CN1778696A - Treatment of oil-bearing waste water - Google Patents
Treatment of oil-bearing waste water Download PDFInfo
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- CN1778696A CN1778696A CN 200410073293 CN200410073293A CN1778696A CN 1778696 A CN1778696 A CN 1778696A CN 200410073293 CN200410073293 CN 200410073293 CN 200410073293 A CN200410073293 A CN 200410073293A CN 1778696 A CN1778696 A CN 1778696A
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Abstract
An oily waste water treatment is carried out by crude filtering for passing oily waste water through into water-collecting pool by grid, oil-water separating for delivering oily waste water to oil-water separator, air float treating for entering the discharged water into pressurized dissolved air float pool, secondary oil-water separating and flowing the discharged water into reservoir. The system consists of water-collecting pool with grid at inlet, oil-water separator, pressurized dissolved air float pool and reservoir.
Description
Affiliated technical field:
The present invention relates to technical field of sewage, be specifically related to a kind of treatment process of oily(waste)water.
Background technology:
No matter be at industrial circle, still in daily life, it is oily(waste)water that sizable ratio is arranged in the sewage that is discharged.If oily(waste)water is unprocessed and directly discharge, can cause quite serious pollution to water surrounding so on the one hand, and on the other hand, because China has sizable zone all to be in the water resources shortage state, water price is ceaselessly going up, a large amount of oily(waste)water directly discharging is waste to water resources, therefore how oily(waste)water is handled and reuse has crucial realistic meaning to control water environment pollution and conserve water resource.Because the oily(waste)water source is wider, at present seen correlation technique report is the technology of handling for the big waste water of oleaginousness mostly, the technology that oil field waste is handled for example, for the few waste water of oleaginousness, for example the technology handled of power plant's oily(waste)water is not also seen.And the also water-and-oil separators that adopt of the technology that the bigger waste water of oleaginousness is handled carry out just directly discharging after the oily water separation more, are difficult to reach the standard of discharge of wastewater and reuse.Therefore at present the problem that exists of prior art is, can not effectively handle and causes pollution and waste to water resources oily(waste)water.
Summary of the invention:
The object of the present invention is to provide a kind of treatment process of oily(waste)water, with can not effectively handling of overcoming that prior art exists and cause pollution and waste problem to water resources to oily(waste)water.
For overcoming the deficiency that prior art exists, the present invention is design like this, and a kind of treatment process of oily(waste)water comprises the steps successively, and A, coarse filtration: oily(waste)water enters water collecting basin by grid; B, an oily water separation: the oily(waste)water in the water collecting basin is sent into oily-water seperating equipment, and sewage carries out preliminary oily water separation; C, air supporting are handled: the water outlet of oily-water seperating equipment enters the pressurized dissolved air flotation pond; D, secondary oil water sepn: the water outlet of air flotation pool is sent into oily-water seperating equipment and is carried out oily water separation; E, the water outlet of secondary oil water sepn enter tank.
Such scheme also comprises F, filters and sterilisation step once more: the water in the tank is filtered once more, the suspension content in the water outlet is reached≤5mg/L; Filter water outlet and enter clean water basin, squeeze into the reuse water pipe network system at last through after disinfecting.
Such scheme also comprises G, waste oil recycling step: the waste oil that two sections oily-water seperating equipments in B, the D step are discharged is pooled to behind the waste oil pool with being pumped into oily-water seperating equipment, carry out the waste oil reuse after the oily water separation, the effluent recycling of oleaginousness＜10mg/L is to step B.
Can increase the coagulating sedimentation step H of a suspended substance between A and the B: add concentration and be 10～20% aluminium chlorohydroxide coagulating agent before an oily water separation, the throwing amount is 10～25mg/L.Owing to also may comprise a small amount of rainwater and ground wash-down water in the oily(waste)water, will carry more silt secretly like this, increase this step and can make silt in water collecting basin or oily-water seperating equipment, deposit separation.
Among the step C, water outlet is 15～40min in the air flotation pool residence time, and available depth is 1.0～2.0m, and surface load is 2.0～5.0m
3/ m
2H.
The employed system of a kind of treatment process of oily(waste)water: comprise that successively ingress is provided with the water collecting basin of grid, oily-water seperating equipment, pressurized dissolved air flotation pond, oily-water seperating equipment and tank.
Above-mentioned two oily-water seperating equipments are parallel flow intercepters; Described pressurized dissolved air flotation pond is made up of pressure air-dissolving system, molten gas release system and dissolved air flotation system.By 10～30% reflux ratios clear water is squeezed into dissolving from clean water basin with pressure pump during work, simultaneously squeezing into pressurized air in the dissolving makes it become pressure air-dissolving water, and finish energy dissipating, decompression process in the air flotation pool exposure chamber by dissolved air release by pipeline, making it dissolve in gas discharges with the form of microvesicle, and equably with sewage in elaioleucite adsorb mutually, form little oil group.
Also comprise the filtration unit that is connected with tank.
Above-mentioned filtration unit is a pressure filter, strainer water inlet SS≤20mg/L, and water outlet SS≤5mg/L, operating pressure≤0.4MPa, working temperature is 5～50 ℃.
Above-mentioned parallel flow intercepter all is connected with waste oil pool, and described waste oil pool is connected with the waste oil reuse tank through oily-water seperating equipment.
Compared with prior art, advantage of the present invention is:
1. applied widely: this technology and system compared with prior art also can improve separation efficiency not only applicable to highly concentrated oil-bearing wastewater; This technology more can be handled the low waste water of oleaginousness, for example handles at power plant effluent.With the power plant effluent is example, the power plant effluent flow is bigger, oil concentration is lower but be higher than emission standard, deal with and never have solution route well, the air supporting treatment step that is adopted among the present invention can adsorb elaioleucite in the sewage and microvesicle the little oil of formation group effectively mutually, be convenient to the carrying out of next oily water separation step, promote its separating effect once more.
2. simple, the enforcement easily of technology: unit involved in the technology all adopts the conventional process unit, utilizes the processing unit of technology maturation, and reliability is secure on the one hand, is easy on the other hand transform on the basis of original treatment facility.
3. can effectively reduce pollution and waste to water resources: the You Heshui after the processing can reach reuse standard and recycle, basically can realize the zero release of oily(waste)water, a large amount of water, oily resource have been saved, even water does not carry out reuse and directly discharging in handled, also can reach the emission standard of national defined, can not pollute water resources.
Description of drawings:
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Below will as embodiment the present invention be described with the treatment process of power plant's oily(waste)water and supporting system.
Referring to accompanying drawing, a kind of treatment process of oily(waste)water comprises the steps: successively
A, coarse filtration: oily(waste)water enters water collecting basin by grid;
The coagulation of H, suspended substance: add concentration and be 10～20% aluminium chlorohydroxide coagulating agent in water collecting basin, the throwing amount is 10～25mg/L;
B, an oily water separation: the oily(waste)water in the water collecting basin is sent into oily-water seperating equipment, and sewage carries out preliminary oily water separation;
C, air supporting are handled: the water outlet of oily-water seperating equipment enters the pressurized dissolved air flotation pond, and water outlet is 15～40min in the air flotation pool residence time, and available depth is 1.0～2.0m, and surface load is 2.0～5.0m
3/ m
2H;
D, secondary oil water sepn: the water outlet of air flotation pool is sent into oily-water seperating equipment and is carried out oily water separation;
E, the water outlet of secondary oil water sepn enter tank;
F, filter and sterilisation step once more: the water in the tank is filtered once more, the suspension content in the water outlet is reached≤5mg/L; Filter water outlet and enter clean water basin, squeeze into the reuse water pipe network system at last through after disinfecting.
G, waste oil recycling step: the waste oil that two sections oily-water seperating equipments in B, the D step are discharged is pooled to behind the waste oil pool with being pumped into oily-water seperating equipment, carries out the waste oil reuse after the oily water separation, and the effluent recycling of oleaginousness＜10mg/L is to step B.
A kind of system that uses this technology comprises that successively ingress is provided with the water collecting basin of grid, parallel flow intercepter, pressurized dissolved air flotation pond, parallel flow intercepter, tank, filtration unit.Said pressurized dissolved air flotation pond is made up of pressure air-dissolving system, molten gas release system and dissolved air flotation system.Said filtration unit is a pressure filter, strainer water inlet SS≤20mg/L, and water outlet SS≤5mg/L, operating pressure≤0.4MPa, working temperature is 5～50 ℃.Said parallel flow intercepter all is connected with waste oil pool, and described waste oil pool is connected with the waste oil reuse tank through oily-water seperating equipment.
Concrete treating processes is described below: plant area's oily(waste)water enters water collecting basin by grid; Adding concentration is 15% aluminium chlorohydroxide coagulating agent in water collecting basin, and the throwing amount is 20mg/L: the waste water in the water collecting basin is squeezed into first section parallel flow intercepter with lift pump and carried out an oily water separation; The pressurized dissolved air flotation pond is sent in the water outlet of an oily water separation, stopped 30 minutes, available depth is 1.5m, and surface load is 2.5m
3/ m
2H, by 20% reflux ratio clear water is squeezed into dissolving from clean water basin with pressure pump during work, simultaneously squeezing into pressurized air in the dissolving makes it become pressure air-dissolving water, and finish energy dissipating, decompression process in the air flotation pool exposure chamber by dissolved air release by pipeline, making it dissolve in gas discharges with the form of microvesicle, and equably with sewage in elaioleucite adsorb mutually, form little oil group; The water outlet of handling through air supporting enters second section parallel flow intercepter and carries out the secondary oil water sepn, makes oil content and water obtain more effective the separation; The water outlet of second section parallel flow intercepter enters tank, and the waste water of this moment can discharge.
If above-mentioned waste water does not discharge, then the water in the tank being sent into pressure filter with lift pump filters once more, filter water outlet and handle through sterilization equipment, for example chlorine dioxide generator is handled after clean water basin are squeezed into the reuse water pipe network system, and waste water can be realized reuse.
The waste oil of two sections oil trap discharges is pooled to waste oil pool earlier, sends into water-and-oil separator with lift pump then and carries out oily water separation, and the waste oil after the separation enters the waste oil reuse tank and treats reuse, effluent recycling to the first section parallel flow intercepter circular treatment.
Claims (10)
1, a kind of treatment process of oily(waste)water comprises the steps successively, and A, coarse filtration: oily(waste)water enters water collecting basin by grid; B, an oily water separation: the oily(waste)water in the water collecting basin is sent into oily-water seperating equipment, and sewage carries out preliminary oily water separation; C, air supporting are handled: the water outlet of oily-water seperating equipment enters the pressurized dissolved air flotation pond; D, secondary oil water sepn: the water outlet of air flotation pool is sent into oily-water seperating equipment and is carried out oily water separation; E, the water outlet of secondary oil water sepn enter tank.
2, the treatment process of a kind of oily(waste)water as claimed in claim 1 is characterized in that: described scheme also comprises F, filters and sterilisation step once more: the water in the tank is filtered once more, the suspension content in the water outlet is reached≤5mg/L; Filter water outlet and enter clean water basin, squeeze into the reuse water pipe network system at last through after disinfecting.
3, the treatment process of a kind of oily(waste)water as claimed in claim 1 or 2, it is characterized in that: described scheme also comprises G, waste oil recycling step: the waste oil that two sections oily-water seperating equipments in B, the D step are discharged is pooled to behind the waste oil pool with being pumped into oily-water seperating equipment, carry out the waste oil reuse after the oily water separation, the effluent recycling of oleaginousness＜10mg/L is to step B.
4, the treatment process of a kind of oily(waste)water as claimed in claim 3, it is characterized in that: the coagulating sedimentation step H that can increase a suspended substance between described option A and the B: add concentration and be 10～20% aluminium chlorohydroxide coagulating agent before an oily water separation, the throwing amount is 10～25mg/L.
5, the treatment process of a kind of oily(waste)water as claimed in claim 4 is characterized in that: among the described step C, water outlet is 15～40min in the air flotation pool residence time, and available depth is 1.0～2.0m, and surface load is 2.0～5.0m
3/ m
2H.
6, the employed system of the treatment process of a kind of oily(waste)water as claimed in claim 1 is characterized in that: comprise that successively ingress is provided with the water collecting basin of grid, oily-water seperating equipment, pressurized dissolved air flotation pond, oily-water seperating equipment and tank.
7, the employed system of the treatment process of a kind of oily(waste)water as claimed in claim 6 is characterized in that: described two oily-water seperating equipments are parallel flow intercepters; Described pressurized dissolved air flotation pond is made up of pressure air-dissolving system, molten gas release system and dissolved air flotation system.
8, as the employed system of treatment process of claim 6 or 7 described a kind of oily(waste)waters, it is characterized in that: also comprise the filtration unit that is connected with tank.
9, the employed system of the treatment process of a kind of oily(waste)water as claimed in claim 8, it is characterized in that: described filtration unit is a pressure filter, strainer water inlet SS≤20mg/L, water outlet SS≤5mg/L, operating pressure≤0.4MPa, working temperature is 5～50 ℃.
10, the employed system of the treatment process of a kind of oily(waste)water as claimed in claim 8, it is characterized in that: described parallel flow intercepter all is connected with waste oil pool, and described waste oil pool is connected with the waste oil reuse tank through oily-water seperating equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073293 CN1778696A (en) | 2004-11-18 | 2004-11-18 | Treatment of oil-bearing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073293 CN1778696A (en) | 2004-11-18 | 2004-11-18 | Treatment of oil-bearing waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1778696A true CN1778696A (en) | 2006-05-31 |
Family
ID=36769171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410073293 Pending CN1778696A (en) | 2004-11-18 | 2004-11-18 | Treatment of oil-bearing waste water |
Country Status (1)
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823798A (en) * | 2010-05-11 | 2010-09-08 | 江苏元宏科技发展有限公司 | Oily water treatment system of hydropower station |
| CN102228871A (en) * | 2011-06-08 | 2011-11-02 | 太原艾柯夫选煤技术有限公司 | Coal slime pressurizing floating method |
| CN101445279B (en) * | 2007-11-28 | 2011-11-09 | 北京石油化工学院 | Compact cyclone air-flotation separation equipment for processing oily wastewater |
| CN102241439A (en) * | 2011-06-01 | 2011-11-16 | 杭州朗利环保工程有限公司 | Lipase biological promoter for treating oil-containing waste water and using method thereof |
| CN102260025A (en) * | 2011-06-24 | 2011-11-30 | 上海亚同环保实业有限公司 | Biochemical pretreatment process of oily wastewater |
| CN102674582A (en) * | 2012-06-01 | 2012-09-19 | 中国瑞林工程技术有限公司 | Device for removing oil slick from turbid circulating water and recovering circulating water in aluminum processing industry |
| CN103420536A (en) * | 2013-08-30 | 2013-12-04 | 北京英特环科水处理工程设备有限公司 | Treatment device and method for reutilization of leather waste water |
| CN106277505A (en) * | 2016-09-06 | 2017-01-04 | 西安石油大学 | A kind of oil field reinjection water total system |
| CN107265711A (en) * | 2017-08-07 | 2017-10-20 | 苏州久沛环保科技有限公司 | The air-flotation process technique of oily waste water |
| CN108843276A (en) * | 2018-06-12 | 2018-11-20 | 中国石油天然气股份有限公司 | Casing deformation well involving swab method |
| CN110028186A (en) * | 2019-02-28 | 2019-07-19 | 苏州希图环保科技有限公司 | A kind of high-concentration emulsified liquid efficient treatment process |
-
2004
- 2004-11-18 CN CN 200410073293 patent/CN1778696A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445279B (en) * | 2007-11-28 | 2011-11-09 | 北京石油化工学院 | Compact cyclone air-flotation separation equipment for processing oily wastewater |
| CN101823798A (en) * | 2010-05-11 | 2010-09-08 | 江苏元宏科技发展有限公司 | Oily water treatment system of hydropower station |
| CN102241439A (en) * | 2011-06-01 | 2011-11-16 | 杭州朗利环保工程有限公司 | Lipase biological promoter for treating oil-containing waste water and using method thereof |
| CN102228871A (en) * | 2011-06-08 | 2011-11-02 | 太原艾柯夫选煤技术有限公司 | Coal slime pressurizing floating method |
| CN102228871B (en) * | 2011-06-08 | 2013-01-30 | 太原艾柯夫选煤技术有限公司 | Coal slime pressurizing floating method |
| CN102260025A (en) * | 2011-06-24 | 2011-11-30 | 上海亚同环保实业有限公司 | Biochemical pretreatment process of oily wastewater |
| CN102260025B (en) * | 2011-06-24 | 2013-04-17 | 上海亚同环保实业有限公司 | Biochemical pretreatment process of oily wastewater |
| CN102674582B (en) * | 2012-06-01 | 2014-01-01 | 中国瑞林工程技术有限公司 | Device for removing oil slick from turbid circulating water and recovering circulating water in aluminum processing industry |
| CN102674582A (en) * | 2012-06-01 | 2012-09-19 | 中国瑞林工程技术有限公司 | Device for removing oil slick from turbid circulating water and recovering circulating water in aluminum processing industry |
| CN103420536A (en) * | 2013-08-30 | 2013-12-04 | 北京英特环科水处理工程设备有限公司 | Treatment device and method for reutilization of leather waste water |
| CN103420536B (en) * | 2013-08-30 | 2016-01-20 | 北京英特环科水处理工程设备有限公司 | A kind of leather waste water recycling treatment facility and method |
| CN106277505A (en) * | 2016-09-06 | 2017-01-04 | 西安石油大学 | A kind of oil field reinjection water total system |
| CN106277505B (en) * | 2016-09-06 | 2019-05-10 | 西安石油大学 | A kind of oil field reinjection water total system |
| CN107265711A (en) * | 2017-08-07 | 2017-10-20 | 苏州久沛环保科技有限公司 | The air-flotation process technique of oily waste water |
| CN108843276A (en) * | 2018-06-12 | 2018-11-20 | 中国石油天然气股份有限公司 | Casing deformation well involving swab method |
| CN110028186A (en) * | 2019-02-28 | 2019-07-19 | 苏州希图环保科技有限公司 | A kind of high-concentration emulsified liquid efficient treatment process |
| CN110028186B (en) * | 2019-02-28 | 2022-03-11 | 苏州希图环保科技有限公司 | High-efficiency treatment process for high-concentration emulsion |
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