CN112390414A - Oily sewage treatment system for large and medium hydropower stations - Google Patents
Oily sewage treatment system for large and medium hydropower stations Download PDFInfo
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- CN112390414A CN112390414A CN202011271938.9A CN202011271938A CN112390414A CN 112390414 A CN112390414 A CN 112390414A CN 202011271938 A CN202011271938 A CN 202011271938A CN 112390414 A CN112390414 A CN 112390414A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses an oily sewage treatment system for large and medium hydropower stations, which comprises a grating well, an adjusting tank, a high-efficiency cyclone oil separator, a high-efficiency air flotation device, a high-efficiency oil-water separator, a mechanical filter, an activated carbon filter, a quartz sand filter and a sampling well, wherein the grating well is arranged on the left side of the adjusting tank. The invention has the advantages of mature treatment technology, reliable operation, less occupied area, full-automatic control by PLC, treatment scale of more than or equal to 60m3/h, safety, high efficiency, strong oil removing capability, good coagulation and precipitation effect of suspended matters, oil content of effluent of less than or equal to 1mg/L, suspended matters of effluent of less than or equal to 10mg/L, strong water capacity and water quality load impact resistance, compact structure, convenient construction, continuous and stable work, reliable operation, wide operation range, low operation and maintenance cost and the like, and can stably reach the first-class A standard of pollutant discharge Standard of urban sewage treatment plants (GB 18918 plus 2002).
Description
Technical Field
The invention belongs to the technical field of hydropower stations, and particularly relates to an oily sewage treatment system for large and medium hydropower stations.
Background
The wastewater discharged by the hydropower station mainly contains oily sewage, the main sources of oil pollutants are machine repair waste oil, oil leakage and the like of equipment such as unit bearings, and the drainage of a top cover (a water guide bearing) accounts for more than 95 percent. In the normal operation process of the large and medium hydroelectric generating set, the discharge flow of oily sewage is large (more than 60m 3/h), the oil content is extremely low (0.13-2.11 mg/L), but under the emergency situations such as oil leakage and oil leakage of the generating set, the oil content can instantly rise thousands to ten thousand times (1-5%), and the oily sewage can be directly discharged to a downstream river channel if the oily sewage cannot be effectively treated, so that the river channel pollution is caused;
at present, the treatment of oily sewage of large and medium hydropower stations faces large discharge flow, large change of pollutant concentration and is not easy to control, the domestic oily sewage treatment technology is mature in the industries of oil extraction, petrifaction and the like, but in the design, construction and operation management practices of the hydropower stations, the current situations of the treatment of the oily sewage are different, the treatment process flows selected by each unit are different, and the conventional rotary oil, air flotation and filtration process in the market is limited by the treatment capacity of a filtration treatment process unit and cannot effectively treat high-flow oily sewage at high speed, so a mature and reliable comprehensive treatment system for the oily sewage of the large and medium hydropower stations is urgently needed.
Disclosure of Invention
The invention aims to: the method aims to solve the problems that the conventional oil rotation, air floatation and filtration process in the market is limited by the treatment capacity of a filtration treatment process unit and cannot effectively treat large-flow oily sewage at high speed.
The technical scheme adopted by the invention is as follows: the utility model provides a large and medium-sized power station oily sewage treatment system, includes grille well, equalizing basin, high-efficient hydrocyclone separator, high-efficient air supporting device, high-efficient oil-water separator, mechanical filter, active carbon filter, quartz sand filter and sampling well, the grille well is established in the left side of equalizing basin, be equipped with surface water intake and bottom profit overflow discharge pipe in proper order on the middle pond of high-efficient air supporting device, the equalizing basin passes through one-level elevator pump and high-efficient hydrocyclone separator fixed connection, high-efficient hydrocyclone separator and high-efficient air supporting device fixed connection, high-efficient oil-water separator, mechanical filter, active carbon filter and quartz sand filter loop through pipeline fixed connection, all fixedly connected with dirty oil bath on high-efficient air supporting device, the surface water intake on the high-efficient air supporting device has the second grade elevator pump through hose connection, and meanwhile, an output end pipeline of the secondary lift pump is fixedly connected with the high-efficiency oil-water separator.
In a preferred embodiment, the high-efficiency air flotation device is divided into four sections, the high-efficiency air flotation device is sequentially a water distribution area, a contact tank, an air flotation tank and an intermediate water tank, an air outlet of the contact tank is connected with a dissolved air tank, and the dissolved air tank is fixedly connected with the intermediate water tank of the high-efficiency air flotation device through a reflux pump.
In a preferred embodiment, the surface water intake mainly comprises a buoy and a water inlet head, wherein the buoy and the water inlet head have relative height, and the water inlet head is fixedly connected with the secondary lift pump through a hose.
In a preferred embodiment, the bottom layer oil-free water overflow discharge pipe is designed into a tee joint with an upper opening and a lower opening, the upper opening of the bottom layer oil-free water overflow discharge pipe is located above the wall of the middle water pool by-cm, and the lower opening of the bottom layer oil-free water overflow discharge pipe is located above the bottom plate of the pool by cm.
In a preferred embodiment, a demulsification dosing device is fixedly connected to a side inlet of the high-efficiency cyclone oil separator, and a PAM dosing device is fixedly connected to a top outlet of the high-efficiency cyclone oil separator.
In a preferred embodiment, the other end of the bottom layer oil-free water overflow discharge pipe and the outlet of the quartz sand filter are connected to the sampling well.
In a preferred embodiment, the left side of the grid well is provided with an access pipe.
In a preferred embodiment, the dirty oil sump is a separate sump.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the oily sewage treatment system for large and medium hydropower stations has the advantages of mature treatment technology, reliable operation, small occupied area, full-automatic control by adopting PLC, treatment scale of more than or equal to 60m3/h, safety, high efficiency, strong oil removal capability, good coagulation and precipitation effects of suspended matters, effluent oil content of less than or equal to 1mg/L, effluent suspended matters of less than or equal to 10mg/L, strong water quantity and water quality load impact resistance, capability of stably meeting the first-class A standard of pollutant discharge Standard of municipal wastewater treatment plants (GB 18918-.
Drawings
FIG. 1 is a schematic connection diagram of an oily sewage treatment system of a large and medium hydropower station provided by the invention.
The labels in the figure are: 1. a grid well; 2. a regulating tank; 3. a primary lift pump; 4. a demulsifying and dosing device; 5. PAM dosing device; 6. a high-efficiency cyclone oil separator; 7. a high-efficiency air floatation device; 8. a surface water intake; 9. the bottom layer is provided with an oil-free water overflow discharge pipe; 10. a dissolved air tank; 11. a secondary lift pump; 12. a high-efficiency oil-water separator; 13. a mechanical filter; 14. an activated carbon filter; 15. a quartz sand filter; 16. a dirty oil pool; 17. and (5) sampling the well.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed; the type of the electrical appliance provided by the invention is only used for reference. For those skilled in the art, different types of electrical appliances with the same function can be replaced according to actual use conditions, and for those skilled in the art, the specific meaning of the above terms in the present invention can be understood in specific situations.
Referring to fig. 1, the oily sewage treatment system for the large and medium hydropower stations comprises a grid well 1, an adjusting tank 2, a high-efficiency cyclone separator 6, a high-efficiency air flotation device 7, a high-efficiency oil-water separator 12, a mechanical filter 13, an activated carbon filter 14, a quartz sand filter 15 and a sampling well 17, wherein the grid well 1 is arranged on the left side of the adjusting tank 2, a surface water intake 8 and a bottom layer oil-free water overflow discharge pipe 9 are sequentially arranged on a middle water tank of the high-efficiency air flotation device 7, the adjusting tank 2 is fixedly connected with the high-efficiency cyclone separator 6 through a primary lifting pump 3, the high-efficiency cyclone separator 6 is fixedly connected with the high-efficiency air flotation device 7, the high-efficiency oil-water separator 12, the mechanical filter 13, the activated carbon filter 14 and the quartz sand filter 15 are fixedly connected through pipelines, and simultaneously, dirty oil tanks 16 are fixedly connected on the high-, the surface water intake 8 on the high-efficient air supporting device 7 is connected with a second-stage lift pump 11 through a hose, and an output end pipeline of the second-stage lift pump 11 is fixedly connected with a high-efficient oil-water separator 12.
The efficient air flotation device 7 is divided into four sections, the efficient air flotation device 7 sequentially comprises a water distribution area, a contact tank, an air flotation tank and a middle water tank, an air outlet of the contact tank is connected with a dissolved air tank 10, and the dissolved air tank 10 is fixedly connected with the middle water tank of the efficient air flotation device 7 through a reflux pump; the surface water intake 8 mainly comprises a float bowl and a water inlet head, the relative height is arranged between the float bowl and the water inlet head, and the water inlet head is fixedly connected with the secondary lift pump 11 through a hose; the bottom layer oil-free water overflow discharge pipe 9 is designed into a tee joint which is fully opened up and down, the upper opening of the bottom layer oil-free water overflow discharge pipe 9 is 10-20 cm above the wall of the middle water pool, and the lower opening of the bottom layer oil-free water overflow discharge pipe is 20cm above the bottom plate of the middle water pool, so that the bottom layer oil-free water in the middle water pool can be ensured to overflow only when the water level of the middle water pool exceeds the high water level; the side inlet of the high-efficiency cyclone oil separator 6 is fixedly connected with a demulsification dosing device 4, and the top outlet of the high-efficiency cyclone oil separator 6 is fixedly connected with a PAM dosing device 5; the other end of the bottom layer oil-free water overflow discharge pipe 9 and the outlet of the quartz sand filter 15 are connected to a sampling well 17; an access pipe is arranged at the left side of the grating well 1; the dirty oil sump 16 is a separate sump.
When in use: the primary lifting pump 3 comprises submerged pumps 1#, 2#, 3# when the incoming water of the oily sewage is normal, the single pumps 1# and 2# are independently operated alternately, when a large amount of incoming water is burst and the water level of the adjusting tank 2 rapidly rises, the pumps 1#, 2# and 3# are started to operate simultaneously, the condition that the adjusting tank 2 does not overflow is ensured, and the specific automatic control conditions are as follows: when the water level of the adjusting tank 2 is above a low water level (not reaching a middle water level), the 1# and 2# single pumps alternately operate, when the water level reaches the middle water level, the 1# (or 2#) and 3# pumps simultaneously operate, when the water level reaches a high water level, the 1# (or 2#) pumps simultaneously operate, when the water level falls to the middle water level, the 1# (or 2#) pumps stop, when the water level falls below the low water level, the 1#, 2#, and 3# pumps completely stop, and under special conditions, the manual operation (in place) can be switched;
after the oily sewage is deoiled and precipitated by the high-efficiency cyclone separator 6, the high-efficiency air flotation device 7, the high-efficiency oil-water separator 12, the mechanical filter 13, the activated carbon filter 14 and the quartz sand filter 15, the oil content and suspended matters of the oily sewage are basically removed, in an intermediate water pool of the high-efficiency air flotation device 7, oil-containing water on the surface layer is extracted through a surface water intake 8 for subsequent advanced treatment, oil-free water on the bottom layer is subjected to overflow discharge through a bottom-layer oil-free water overflow discharge pipe 9, and according to operation practical experience, when the deeply treated surface water accounts for more than 15% of the total treated raw water (namely the deep treatment rate of the intermediate water pool is more than or equal to 15%), the operation stability and the water quality reliability;
when the second-stage lift pump 11 is above the low water level of the middle water tank, the 1# and 2# single pumps alternately run, when the water level reaches the high water level, the bottom layer oil-free water overflow discharge pipe 9 starts to work, oil-free water in the bottom layer of the middle water tank is discharged, if the system load is continuously reduced, the 1# and 2# single pumps stop completely when the water level of the middle water tank is reduced to below the low water level, and the manual operation (in situ) can be switched under special conditions;
tests prove that by using the oily sewage treatment system for the large and medium hydropower stations, the quality of the effluent of the oily sewage of the hydropower stations is stable, the situations of overflow, water leakage, water overflow or standard exceeding of water quality do not occur during the operation, the system effectively bears the impact of the oily sewage when accidents such as oil leakage of an oil return box and the like occur in the hydropower stations, the effect completely reaches the expectation, the reliability of oily sewage treatment of the hydropower stations is effectively improved, and the overhaul and maintenance cost is greatly reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a large and medium-sized power station oily sewage treatment system, includes grid well (1), equalizing basin (2), high-efficient cyclone separator (6), high-efficient air supporting device (7), high-efficient oil-water separator (12), mechanical filter (13), activated carbon filter (14), quartz sand filter (15) and sampling well (17), its characterized in that: the grid well (1) is arranged at the left side of the adjusting tank (2), a surface water intake (8) and a bottom layer oil-free water overflow discharge pipe (9) are sequentially arranged on a middle water tank of the high-efficiency air flotation device (7), the regulating reservoir (2) is fixedly connected with the high-efficiency cyclone oil separator (6) through a primary lift pump (3), the high-efficiency cyclone oil separator (6) is fixedly connected with a high-efficiency air floatation device (7), the high-efficiency oil-water separator (12), the mechanical filter (13), the activated carbon filter (14) and the quartz sand filter (15) are fixedly connected in sequence through pipelines, meanwhile, the high-efficiency air flotation device (7) and the high-efficiency oil-water separator (12) are both fixedly connected with a dirty oil pool (16), a surface water intake (8) on the high-efficiency air flotation device (7) is connected with a secondary lift pump (11) through a hose, meanwhile, an output end pipeline of the secondary lift pump (11) is fixedly connected with the high-efficiency oil-water separator (12).
2. The oily sewage treatment system of the large and medium hydropower station according to claim 1, wherein the system comprises: high-efficient air supporting device (7) divide into the four sections, high-efficient air supporting device (7) are joining in marriage water zone, contact tank, air supporting pond and middle pond in proper order, and the contact tank gas outlet is connected with simultaneously and dissolves gas pitcher (10), it passes through backwash pump and high-efficient air supporting device (7) middle pond fixed connection to dissolve gas pitcher (10).
3. The oily sewage treatment system of the large and medium hydropower station according to claim 1, wherein the system comprises: the surface water intake (8) mainly comprises a float bowl and a water inlet head, the relative height is arranged between the float bowl and the water inlet head, and the water inlet head is fixedly connected with a secondary lift pump (11) through a hose.
4. The oily sewage treatment system of the large and medium hydropower station as claimed in claim 2, wherein: the bottom layer oil-free water overflow discharge pipe (9) is designed to be a tee joint which is opened up and down, the upper opening of the bottom layer oil-free water overflow discharge pipe (9) is 10-20 cm above the wall of the middle water pool, and the lower opening of the bottom layer oil-free water overflow discharge pipe is 20cm above the bottom plate of the water pool.
5. The oily sewage treatment system of the large and medium hydropower station according to claim 1, wherein the system comprises: the side inlet of the high-efficiency cyclone oil separator (6) is fixedly connected with a demulsification dosing device (4), and the top outlet of the high-efficiency cyclone oil separator (6) is fixedly connected with a PAM dosing device (5).
6. The oily sewage treatment system of the large and medium hydropower station according to claim 1, wherein the system comprises: the other end of the bottom layer oil-free water overflow discharge pipe (9) and the outlet of the quartz sand filter (15) are connected to the sampling well (17).
7. The oily sewage treatment system of the large and medium hydropower station according to claim 1, wherein the system comprises: an access pipe is arranged on the left side of the grating well (1).
8. The oily sewage treatment system of the large and medium hydropower station according to claim 1, wherein the system comprises: the dirty oil pool (16) is an independent pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011271938.9A CN112390414A (en) | 2020-11-13 | 2020-11-13 | Oily sewage treatment system for large and medium hydropower stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011271938.9A CN112390414A (en) | 2020-11-13 | 2020-11-13 | Oily sewage treatment system for large and medium hydropower stations |
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| CN112390414A true CN112390414A (en) | 2021-02-23 |
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| CN202011271938.9A Pending CN112390414A (en) | 2020-11-13 | 2020-11-13 | Oily sewage treatment system for large and medium hydropower stations |
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Citations (6)
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| 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 |
| WO2011121619A1 (en) * | 2010-03-29 | 2011-10-06 | Abb S.P.A. | Water treatment process for oil and gas fields produced water |
| CN102583615A (en) * | 2012-02-09 | 2012-07-18 | 辽宁华孚环境工程有限公司 | Method modifying horizontal flow sedimentation tank into sedimentation floatation tank and modified sedimentation floatation tank |
| CN202529885U (en) * | 2012-05-03 | 2012-11-14 | 北京建工金源环保发展有限公司 | Unattended floatation tank water draining control device |
| CN202688038U (en) * | 2012-07-03 | 2013-01-23 | 杨志江 | Air floatation type automatic oil scraping and separating device |
| CN203976538U (en) * | 2014-07-25 | 2014-12-03 | 天津邦盛净化设备有限公司 | Die casing for automobile Cleaning Wastewater treatment unit |
-
2020
- 2020-11-13 CN CN202011271938.9A patent/CN112390414A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011121619A1 (en) * | 2010-03-29 | 2011-10-06 | Abb S.P.A. | Water treatment process for oil and gas fields produced water |
| 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 |
| CN102583615A (en) * | 2012-02-09 | 2012-07-18 | 辽宁华孚环境工程有限公司 | Method modifying horizontal flow sedimentation tank into sedimentation floatation tank and modified sedimentation floatation tank |
| CN202529885U (en) * | 2012-05-03 | 2012-11-14 | 北京建工金源环保发展有限公司 | Unattended floatation tank water draining control device |
| CN202688038U (en) * | 2012-07-03 | 2013-01-23 | 杨志江 | Air floatation type automatic oil scraping and separating device |
| CN203976538U (en) * | 2014-07-25 | 2014-12-03 | 天津邦盛净化设备有限公司 | Die casing for automobile Cleaning Wastewater treatment unit |
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Application publication date: 20210223 |