CN204737754U - Oily water treatment system - Google Patents
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- CN204737754U CN204737754U CN201520264823.5U CN201520264823U CN204737754U CN 204737754 U CN204737754 U CN 204737754U CN 201520264823 U CN201520264823 U CN 201520264823U CN 204737754 U CN204737754 U CN 204737754U
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Abstract
The utility model relates to an oily water treatment system, including one jar of body, one set up to set up at internal whirl air supporting assembled element, the more than one of jar and internal and be located the even gas distribution device of whirl air supporting assembled element below and one arrange the gas -liquid mixture unit in the external portion of jar at the jar, at a lateral wall fastening connection inlet tube of the jar body, at the bottom center of a jar body fastening connection three -way pipe, a drain pipe is connected to a port of three -way pipe, and a backward flow water line is connected to another port of three -way pipe, at the top center of a jar body fastening connection oil collecting pipe, whirl air supporting assembled element includes that an urceolus and a coaxial setting are at the inside inner tube of urceolus, the urceolus is through a plurality of circumference welts and jar inner wall fastening connection of the body, the inlet tube gets into along the tangential and is located the annular gap between urceolus and the inner tube, the gas -liquid mixture unit includes two fine bubble generator, one of them fine bubble generator's inlet connection oily sewage import pipe, the inlet tube of exit end link bit on the wall of jar side, another fine bubble generator's inlet connection backward flow water line, even gas distribution device is connected to the exit end.
Description
Technical field
The utility model relates to a kind of oil-containing sewage treatment system, belongs to environmental technology field.
Background technology
Oily(waste)water wide material sources, oil-gas mining, refining of petroleum, oil product storage/transport/sale, oil and fat chemical, to butcher and the industry such as Meat processing all can produce a large amount of oily(waste)waters.Although the characteristic of different sources oily(waste)water is different, mostly containing principal pollutant such as petroleum-type, COD, BOD, polycyclic aromatic hydrocarbons (PAHs), volatile phenol, suspended solid (SS) and ammonia nitrogens.
Along with the continuous enhancing of whole society's environmental consciousness, the design specifications relevant to oily water treatment is gradually improved, emission standard is increasingly strict, and in recent years, national departments concerned has successively repeatedly promulgated the relevant environment protecting standard of petrochemical industry.Can say that certain degree the process problem of Petroleum and Petrochemical Industry field oily(waste)water is not only an environmental issue, and become an important step in production process.
External relevant oil company and water treating equipment manufacturing enterprise are since phase late 1990s, numerous and confused input huge fund successfully have developed the efficient oily water treatment technology and equipment of a collection of Novel compact, and one of them noticeable trend is that dissolved air flotation technology and low strength eddy flow centrifugal separation technique are carried out organic assembling and proposed multiple cyclone air-flotation integrated apparatus or compact type air-floating apparatus.Make a general survey of external various cyclone air-flotation integrated apparatus or compact type air-floating apparatus, current great majority are still in starting stage and engineering prototype test phase, and the organization plan applied of really succeeding in engineering reality is also few in number.
Domestic, the people such as Inst. of Mechanics, CAS Wu Ying Xiang propose a kind of cyclone air-flotation oily-water seperating equipment and air supporting producer in patent CN102626560A.This device is in operational process, because the pending water entirety in air supporting cylindrical shell is in eddy flow state, and rotary area is excessive, cannot ensure oily(waste)water bear enough swirl strengths and bear the homogeneity of swirl strength, therefore estimate to be difficult to obtain good separating effect.In addition, the micro-bubble generator in vertical cartridge type air-floating apparatus adopts " gauze pad support+nanometer film " structure, is very easily blocked by the suspended solid in oily(waste)water, frequent stoppage in transit must be needed to change cleaning, add maintenance cost in on-the-spot actual moving process.
Jiangsu Jiang Cheng environmental protection equipment Engineering Co., Ltd thanks to literary composition and aims at proposing a kind of oiliness sewage treatment cyclone gas buoyant tank in patent CN202297196U.This apparatus structure is more complicated, and must regularly clean or replace filler, also needs air dissolved pump to provide kinetic energy and solution gas for cyclone air-flotation, causes operation expense higher, be unfavorable for industrial application.
Asia, Jiangsu environmental protection company Jiang Weiguang proposes a kind of integrated multi-functional air-float purification device in CN101993126A.This device utilizes Venturi ejector to inject micro bubble in oily(waste)water, and bubble quality is comparatively large by the impact of oily(waste)water change in flow, cannot ensure the micro bubble producing stable and uniform; This device is higher to oily(waste)water entrance flow rates demand simultaneously, and without buffer structure outside inner core, easily causes current to move down speed excessive, and effective hydraulic detention time is shorter, causes treatment effect undesirable.
The people such as Ningbo Veritas-msi Multiphase Flow Equipment Co., Ltd Ma Lifeng propose a kind of pressure-type air flotation separation device in patent CN101935081A.This device is in process oily(waste)water process, when process water rotates into inner core flotation area from bottom to up from the annular eddy flow district between inner core and inner tank wall, there is intersection in oil phase and aqueous phase flow field, cause the back mixing of part oil phase to enter main body current and discharge from lower drain port, reducing the separating effect of device.In addition, this device adopts gravity mode to receive oil, requires higher to liquid level, and poor to the adaptability that treatment capacity changes and ocean platform rocks.This device small-sized model machine on-the-spot test deoiling effect is better, but is amplified to technical grade product and there will be the problems such as equipment heaviness, floor space are larger.
Enhydra company of partner overseas with it Britain of Shenzhen Ju Tao marine oil Services Co., Ltd proposes a kind of Novel compact type gas floatation separator in patent CN204022509U.Device adopts ejector method of gas injection, produces bubble diameter comparatively large, and poor to the adaptability of sewage water yield fluctuation.Pending water after gas injection tangentially enters inner core, helically fluidised form upwards; Along with pending waterside overcomes potential energy limit spiral, its tangential velocity can reduce gradually, and when arriving inner core top, flow area increases suddenly again, and its tangential velocity is declined further, this section of time portion oil phase can be taken away by main body current, causes device treatment effect undesirable.
What pool of Tianjin Rigid Technology Co., Ltd. is intelligent waits people in patent CN 201932926U, propose a kind of micro-vortex flow type air-flotation wastewater treatment.This device is higher to entrance flow rates demand, and the existence of whirlpool stabilizer not only can not be played current stabilization or eliminate the effect of water vortex, can reduce effective volume and the processing power of air flotation tank on the contrary; In addition adopt many microporous pipe bottom gas distribution modes, be difficult to ensure gas-liquid Homogeneous phase mixing, and add installation and maintenance cost.
In a word, make a general survey of domestic Ge Jia unit disclosed cyclone air-flotation integrated technique organization plan already, be divided into three major types such as not establishing rectification cartridge type, single flow regulating barrels inner eddy flow formula, single flow regulating barrels outer shroud whirlwind-type nothing more than, and mostly resting on Plan Concept or mini engineering model machine stage, the large discharge oil-contained waste water treatment device still not meeting engineering requirements comes out; Engineering amplifies the very poor difficult situation of rear deoiling effect Oil Field test oil removing performance is pretty good even to occur floating organization plan mini engineering model machine based on inner core outward turning streaming cyclone.The maximum throughput of domestic on-the-spot testing results comparatively successful case not yet can more than 85m so far
3/ h (maximum throughput 150m
3the on-the-spot testing results result of/h engineering prototype is extremely disappointing).In view of this, be necessary to carry out system summary combing to domestic and international existing technical scheme, break through correlation technique 'bottleneck' restrictions, as early as possible develop can adapt to large discharge cyclone air-flotation integration oil-containing sewage treatment system, with meet the industries such as domestic petroleum petrochemical industry especially offshore and gas development reality in the urgent need to.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide and a kind ofly eddy flow and air supporting two kinds of isolation technique is organically combined and can meet the oil-containing sewage treatment system of large discharge requirement in engineering.
For achieving the above object, the utility model is by the following technical solutions: a kind of oil-containing sewage treatment system, is characterized in that: it comprise a tank body, be arranged on described tank interior cyclone air-flotation assembled unit, more than one be arranged on described tank interior and the even distribution device and be positioned at below described cyclone air-flotation assembled unit is arranged in the gas-liquid mixed unit of described tank body outside; Be fastenedly connected an inlet tube at the sidewall of described tank body, be fastenedly connected a Y-tube in the bottom centre of described tank body, a port of described Y-tube connects a water shoot, and the another port of described Y-tube connects a recirculation water pipeline; A collection tube is fastenedly connected in the top center of described tank body; Described cyclone air-flotation assembled unit comprises the inner core that a urceolus and is coaxially arranged on described outer barrel, described urceolus and the equal open at both ends of inner core; Described urceolus is connected with the inner wall tightening of described tank body by multiple circumference liner plate; Described inlet tube tangentially enters the annular gap between described urceolus and described inner core; Described gas-liquid mixed unit comprises two micro-bubble generators, and wherein the entrance end of micro-bubble generator described in connects an oily(waste)water inlet pipe, and exit end connects the described inlet tube be positioned on described tank wall; The entrance end of micro-bubble generator described in another connects described recirculation water pipeline, and exit end connects described even distribution device.
Described even distribution device comprises a feed liquor supervisor and multiple Wire wound tube being vertically connected on described feed liquor supervisor both sides, and Wire wound tube described in each is all responsible for described feed liquor and is communicated with; Described feed liquor supervisor connects the exit end of micro-bubble generator described in another.
Between described even distribution device and the outlet at bottom of described tank body, a unhurried current plate is being set.
Flow meters is provided with between described micro-bubble generator and described inlet tube; Described collection tube is provided with a valve and flow meters; Described water shoot is provided with a valve and flow meters; Described recirculation water pipeline is provided with a valve and flow meters; Described recirculation water pipeline and oily(waste)water inlet pipe arrange a tensimeter respectively; One tensimeter and a safety valve are set at the top of described tank body; Described tank body is also provided with a liquidometer.
Taper is arranged in the upper end of described urceolus.
Taper or inverted cone shape are arranged in the lower end of described urceolus.
Described tank body is combined by the cylindrical shell of a cylindrical shape, an oval upper cover and an oval lower cover.
The sidewall of described tank body is provided with a manhole.
The utility model is owing to taking above technical scheme, it has the following advantages: 1, the utility model arranges a cyclone air-flotation assembled unit in tank body, the double-deck flow regulating barrels that cyclone air-flotation assembled unit main part is made up of inner core and urceolus, circular clearance between inner core and urceolus can provide an eddy flow space relatively stably, when tank body internal diameter is enough large, by suitably adjusting scantlings of the structure and the shape of internal layer cylinder and outer layer barrel described in double-deck flow regulating barrels, make it to keep good swirl strength and rotational-flow stable qualitative, relatively stable environment can be provided again for dissolved air flotation process, in addition, below cyclone air-flotation assembled unit, be provided with even distribution device, it is connected with the end of reflux pipeline, is used for realizing being uniformly distributed of required micro bubble in secondary air supporting process, therefore, eddy flow and air supporting two kinds of technology organically combine by the utility model, are greatly improved to the processing efficiency of oily(waste)water, and whole cyclone air-flotation integral system form exquisiteness, compact construction, treatment capacity are large.2, the utility model is provided with unhurried current plate in the below of cyclone air-flotation assembled unit, can be used for the detrimentally affect preventing the too fast generation eddy current of tank base water port water outlet from causing air supporting environment.3, the utility model avoids by packing layer to improve purification efficiency, also just eliminates the shut-down brought because of packing layer blocking cleaned and changed, can realize steady in a long-term operation, and no-rotary part, use installation and maintenance to repair simple and easy.4, the utility model can adapt to the sewage disposal of large discharge, the simple batch avoiding small-sized model machine is in parallel, decreases land place or platform deck area occupied, and stronger to the adaptive faculty of water quality and quantity fluctuation change, there is higher turndown ratio, and rocking of liquid level can be adapted to.5, the utility model does not adopt expensive gas-liquid mixing pump, not only greatly reduces facility investment and operation expense, and avoids the negative impact that gas-liquid mixing pump brings sepn process the emulsification of oil-water mixture intensive shear.6, the utility model adopts closure, device, harmless treatment oily(waste)water, avoids the random discharge of obnoxious flavour, improves operating environment, improve safety performance, be conducive to the protection to environment.7, system adopts pressure oil extraction to remove enrichment oil phase and scum, eliminate and utilize external dynamic equipment, energy-saving effect is obvious, and process cost is low, also overcomes simultaneously and adopts gravity drainage to make tank interior complex structure, occupy the drawback of effective separate space in tank.The utility model can be widely used in the process of all kinds of oily(waste)water, be especially applicable to offshore oil and gas exploitation institute with recovered water remove oil purification.
Accompanying drawing explanation
Fig. 1 is the utility model one-piece construction schematic diagram;
Fig. 2 is the structural representation of the utility model tank body;
Fig. 3 is the schematic top plan view at the utility model tank body top;
Fig. 4 is that the A-A of Fig. 2 is to cross-sectional schematic;
Fig. 5 is that the B-B of Fig. 2 is to cross-sectional schematic;
Fig. 6 is the structural representation of the utility model urceolus and inner core; Wherein, Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) and Fig. 6 (d) give upper and lower end structure and the position relationship of four kinds of urceolus and inner core;
Fig. 7 is application schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1, the utility model comprises cyclone air-flotation assembled unit more than 20, that a tank body 10, is arranged on tank body 10 inside to be arranged on tank body 10 inner and be positioned at the gas-liquid mixed unit 40 that even distribution device below cyclone air-flotation assembled unit 20 30 and is arranged in tank body 10 outside.
As shown in figs. 2 to 4, tank body 10 of the present utility model is combined by the oval upper cover 102 of cylindrical shell 101, of a cylindrical shape and an oval lower cover 103, an inlet tube 104 is fastenedly connected at the sidewall of tank body 10, a Y-tube 105 is fastenedly connected in the bottom centre of tank body 10, a port of Y-tube 105 connects a water shoot 106, and another port connects a recirculation water pipeline 107.A collection tube 108 is fastenedly connected in the top center of tank body 10.
Cyclone air-flotation assembled unit 20 of the present utility model comprises the inner core 202 that a urceolus 201 and is coaxially arranged on urceolus 201 inside, wherein, and urceolus 201 and inner core 202 all open at both ends.The lower end edge circumference of urceolus 201 is provided with multiple journal stirrup 203, and each journal stirrup 203 is all connected with the inner wall tightening of tank body 10 by a circumference liner plate 204.Inner core 202 is fastenedly connected with urceolus 201 by multiple web plate 205 circumferentially arranged.Inlet tube 104 tangentially enters the annular space between urceolus 201 and inner core 202.
As shown in Figure 5, even distribution device 30 of the present utility model comprises a feed liquor supervisor 301 and is multiplely vertically connected on the Wire wound tube 302 that feed liquor is responsible for 301 both sides, and each Wire wound tube 302 is all responsible for 301 with feed liquor and is communicated with.
As shown in Figure 1, gas-liquid mixed unit 40 of the present utility model comprises two micro-bubble generators 401, and wherein the entrance end of a micro-bubble generator 401 connects an oily(waste)water inlet pipe, and exit end connects the inlet tube 104 be positioned on tank body 10 sidewall; The entrance end of another micro-bubble generator 401 connects recirculation water pipeline 107, and exit end connects the feed liquor supervisor 301 of even distribution device 30.
In above-described embodiment, a unhurried current plate 109 can be set between even distribution device 30 and the outlet at bottom of tank body 10.
In above-described embodiment, between micro-bubble generator 401 and inlet tube 104, be provided with flow meters 110; Collection tube 108 is provided with a valve 111 and flow meters 110; Water shoot 106 is provided with a valve 111 and flow meters 110; Recirculation water pipeline 107 is provided with a valve 111 and flow meters 110; Recirculation water pipeline 107 and oily(waste)water inlet pipe arrange a tensimeter 112 respectively; One tensimeter 112 and a safety valve 113 is set at the top of tank body 10; Tank body 10 is also provided with a liquidometer 114.
In above-described embodiment, taper can be arranged in the upper end of urceolus 201, and make the upper end open of urceolus 201 in the trend of inwardly shrinking, the oil being conducive to ordering about floating collects, thus is beneficial to collection tube 108 and utilizes pressure to be collected by oil to discharge.Fig. 6 gives several structures of urceolus 201 with inner core 202: upper end, the lower end of urceolus 201 shown in Fig. 6 (a) and inner core 202 all keep concordant; Shown in Fig. 6 (b), urceolus 201 is concordant with the lower end of inner core 202, and the cone structure of upper end exceeds the upper end of inner core 202; Urceolus 201 shown in Fig. 6 (c) is concordant with inner core 202 upper end, and inverted cone shape (inwardly contraction) is arranged in lower end, and lower than the lower end of inner core 202; Urceolus 201 shown in Fig. 6 (d) is concordant with inner core 202 upper end, and taper (expanding outwardly) is arranged in lower end, and lower than the lower end of inner core 202.
In above-described embodiment, as shown in Figure 2, a manhole 115 being convenient to keep in repair tank body 10 internal structure can be offered on the sidewall of tank body 10.
In above-described embodiment, urceolus 201 is 0.3 ~ 0.7 with the ratio of tank body 10 internal diameter; The ratio of the height of urceolus 201, inner core 202 and tank body 10 height is 0.25 ~ 0.4; The diameter of unhurried current plate 109 is 3 ~ 6 times of the outlet at bottom diameter of tank body 10; The position of unhurried current plate 109 is not higher than the top of lower cover 103; The wrap spacing of Wire wound tube 302 is not more than 0.25mm.
Use procedure of the present utility model is as follows:
First, oily(waste)water and gas are with certain pressure and flow velocity, volume proportion according to 8% ~ 25%, enter micro-bubble generator 401, gas with the form disperse of micro bubble in oily(waste)water, in the particle diameter of micro bubble and sewage, the particle diameter of disperse phase oil droplet is close, and then completes the abundant mixing process of gas-liquid." oily(waste)water+micro bubble " evenly gas-liquid mixture runs through by the inlet tube 104 be positioned on tank body 10 that to enter tank body 10 inner, because inlet tube 104 and urceolus 201 are tangent, so " oily(waste)water+micro bubble " even gas-liquid mixture tangentially enters the annular space between urceolus 201 and inner core 202, the cyclonic separation district that formation one is stable in this annular space.Comparatively light constituent is gradually to the migration of inner core 202 outer wall near zone for oil droplet, micro bubble etc., and heavy component is moved to urceolus 201 inwall near zone gradually.In this process, due to the density variation between oil droplet and micro-bubble, micro bubble travelling speed and ascent rate comparatively fast, thus make chance of the two contact increase, and by the two continuous making contact, adhesion, form oil droplet-micro bubble adherend.Part oil droplet, micro bubble, oil droplet-micro bubble adherend slowly will float along inner core 202 outer wall near zone; Heavier aqueous phase then flows downward along the inwall of urceolus 201, and after unhurried current plate 109 flows slowly, enter Y-tube 105 from tank body 10 pot bottom, afterwards, most of water outlet is flowed out by water shoot 106, and small portion water outlet enters recirculation water pipeline 107.In order to strengthen air-float segregation effect further, utilize another micro-bubble generator 401, in recirculation water, inject a large amount of micro bubble, then by the even distribution device 30 that is positioned at tank body 10 bottom by " recirculation water+micro bubble " evenly gas-liquid mixture be evenly distributed on the lower region of tank body 10.Part oil droplet and oil droplet-micro bubble adherend, under the effect of micro bubble entrained by recirculation water, float in inner core 202 bottom or the inner direction that changes.As a whole, in the micro bubble of disperse in oily(waste)water incoming flow and recirculation water, the micro bubble of disperse is that the realization of air supporting effect provides favourable condition, and each unit is worked in coordination and jointly completed cyclone air-flotation process.The operating parameters such as the backflow water yield, gas injection rate of cyclone air-flotation assembled unit 20 is entered by adjustment, can the very high isolation of purified efficiency of corresponding acquisition.Oil droplet-micro bubble adherend ullage in tank body 10 of two flotation separation zones forms " enrichment oil phase+bubble scum silica frost " compact district, and after part foam breaks, escaping gas enters the top gas phase space in tank body 10.Due to the airtight operation of whole cyclone air-flotation assembled unit 20, the pressure of tank body 10 inner top gas-phase space can rise gradually from normal pressure, " enrichment oil phase+bubble scum silica frost " is continuously discharged through collection tube 108 under pressure, is discharged in specific effluent oil recovery device by pipeline; Top foul gas then collects unified process discharge.Tank body 10 top adopts pressure oil extraction, makes when whole compact cyclone air-flotation separation system steady running, and the liquid level in tank body 10 also corresponding maintenance is stablized.Even by carrying out corresponding minute design in the design of collection tube 108 bottom oil extraction circulation area, the fluctuation even eliminating liquid level in tank body 10 can be suppressed further.
Although system described in the utility model can adapt to comparatively large discharge, but still according to the difference of the difference required treatment effect and working flow demand, can to adopt and the mode of multiple Cascade System described in the utility model or parallel connection carried out respective combination.Fig. 7 shows employing two system series/parallel mode of operation described in the utility model:
During series connection, water shoot 106 water outlet of previous described system is as the water inlet of next system, and the oil that collection tube 108 is discharged is pooled in same pipeline, and series system can improve the separating effect of cyclone air-flotation integration oil-containing sewage treatment system.
Time in parallel, two described systems independently carry out the purifying treatment of oily(waste)water separately, the oil that collection tube 108 is discharged and the water that water shoot 106 is discharged are pooled in same pipeline respectively, and parallel way can improve the large discharge adaptive faculty of cyclone air-flotation integration oil-containing sewage treatment system further.
The utility model is only described with above-described embodiment, and the structure of each parts, setting position and connection thereof all can change to some extent.On the basis of technical solutions of the utility model, all improvement of carrying out individual part according to the utility model principle or equivalents, all should not get rid of outside protection domain of the present utility model.
Claims (8)
1. an oil-containing sewage treatment system, is characterized in that: it comprise a tank body, be arranged on described tank interior cyclone air-flotation assembled unit, more than one be arranged on described tank interior and the even distribution device and be positioned at below described cyclone air-flotation assembled unit is arranged in the gas-liquid mixed unit of described tank body outside;
Be fastenedly connected an inlet tube at the sidewall of described tank body, be fastenedly connected a Y-tube in the bottom centre of described tank body, a port of described Y-tube connects a water shoot, and the another port of described Y-tube connects a recirculation water pipeline; A collection tube is fastenedly connected in the top center of described tank body;
Described cyclone air-flotation assembled unit comprises the inner core that a urceolus and is coaxially arranged on described outer barrel, described urceolus and the equal open at both ends of inner core; Described urceolus is connected with the inner wall tightening of described tank body by multiple circumference liner plate; Described inlet tube tangentially enters the annular gap between described urceolus and described inner core;
Described gas-liquid mixed unit comprises two micro-bubble generators, and wherein the entrance end of micro-bubble generator described in connects an oily(waste)water inlet pipe, and exit end connects the described inlet tube be positioned on described tank wall; The entrance end of micro-bubble generator described in another connects described recirculation water pipeline, and exit end connects described even distribution device.
2. oil-containing sewage treatment system as claimed in claim 1, is characterized in that: described even distribution device comprises a feed liquor supervisor and multiple Wire wound tube being vertically connected on described feed liquor supervisor both sides, and Wire wound tube described in each is all responsible for described feed liquor and is communicated with; Described feed liquor supervisor connects the exit end of micro-bubble generator described in another.
3. oil-containing sewage treatment system as claimed in claim 1 or 2, is characterized in that: between described even distribution device and the outlet at bottom of described tank body, arranging a unhurried current plate.
4. oil-containing sewage treatment system as claimed in claim 1 or 2, is characterized in that: between described micro-bubble generator and described inlet tube, be provided with flow meters; Described collection tube is provided with a valve and flow meters; Described water shoot is provided with a valve and flow meters; Described recirculation water pipeline is provided with a valve and flow meters; Described recirculation water pipeline and oily(waste)water inlet pipe arrange a tensimeter respectively; One tensimeter and a safety valve are set at the top of described tank body; Described tank body is also provided with a liquidometer.
5. oil-containing sewage treatment system as claimed in claim 1 or 2, is characterized in that: taper is arranged in the upper end of described urceolus.
6. oil-containing sewage treatment system as claimed in claim 5, is characterized in that: taper or inverted cone shape are arranged in the lower end of described urceolus.
7. oil-containing sewage treatment system as claimed in claim 1 or 2, is characterized in that: described tank body is combined by the cylindrical shell of a cylindrical shape, an oval upper cover and an oval lower cover.
8. oil-containing sewage treatment system as claimed in claim 1 or 2, is characterized in that: the sidewall of described tank body is provided with a manhole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520264823.5U CN204737754U (en) | 2015-04-28 | 2015-04-28 | Oily water treatment system |
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| CN201520264823.5U CN204737754U (en) | 2015-04-28 | 2015-04-28 | Oily water treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174365A (en) * | 2015-04-28 | 2015-12-23 | 中国海洋石油总公司 | Oily sewage treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174365A (en) * | 2015-04-28 | 2015-12-23 | 中国海洋石油总公司 | Oily sewage treatment system |
| CN105174365B (en) * | 2015-04-28 | 2018-01-16 | 中国海洋石油总公司 | A kind of oil-containing sewage treatment system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |
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| CP01 | Change in the name or title of a patent holder |