005-09-28 | 嘉应学院 | Domestic sewage deeply treating process |
| CN1693239A (en) * | 2005-04-14 | 2005-11-09 | 哈尔滨工业大学 | Tech. process for reducing mineralization of extracting oil sewage |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673128A (en) * | 2005-03-15 | 2005-09-28 | 嘉应学院 | Domestic sewage deeply treating process |
| CN1693239A (en) * | 2005-04-14 | 2005-11-09 | 哈尔滨工业大学 | Tech. process for reducing mineralization of extracting oil sewage |
Non-Patent Citations (1)
| Title |
|---|
| 魏江波 等: "煤制油含盐废水处理回用工程设计与运行", 《工业用水与废水》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007088A (en) * | 2016-07-07 | 2016-10-12 | 曹蕊 | Method for treating sewage containing impurities |
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