CN105060569A - Process method for treating suspended matter or oil contamination in water at the bottom of cabin - Google Patents
Process method for treating suspended matter or oil contamination in water at the bottom of cabin Download PDFInfo
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- CN105060569A CN105060569A CN201510529181.1A CN201510529181A CN105060569A CN 105060569 A CN105060569 A CN 105060569A CN 201510529181 A CN201510529181 A CN 201510529181A CN 105060569 A CN105060569 A CN 105060569A
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Abstract
The invention discloses a process method for treating suspended matter or oil contamination in the water at the bottom of a cabin. The process method comprises the main process steps that waste water containing suspended matter or oil contamination from a production process is mixed with a clear water flotation agent, the mixed liquid is pressurized by a booster pump and then is fed into a primary rotary-flow gas flotation device at high speed, gas and liquid mixing is completed in a positive pressure mode, air bubbles wrap the suspended matter or the oil contamination contained in the water and combined with the flotation agent and then are fed into a secondary rotary-flow gas flotation device, and the suspended matter or the oil contamination wrapped by the air bubbles floats out of the water surface; a bottom flowing phase flows into a production water process bin, an overflow phase enters a stirring system, a centrifugal separation system conducts centrifugal separation on the waste water after the overflow phase is mixed with a clear water coagulant aid, and further thorough waste water treatment is achieved. Water output by a whole set of devices is mixed together, the mixed water serves as a water product to be returned to the production process, and produced sludge serves as solid waste to be subjected to unified treatment.
Description
Technical field
The invention belongs to sewage treatment area, especially for the separation field of solid, liquid suspension in sewage, be specifically related to a kind of the cyclone air-flotation device and the process matched therewith that remove suspended substance or greasy dirt in limber water.
Background technology
Bilge water treatment problems faced by long-term as offshore oilfield manifests day by day to the puzzlement that flow process is brought, and has badly influenced the normal profit process of FPSO and outer transporting operation.At present, limber water about more than 20000 side is had with regard to certain FPSO.
This water can not the reason of direct outer row mainly due to the greasy dirt wherein containing trace and a large amount of suspended substance, this part medium enters flow process will cause the extremely unstable of flow process, and this most unmanageable part exactly, suspended substance source in water has a lot, the flocculation that main source has oil well liquid-producing (clay, colloid, well finishing liquid etc.), enters the impurity of floor drain (comprising dust on deck, earth, part dead oil, muddy wet goods), the existing chemical agent of platform is formed in treating processes and the suspended substance that produces.Owing to returning the contaminating impurity such as suspended substance, earth in row, follow-up effluent treatment and filtering by drilling fluid, define stable colloidal suspensoid, with a large amount of electric charge, complicated component, the equal property of matter is poor, and these all bring great difficulty to the removal of this dirty water purification and suspended substance.
In prior art, platform try production major equipment has: swash plate oil eliminator, induced air flotation machine, production water pretreatment tank, peach shell strainer, slop oil tank and Water Tank and corresponding transferpump etc.
Realizing in process of the present invention, contriver finds that prior art at least exists following problem:
According to existing sewage treatment process, the treatment effect for the particularly suspended substance of oil-containing of suspended substance in sewage is very poor, and original equipment and flow process volume is large, the reaction times is slow, the treatment time is long, maintenance workload greatly and costly, water quality owes up to standard.
Comprehensive above analysis: contriver, according to previous experiences, in conjunction with the cyclone air-flotation flotation of current advanced person and the technique of flocculation separation, has formulated the process program described in the present invention and solved above height containing suspended substance sewage handling problem.
Summary of the invention
Goal of the invention: in order to solve the deficiencies in the prior art, the invention provides a kind of processing method processing suspended substance or greasy dirt in limber water, it is the limber water treatment process that a set of physics and chemistry combines, physics aspect is based on cyclone air-flotation equipment, supportingly have delivery system, be uniformly mixed system and centrifugal separation system etc., the medicament that chemical aspect is matched by clear water flotation agent and clear water coagulant aids etc. forms.
Technical scheme: a kind of processing method processing suspended substance or greasy dirt in limber water, comprises the steps:
(1), by the sewage containing suspended substance or greasy dirt produced in Production Flow Chart import in topping-up pump, the top hole pressure after topping-up pump supercharging controls at 0.7 ~ 1.0MPa; Before sewage enters topping-up pump, add clear water flotation agent, after liquid mixes with clear water flotation agent in the future, enter one-level cyclone air-flotation equipment by water sprayer with the high speed of 7 ~ 12m/s;
(2) dissolved air water is with the malleation form of 0.3 ~ 0.6MPa in one-level cyclone air-flotation equipment, completes the dissolving of gas in liquid phase medium, and the suspended substance of unnecessary bubble in water or greasy dirt are combined, and carries out being separated for the first time of suspended substance or greasy dirt and water;
(3) above-mentioned dissolved air water is entered secondary rotary gas floating apparatus by the water inlet water sprayer of secondary rotary gas floating apparatus, with the pressure-fired form of 0.05 ~ 0.1MPa in secondary rotary gas floating apparatus, dissolved gases release in liquid phase medium is overflowed and forms microbubble, the microbubble that the bleed of hydrous water emitter manufactures, adheres to suspended substance in water or greasy dirt, wraps up floating to the water surface together;
(4) flow in the surge tank in stirring system floating to the suspended substance of the water surface or the overflow facies such as greasy dirt, bubble material by the overflow blowdown mouth being arranged on secondary rotary gas floating apparatus top; And qualified production water is discharged through underflow after purification, flow in production water conservancy project skill storehouse and treat subsequent disposal;
(5) overflow facies entered in surge tank is controlled to drain into stirred pot by this tank level control valve automatically, clear water coagulant aids is quantitatively added in stirred pot, suspended substance in sewage or greasy dirt are reunited together, form larger particle, through high speed centrifugation separation system, centrifugation is carried out to sewage again, and then accomplish the thorough process to sewage; In centrifugation systems, the water of output and the water of secondary rotary gas floating apparatus output mix and are transmitted back to Production Flow Chart as product water, and the mud of output is as the unified process of solid waste.
As further optimization: the described water temperature containing the sewage of suspended substance or greasy dirt is 50 DEG C ~ 80 DEG C.
As further optimization: described clear water flotation agent is with the efficient clear water flotation agent of the cationic medicament mixed preparing of the non-ionic type of 0 ~ 500ppm concentration and 0 ~ 500ppm concentration.
As further optimization: described clear water coagulant aids is clay or polyacrylamide flocculation agent.
As further optimization: described one-level cyclone air-flotation equipment and secondary rotary gas floating apparatus are the cyclone air-flotation equipment of band inner tube structure.
As further optimization: the centrifugation apparatus in described centrifugal separation system is horizontal helical type efficient centrifugal machine.
As further optimization: also comprise noble gas, described noble gas is water-fast rare gas element: as nitrogen, argon gas.
Beneficial effect: the present invention is based on cyclone air-flotation and flocculation separation, supportingly there is delivery system, be uniformly mixed the equipment such as system and centrifugal separation system, the process program of suspended substance or greasy dirt in the process limber water in addition through testing the complete set of suitable medicament composition such as the clear water flotation agent, clear water coagulant aids etc. determined.First treatment process in the present invention adopts chemical treatment to realize the de-steady and coalescent of suspended substance in sewage system, and in conjunction with current comparatively advanced cyclone air-flotation treatment process, suspended substance is flotated, finally recycle efficient centrifugal separating technology suspended substance is separated with water, reach and thoroughly remove object.
Compared with the conventional method, the present invention has the following advantages:
1, flotation agent by the stirring of pump fully with carry out liquid and mix, then through high pressure water emitter, gas, water and flotation agent are mixed;
2, the gas used in the present invention is the rare gas elementes such as nitrogen, can the oxidation corrosion of effective circumvention device inwall, reduces combustible gas, H
2the security risk that the gases such as S bring to operating process;
3, cyclone air-flotation device is positive airway pressure apparatus, two-stage one group, and one-level air supporting is mainly used in mixing wastewater with air, and gas fully dissolves, unnecessary microbubble parcel suspended particle or oil droplet, carries out just not good liquor, solid (liquid) and is separated; Secondary air-floatation Main Function makes dissolved gases in liquid phase medium, forms microbubble, the microbubble that the bleed of hydrous water emitter manufactures, and suspended substance in water or greasy dirt adhered to, wraps up floating to the water surface, to reach the effect that impurity is separated with water together;
4, equipment described in the present invention is closed suite of equipment, and required noble gas has partly can in internal system recycle, and therefore the usage quantity of noble gas is little, only need supplement a small amount of noble gas to maintain internal system pressure;
5, the few floor space of this complete equipment is little, and efficiency is high, and treatment capacity is large, does not need backwash or cleaning equipment, the support equipments such as the dissolving more not needing legacy equipment to be equipped with, back water pump and slag scraper;
6, mentioned in this sets of plan complete cyclone air-flotation equipment can be widely used in the slagging-off of marine oil production waste, oil extraction processing technological flow;
7, the cyclone air-flotation equipment in the present invention is vertical cylinder structure, medium, with Medium and low intensity cyclonic form motion flow, can not cause the short circuit phenomenon of medium between equipment import/export, and therefore device interior space can fully use, without dead angle, liquid, solid (liquid) separation efficiency are very high; Airfloat equipment inside is provided with anti-scroll bar and overflow blowdown mouth structure, effectively prevents too drastic liquid fluctuating, and liquid, solid (liquid) separating interface are stablized, and can not be caused the secondary pollution to clear water bottom air supporting; This equipment belongs to static equipment again, movement-less part, simple to operate, stable, and maintaining cost is low.
Accompanying drawing explanation
Fig. 1 is limber water processing flow chart of the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Example one: the application of Qinhuangdao 32-6FPSO new century edition cyclone air-flotation device equipment
After Qinhuangdao 32-6FPSO new century edition structure adjusting project is gone into operation, the bilge water treatment problems faced by long-term as oil field, has badly influenced the normal profit process of FPSO new century edition and outer transporting operation.First designing treatment technique adopt chemical treatment to realize the de-steady and coalescent of suspended substance in sewage system, and in conjunction with the cyclone air-flotation equipment described in this programme, suspended substance is flotated, finally recycle efficient centrifugal machine technique and the suspended substance wrapped up through coagulant aids is realized being separated to reach with water thoroughly removing object with centrifugation.
In the process of process, pressure before control air supporting after topping-up pump is 0.7 ~ 1.0MPa, controlling one-level air-floating apparatus internal pressure is 0.3 ~ 0.6MPa, pressure in secondary air-floatation device is 0.05 ~ 0.1MPa, liquid level in control one-level, secondary air-floatation device, in stated limit, controls whizzer flooding velocity to ensure normally to work in the load required by whizzer.All can be reached the requirement of oil-containing≤30mg/L, solid suspension content≤50mg/L by the sewage after the process of this complete equipment, meet the requirement of platform Sewage treatment systems.
Example two: the application of Shuizhong 36-1 petroleum treatment plant CFU type cyclone air-flotation device and Horizontal helical type centrifuge
SZ36-1 oil field is in polymer flooding implementation process, and due to washing away and rolling action of polymers soln, containing polymkeric substance and earth in Produced Liquid, polymer content is substantially at 50 ~ 200mg/L, and every Produced Liquid solid suspension content is incomparably 2 ~ 5m
3; The first stage work of Shuizhong 36-1 petroleum treatment plant production water treatment is responsible for by this cover cyclone air-flotation device, and maximum processing capability can reach 1200m
3/ d, when carrying out oil-containing <5000mg/l in liquid sewage, all can reach after the process of this complete equipment oil-containing≤300mg/L, solid suspension content≤100mg/L, mud moisture≤requirement of 80%, meet the requirement of platform Sewage treatment systems.
Example three: the application of Qinhuangdao 33-1WHP platform CFU-1200 type cyclone air-flotation equipment
CFU-1200 type cyclone air-flotation device is the sewage disposal device that a set of processing power is strong, floor space is little, safety coefficient is higher that my company releases for Qinhuangdao 33-1WHP platform.The first stage work of platform production water treatment is responsible for by this cover cyclone air-flotation device, and maximum processing capability can reach 1440m
3/ d, when carrying out oil-containing <3000mg/L in liquid sewage, all can reach the requirement of oil-containing≤30mg/L, solid suspension content≤50mg/L, meeting the requirement of platform Sewage treatment systems after the process of this complete equipment.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (7)
1. process a processing method for suspended substance or greasy dirt in limber water, it is characterized in that: comprise the steps:
(1), by the sewage containing suspended substance or greasy dirt produced in Production Flow Chart import in topping-up pump, the top hole pressure after topping-up pump supercharging controls at 0.7 ~ 1.0MPa; Before sewage enters topping-up pump, add clear water flotation agent, after liquid mixes with clear water flotation agent in the future, enter one-level cyclone air-flotation equipment by water sprayer with the high speed of 7 ~ 12m/s;
(2) treatment solution is with the malleation form of 0.3 ~ 0.6MPa in one-level cyclone air-flotation equipment, completes the dissolving of gas in liquid phase medium, and the suspended substance of unnecessary bubble in water or greasy dirt are combined, and carries out being separated for the first time of suspended substance or greasy dirt and water;
(3) above-mentioned dissolved air water is entered secondary rotary gas floating apparatus by the water inlet water sprayer of secondary rotary gas floating apparatus, with the pressure-fired form of 0.05 ~ 0.1MPa in secondary rotary gas floating apparatus, dissolved gases release in liquid phase medium is overflowed and forms microbubble, the microbubble that the bleed of hydrous water emitter manufactures, adheres to suspended substance in water or greasy dirt, wraps up floating to the water surface together;
(4) flow in the surge tank in stirring system floating to the suspended substance of the water surface or the overflow facies such as greasy dirt, bubble material by the overflow blowdown mouth being arranged on secondary rotary gas floating apparatus top; And qualified production water is discharged after purification, flow in production water conservancy project skill storehouse and treat subsequent disposal;
(5) overflow facies entered in surge tank is controlled to drain into stirred pot by this tank level control valve automatically, clear water coagulant aids is quantitatively added in stirred pot, suspended substance in sewage or greasy dirt are reunited together, form larger particle, through high speed centrifugation separation system, centrifugation is carried out to sewage again, and then accomplish the thorough process to sewage; In centrifugation systems, the water of output and the water of secondary rotary gas floating apparatus output mix and are transmitted back to Production Flow Chart as product water, and the mud of output is as the unified process of solid waste.
2. the processing method of suspended substance or greasy dirt in process limber water according to claim 1, is characterized in that: the water temperature of the described sewage containing suspended substance or greasy dirt is 50 DEG C ~ 80 DEG C.
3. the processing method of suspended substance or greasy dirt in process limber water according to claim 1, is characterized in that: described clear water flotation agent is with the efficient clear water flotation agent of the cationic medicament mixed preparing of the non-ionic type of 0 ~ 500ppm concentration and 0 ~ 500ppm concentration.
4. the processing method of suspended substance or greasy dirt in process limber water according to claim 1, is characterized in that: described clear water coagulant aids is clay or polyacrylamide flocculation agent.
5. the processing method of suspended substance or greasy dirt in process limber water according to claim 1, is characterized in that: described one-level cyclone air-flotation equipment and secondary rotary gas floating apparatus are the cyclone air-flotation equipment of band inner tube structure.
6. the processing method of suspended substance or greasy dirt in process limber water according to claim 1, is characterized in that: the centrifugation apparatus in described centrifugal separation system is horizontal helical type efficient centrifugal machine.
7. the processing method of suspended substance or greasy dirt in process limber water according to claim 1, it is characterized in that: also comprise noble gas, described noble gas is water insoluble and oily rare gas element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510529181.1A CN105060569A (en) | 2015-08-26 | 2015-08-26 | Process method for treating suspended matter or oil contamination in water at the bottom of cabin |
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| CN201510529181.1A CN105060569A (en) | 2015-08-26 | 2015-08-26 | Process method for treating suspended matter or oil contamination in water at the bottom of cabin |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110642422A (en) * | 2019-09-29 | 2020-01-03 | 青岛双瑞海洋环境工程股份有限公司 | Ship desulfurization air-flotation circulating device, ship waste gas washing system and ship |
| CN113816457A (en) * | 2021-11-23 | 2021-12-21 | 北京石油化工学院 | Integrated treatment process system for acidic produced water in oil field |
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Patent Citations (6)
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| US20130140222A1 (en) * | 2003-09-05 | 2013-06-06 | Foret Plasma Labs, Llc | Treatment of fluids with wave energy from a carbon arc |
| CN101113035A (en) * | 2007-06-22 | 2008-01-30 | 中国石油大学(北京) | Method for treating oil refining sewage by employing multi-stage inflatable cyclonic current technology |
| CN101182080A (en) * | 2007-11-20 | 2008-05-21 | 江苏工业学院 | Water treatment separator device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110642422A (en) * | 2019-09-29 | 2020-01-03 | 青岛双瑞海洋环境工程股份有限公司 | Ship desulfurization air-flotation circulating device, ship waste gas washing system and ship |
| CN113816457A (en) * | 2021-11-23 | 2021-12-21 | 北京石油化工学院 | Integrated treatment process system for acidic produced water in oil field |
| CN113816457B (en) * | 2021-11-23 | 2022-02-25 | 北京石油化工学院 | Integrated treatment process system for acidic produced water in oil field |
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Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |