CN105174368A - Oil-containing sewage treatment apparatus and oil-containing sewage treatment method - Google Patents
Oil-containing sewage treatment apparatus and oil-containing sewage treatment method Download PDFInfo
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- CN105174368A CN105174368A CN201510549513.2A CN201510549513A CN105174368A CN 105174368 A CN105174368 A CN 105174368A CN 201510549513 A CN201510549513 A CN 201510549513A CN 105174368 A CN105174368 A CN 105174368A
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Abstract
The present invention provides an oil-containing sewage treatment apparatus, which comprises: a deoiling purification device for carrying out oil-water separation on oil-containing sewage to obtain oil-containing scum and clear water; and a scum separation device communicated with the deoiling purification device and used for carrying out dewatering treatment on the oil-containing scum and carrying out oil-water separation so as to obtain scum, waste oil and water. The present invention further provides an oil-containing sewage treatment method. With the treatment apparatus and the treatment method of the present invention, the deoiling purification device and the scum separation device are used, the oil-containing sewage is subjected to oil-water separation to obtain the oil-containing scum and the clear water, then the oil-containing scum is subjected to dewatering treatment, and finally the oil-water separation is performed to obtain the scum, the waste oil and the water, wherein the waste oil removal rate in the oil-containing sewage can achieve more than or equal to 96%, and the scum reduction rate is more than or equal to 70%.
Description
Technical field
The present invention relates to chemical field, particularly relate to a kind of oil-contained waste water treatment device and treatment process.
Background technology
Delay coking process is one of main method of current mink cell focus highly-efficient processing.Delay coking process mainly process raw material for: subtract end residual oil, catalytic slurry, the cold slag in tank field, asphalt slag etc., these raw materials can produce a large amount of oily(waste)waters in the course of processing, mainly comprise the large air blowing water of condensation, coke cooling water, coke cutting water etc. that produce in " cold Jiao " process in this oily(waste)water.This part oily(waste)water not only containing lightweight sump oil component, phenols, Ppolynuclear aromatic and nitrogenous, oxygen, sulphur heterogeneous ring compound etc. that a large amount of emulsification is serious, and is rich in the foul gas of multiple highly volatile.
Because the domestic treatment technology to this oily(waste)water is also not overripened, most refinery generally all takes simple deposition dehydrating to this part oily(waste)water, then with after the dilution of large water gaging, in line enter the processing mode of Sewage treatment systems in downstream.High oil content component is very large to the load impact of sewage work, especially affects follow-up biochemical treatment, directly the total Con trolling index such as oil-contg, COD of discharging water of impact.Therefore, how efficient processing delay coker oily(waste)water becomes the difficult problem perplexing Ge great refinery, is subject to the attention of more and more refinery.
Oil-containing dross has the features such as generation is large, water ratio is high, mink cell focus component is high, comprehensive utilization mode is few, processed difficulty is large.Because its existence has detrimentally affect to the environmental quality of surrounding, domestic most refinery generally adopts centrifugal dewatering technology process, but result is all not satisfactory, be mainly manifested in: in scum silica frost, profit difficulty is separated, the water ratio of oil-containing dross is many between 75% ~ 85%, after filtering, suspension content is high in water, processing cost large and spin-on filter device because of long-term high speed rotating, energy consumption high.
In sum, find a kind of sump oil can efficiently removed in oily(waste)water, the oil-contained waste water treatment device of scum silica frost and treatment process and become the task of top priority.
Summary of the invention
Based on this, provide the oil-contained waste water treatment device of a kind of sump oil can efficiently removed in oily(waste)water, scum silica frost.
In addition, a kind of oil-contaminated water processing method is also provided.
A kind of oil-contained waste water treatment device, comprising:
Oil removal purification device, for oily(waste)water is carried out oily water separation, obtains oil-containing dross and clear water; And
The dross separation apparatus be communicated with described oil removal purification device, for described oil-containing dross is carried out oily water separation after processed, obtains scum silica frost, sump oil and water.
Wherein in an embodiment, described oil removal purification device comprises:
Line mixer, for by oily(waste)water and oil removing dispersant, obtains mixed solution;
The micro-nano bubble generator be communicated with described line mixer, produces a large amount of micro-nano bubbles for making in described mixed solution, form air-water mixture; And
The water-and-oil separator be communicated with described micro-nano bubble generator, carries out oily water separation, obtains oil-containing dross and clear water after being mixed with high effective additives by described air-water mixture.
Wherein in an embodiment, described oil removal purification device also comprises automatic chemical feeding system, and described automatic chemical feeding system is described except oil dispersant and described high effective additives for adding respectively.
Wherein in an embodiment, described dross separation apparatus comprises:
The integral type scum silica frost separating machine be communicated with described water-and-oil separator, for described oil-containing dross is carried out processed, obtains scum silica frost and oil-water mixture; And
The gun barrel be communicated with described integral type scum silica frost separating machine, for described oil-water mixture is carried out oily water separation, obtains sump oil and water.
Wherein in an embodiment, described oil-contained waste water treatment device also comprises clean water tank and slag ladle, and described clean water tank is communicated with described water-and-oil separator, and described water-and-oil separator is communicated with described integral type scum silica frost separating machine by described slag ladle.
A kind of oil-contaminated water processing method, comprises the following steps:
Oily(waste)water is carried out oily water separation, obtains oil-containing dross and clear water; And
Described oil-containing dross is carried out oily water separation after processed, obtains scum silica frost, sump oil and water.
Wherein in an embodiment, described oily(waste)water is carried out oily water separation, the step obtaining oil-containing dross and clear water is specially:
By oily(waste)water and oil removing dispersant, obtain mixed solution;
Make in described mixed solution, to produce a large amount of micro-nano bubbles, form air-water mixture; And
Carry out oily water separation after being mixed with high effective additives by described air-water mixture, obtain oil-containing dross and clear water.
Wherein in an embodiment, described except oil dispersant be aluminium iron polychloride, polymerize aluminum chloride, poly-ferric chloride or bodied ferric sulfate; The described concentration except oil dispersant is 50mg/L ~ 2000mg/L; Described high effective additives is polyacrylamide; The concentration of described polyacrylamide is 6mg/L ~ 200mg/L.
Wherein in an embodiment, described oil-containing dross is carried out oily water separation after processed, and the step obtaining scum silica frost, sump oil and water is specially:
Described oil-containing dross is carried out processed, obtains scum silica frost and oil-water mixture; And
Described oil-water mixture is carried out oily water separation, obtains sump oil and water.
Wherein in an embodiment, described oily(waste)water is carried out the step of oily water separation before further comprising the steps of:
Described oily(waste)water is filtered.
Above-mentioned oil-contained waste water treatment device and method, adopt oil removal purification device and dross separation apparatus, first oily(waste)water carried out oily water separation, obtain oil-containing dross and clear water, then oil-containing dross is carried out oily water separation after processed, obtain scum silica frost, sump oil and water.In oily(waste)water, sump oil clearance can reach more than 96%, and scum silica frost reduction rate is more than 70%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the oil-contained waste water treatment device of an embodiment.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.
Refer to Fig. 1, the oil-contained waste water treatment device of an embodiment, comprise oil removal purification device and dross separation apparatus.
Oil removal purification device is used for oily(waste)water to carry out oily water separation, obtains oil-containing dross and clear water.
Dross separation apparatus is communicated with oil removal purification device, for oil-containing dross is carried out oily water separation after processed, obtains scum silica frost, sump oil and water.
Wherein, oil removal purification device comprises line mixer 12, micro-nano bubble generator 14 and water-and-oil separator 16.
Line mixer 12, for by oily(waste)water and oil removing dispersant, obtains mixed solution.
Micro-nano bubble generator 14 is communicated with line mixer 12.Micro-nano bubble generator 14, for making to produce a large amount of micro-nano bubbles in above-mentioned mixed solution, forms air-water mixture.
Concrete, micro-nano bubble generator 14 directly can pass through the mixed solution generation microbubble except oil dispersant and oily(waste)water are formed, and without the need to producing microbubble with backwater.
Water-and-oil separator 16 is communicated with micro-nano bubble generator 14.Water-and-oil separator 16 carries out oily water separation after being mixed with high effective additives by above-mentioned air-water mixture, obtains oil-containing dross and clear water.
Wherein, clear water can be used as the coke cooling water reuse of coker.
Be appreciated that the oil-contained waste water treatment device of present embodiment also comprises clean water tank 17 in order to this part clear water of reuse.Clean water tank 17 is communicated with water-and-oil separator 16, for reclaiming above-mentioned clear water.
In the present embodiment, above-mentioned oil removal purification device also comprises automatic chemical feeding system 18.Automatic chemical feeding system 18 is communicated with water-and-oil separator 16 with line mixer 12 respectively.
Automatic chemical feeding system 18 is for adding respectively except oil dispersant and high effective additives.Wherein, except oil dispersant adds the inlet end at line mixer 12, high effective additives adds the inlet end at water-and-oil separator 16.
Wherein, dross separation apparatus comprises integral type scum silica frost separating machine 22 and gun barrel 24.
Integral type scum silica frost separating machine 22 is communicated with water-and-oil separator 16.Integral type scum silica frost separating machine 22, for above-mentioned oil-containing dross is carried out processed, obtains scum silica frost and oil-water mixture.
Concrete, in the present embodiment, above-mentioned oil-contained waste water treatment device also comprises slag ladle 19.Water-and-oil separator 16 is communicated with integral type scum silica frost separating machine 22 by slag ladle 19.Oil-containing dross is delivered to integral type scum silica frost separating machine 22 and is carried out processed after slag ladle 19 is assembled.
Wherein, oil-containing dross is after processed, and solid phase is by burning after the mummification of alkali formula or heat drying.
Gun barrel 24 is communicated with integral type scum silica frost separating machine 22.Gun barrel 24, for above-mentioned oil-water mixture is carried out oily water separation, obtains sump oil and water.
Wherein, sump oil can enter coker freshening, and water can be used as the coke cooling water reuse of coker, or delivers to sewage work and be for further processing.
It should be noted that, if containing more macromolecular solid particulate matter in oily(waste)water, above-mentioned oil-contained waste water treatment device can also comprise strainer and impeller pump, and oily(waste)water, through filter, filters and comparatively sends in line mixer 12 through impeller pump after macromolecular solid particulate matter.
Concrete, strainer is T-shape or " Y " type filter.
Above-mentioned oil-contained waste water treatment device, in oily(waste)water, sump oil, COD and sulfide clearance can reach more than 96%, 87% and 83% respectively, oil-containing dross is after processed, solid phase impurity removal percentage is more than 95%, scum silica frost reduction rate is more than 70%, the water of discharging in the clear water of simultaneously discharging in water-and-oil separator 16 and gun barrel 24 can directly as the make up water of coke cooling water, in oil-containing dross, most of sump oil obtains recycling, improve the environmental aspect of refinery, there is considerable economic benefit.
A kind of oil-contaminated water processing method, comprises the following steps:
S110, oily(waste)water to be filtered.
Oily(waste)water is filtered, filters more macromolecular solid particulate matter.
Be appreciated that step S110 can omit if there is not more macromolecular solid particulate matter in oily(waste)water.
S120, oily(waste)water is carried out oily water separation, obtain oil-containing dross and clear water.
Wherein, oily(waste)water is carried out oily water separation, the step obtaining oil-containing dross and clear water is specially:
S1201, by oily(waste)water and oil removing dispersant, obtain mixed solution.
Wherein, except oil dispersant is inorganic polymer flocculant.
Preferably, except oil dispersant is aluminium iron polychloride (PAFC), polymerize aluminum chloride (PAC), poly-ferric chloride (PFC) or bodied ferric sulfate (PFS).
Effective concentration except oil dispersant is 50mg/L ~ 2000mg/L, namely except the concentration of oil dispersant in oily(waste)water is 50mg/L ~ 2000mg/L.
Be appreciated that and can add according to oil content concentration in oily(waste)water or on-the-spot effluent quality requirement except oil dispersant adds concentration.
Concrete, oily(waste)water fully mixes in line mixer 12 with except oil dispersant, carries out breakdown of emulsion reaction, obtains mixed solution.
S1202, make in above-mentioned mixed solution, to produce a large amount of micro-nano bubbles, form air-water mixture.
Concrete, mixed solution enters micro-nano bubble generator 14 and forms high velocity flow, and form liquid film with certain pressure gas through nanometer scale ceramics film pipeline, high velocity flow is constantly sheared liquid film and produced a large amount of micro-nano bubbles simultaneously.
S1203, above-mentioned air-water mixture is mixed with high effective additives after carry out oily water separation, obtain oil-containing dross and clear water.
Wherein, high effective additives is polyacrylamide (PAM).This polyacrylamide comprises the polyacrylamide of nonionic, positively charged ion, negatively charged ion and amphoteric Four types.
The effective concentration of high effective additives is 6mg/L ~ 200mg/L, and namely the concentration of high effective additives in oily(waste)water is 6mg/L ~ 200mg/L.Concrete, after air-water mixture fully mixes with high effective additives, enter water-and-oil separator 16, carry out oily water separation, obtain oil-containing dross and clear water.
Wherein, clear water can be used as the make up water of the coke cooling water injected in green coke process.
S130, above-mentioned oil-containing dross is carried out oily water separation after processed, obtain scum silica frost, sump oil and water.
Wherein, above-mentioned oil-containing dross is carried out oily water separation after processed, the step obtaining scum silica frost, sump oil and water is specially:
S1301, above-mentioned oil-containing dross is carried out processed, obtain scum silica frost and oil-water mixture.
Concrete, above-mentioned oil-containing dross is carried out processed through integral type scum silica frost separating machine 22, obtains scum silica frost and oil-water mixture.
In the present embodiment, oil-containing dross is delivered to integral type scum silica frost separating machine 22 and is carried out processed after slag ladle 19 is assembled, and obtains scum silica frost and oil-water mixture.
Oil-containing dross is after processed, and solid phase is by burning after the mummification of alkali formula or heat drying.
S1302, above-mentioned oil-water mixture is carried out oily water separation, obtain sump oil and water.
Concrete, above-mentioned oil-water mixture is carried out oily water separation in gun barrel 24, obtains sump oil and water.
Wherein, sump oil can enter coker freshening, and water can be used as the coke cooling water reuse of coker, or delivers to sewage work and be for further processing.
Above-mentioned oil-contaminated water processing method is simple, in oily(waste)water, sump oil, COD and sulfide clearance can reach more than 96%, 87% and 83% respectively, oil-containing dross is after processed, solid phase impurity removal percentage is more than 95%, scum silica frost reduction rate is more than 70%, the water of discharging in the clear water of simultaneously discharging in water-and-oil separator 16 and gun barrel 24 can directly as the make up water of coke cooling water, in oil-containing dross, most of sump oil obtains recycling, improve the environmental aspect of refinery, there is considerable economic benefit.
Above-mentioned oil-contained waste water treatment device and treatment process can efficiently process refinery oily(waste)water, and the oily(waste)water that especially can produce for delayed coking unit, comprises air blowing water of condensation, coke cooling water, coke cutting water etc.
It is below specific embodiment.
Embodiment 1
Oil-bearing wastewater in delayed coking unit of refinery works (primarily of air blowing water of condensation and coke cooling water composition), this oily(waste)water outward appearance in yellow, emulsification serious, a small amount of black greasy dirt of surface entrainment with foul odour.
By above-mentioned oily(waste)water through T-shape line strainer, send in line mixer through impeller pump after filtering more macromolecular solid particulate matter, fully mix with except oil dispersant, carry out breakdown of emulsion reaction, reaction times 3s ~ 5s, obtains mixed solution.
Make in mixed solution, to produce a large amount of micro-nano bubbles, form air-water mixture.
Air-water mixture is mixed with high effective additives, enters water-and-oil separator, sedimentation 30min after reaction 3min ~ 5min, obtain oil-containing dross and clear water.Clear water can directly as the make up water of the coke cooling water injected in green coke process.
Oil-containing dross is delivered to integral type scum silica frost separating machine and is carried out processed after slag ladle is assembled, and obtains scum silica frost and oil-water mixture.Scum silica frost is by burning after the mummification of alkali formula, heat drying.
Oil-water mixture carries out oily water separation in gun barrel, obtains sump oil and water.Sump oil can enter coker freshening, and water can be used as the coke cooling water reuse of coker, or delivers to sewage work and be for further processing.
In embodiment 1, the process index of oily(waste)water is as shown in table 1.
Embodiment 2
Oil-bearing wastewater in delayed coking unit of refinery works (primarily of air blowing water of condensation and coke cooling water composition), this oily(waste)water outward appearance in yellow, emulsification serious, a small amount of black greasy dirt of surface entrainment with foul odour.
By above-mentioned oily(waste)water through T-shape line strainer, send in line mixer through impeller pump after filtering more macromolecular solid particulate matter, fully mix with except oil dispersant, carry out breakdown of emulsion reaction, reaction times 3s ~ 5s, obtains mixed solution.
Make in mixed solution, to produce a large amount of micro-nano bubbles, form air-water mixture.
Air-water mixture is mixed with high effective additives, enters water-and-oil separator, sedimentation 30min after reaction 3min ~ 5min, obtain oil-containing dross and clear water.Clear water can directly as the make up water of the coke cooling water injected in green coke process.
Oil-containing dross is delivered to integral type scum silica frost separating machine and is carried out processed after slag ladle is assembled, and obtains scum silica frost and oil-water mixture.Scum silica frost is by burning after the mummification of alkali formula, heat drying.
Oil-water mixture carries out oily water separation in gun barrel, obtains sump oil and water.Sump oil can enter coker freshening, and water can be used as the coke cooling water reuse of coker, or delivers to sewage work and be for further processing.
In embodiment 2, the process index of oily(waste)water is as shown in table 1.
Table 1 oily water treatment index
As can be seen from Table 1, utilize the oily(waste)water after oil-contaminated water processing method process herein, its oil-contg, COD and sulfide clearance are respectively more than 99%, 99% and 83%, and processing efficiency is high, and water outlet can directly as the make up water of coke cooling water.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an oil-contained waste water treatment device, is characterized in that, comprising:
Oil removal purification device, for oily(waste)water is carried out oily water separation, obtains oil-containing dross and clear water; And
The dross separation apparatus be communicated with described oil removal purification device, for described oil-containing dross is carried out oily water separation after processed, obtains scum silica frost, sump oil and water.
2. oil-contained waste water treatment device according to claim 1, is characterized in that, described oil removal purification device comprises:
Line mixer, for by oily(waste)water and oil removing dispersant, obtains mixed solution;
The micro-nano bubble generator be communicated with described line mixer, produces a large amount of micro-nano bubbles for making in described mixed solution, form air-water mixture; And
The water-and-oil separator be communicated with described micro-nano bubble generator, carries out oily water separation, obtains oil-containing dross and clear water after being mixed with high effective additives by described air-water mixture.
3. oil-contained waste water treatment device according to claim 2, is characterized in that, described oil removal purification device also comprises automatic chemical feeding system, and described automatic chemical feeding system is described except oil dispersant and described high effective additives for adding respectively.
4. oil-contained waste water treatment device according to claim 2, is characterized in that, described dross separation apparatus comprises:
The integral type scum silica frost separating machine be communicated with described water-and-oil separator, for described oil-containing dross is carried out processed, obtains scum silica frost and oil-water mixture; And
The gun barrel be communicated with described integral type scum silica frost separating machine, for described oil-water mixture is carried out oily water separation, obtains sump oil and water.
5. oil-containing sewage treatment system according to claim 4, it is characterized in that, described oil-contained waste water treatment device also comprises clean water tank and slag ladle, and described clean water tank is communicated with described water-and-oil separator, and described water-and-oil separator is communicated with described integral type scum silica frost separating machine by described slag ladle.
6. an oil-contaminated water processing method, is characterized in that, comprises the following steps:
Oily(waste)water is carried out oily water separation, obtains oil-containing dross and clear water; And
Described oil-containing dross is carried out oily water separation after processed, obtains scum silica frost, sump oil and water.
7. oil-contaminated water processing method according to claim 6, is characterized in that, described oily(waste)water is carried out oily water separation, and the step obtaining oil-containing dross and clear water is specially:
By oily(waste)water and oil removing dispersant, obtain mixed solution;
Make in described mixed solution, to produce a large amount of micro-nano bubbles, form air-water mixture; And
Carry out oily water separation after being mixed with high effective additives by described air-water mixture, obtain oil-containing dross and clear water.
8. oil-contaminated water processing method according to claim 7, is characterized in that, described except oil dispersant be aluminium iron polychloride, polymerize aluminum chloride, poly-ferric chloride or bodied ferric sulfate; The described concentration except oil dispersant is 50mg/L ~ 2000mg/L; Described high effective additives is polyacrylamide; The concentration of described polyacrylamide is 6mg/L ~ 200mg/L.
9. oil-contaminated water processing method according to claim 7, is characterized in that, described oil-containing dross is carried out oily water separation after processed, and the step obtaining scum silica frost, sump oil and water is specially:
Described oil-containing dross is carried out processed, obtains scum silica frost and oil-water mixture; And
Described oil-water mixture is carried out oily water separation, obtains sump oil and water.
10. according to claim 6 containing sewage water treatment method, it is characterized in that, described oily(waste)water is carried out the step of oily water separation before further comprising the steps of:
Described oily(waste)water is filtered.
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| CN111732297A (en) * | 2020-08-06 | 2020-10-02 | 中国石油化工股份有限公司 | Method and apparatus for enhancing natural attenuation of petroleum hydrocarbon contaminated groundwater |
| CN112143895A (en) * | 2019-06-28 | 2020-12-29 | 铜陵富翔铜再生循环利用有限公司 | Method for recovering copper from oil-containing waste copper |
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