CN112676326B - Oil storage place normal position dialysis formula groundwater oils pollutes remove device - Google Patents
Oil storage place normal position dialysis formula groundwater oils pollutes remove device Download PDFInfo
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- CN112676326B CN112676326B CN202011635698.6A CN202011635698A CN112676326B CN 112676326 B CN112676326 B CN 112676326B CN 202011635698 A CN202011635698 A CN 202011635698A CN 112676326 B CN112676326 B CN 112676326B
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Abstract
The invention belongs to the technical field of sewage treatment, and particularly relates to an in-situ dialysis type underground water oil pollution removing device for an oil storage site, which comprises an air floating well system, wherein the air floating well system comprises an air floating well, the air floating well comprises a confluence well wall at the upstream side, an ultrafiltration function well wall at the downstream side and isolation well walls for sealing and connecting the confluence well wall and two sides of the ultrafiltration function well wall, the confluence well wall comprises a bentonite layer and a quartz sand layer positioned below the bentonite layer, the ultrafiltration function well wall comprises a fixed plate, a front support column and a rear support column are arranged at the lower end of the fixed plate, guide rails are arranged on the left side and the right side of the two support columns, the upper parts of the guide rails extend to the ground, and ultrafiltration membrane plates are arranged in the two guide rails oppositely arranged on the same side, the deep removal of the dissolved oil is realized, the removal range is wide, and the efficiency is high.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an in-situ dialysis type underground water oil pollution removing device for an oil storage site.
Background
Oil pollution and oil leakage events are frequent in oil storage and transportation sites such as gas stations and the like. By the end of 2018, the total number of gas stations in China reaches hundreds of thousands, and the leakage of gasoline and diesel causes direct pollution threat to surrounding soil and underground water. The detection rate of total petroleum hydrocarbon in an underground water sample of a gas station in Tianjin city investigated by the gas station seepage and leakage pollution prevention and control Standard in 2010 is 85%, so that a device and a technology capable of preventing and effectively controlling petroleum hydrocarbon pollution are urgently needed.
The underground water is underground undercurrent, the flow direction is relatively fixed, and the flow speed is relatively slow; the underground water pollution of the oil storage site has distinct characteristics: the pollutants are single in type and mainly gasoline diesel LNAPL; poor observability, if not removed in time, can present the risk of long-term accumulation, and along with the flow of groundwater influences downstream water quality. The hemodialysis operation of uremia patient is one method of introducing patient's blood into dialyzer for permeation exchange to separate out harmful ions and purify. Groundwater contamination has some similarities to uremic blood: all are undercurrents, all contain heterogeneous substances, and the removal components are single. Therefore, the method has great reference value by using the principles of hemodialysis, semipermeable membrane and the like in the process of removing petroleum hydrocarbon pollutants in underground water of an oil storage site.
The existing underground water petroleum hydrocarbon removal technology is mainly an in-situ repair technology such as a natural attenuation method, a permeable reactive barrier and an ex-situ repair technology, but the technologies have some defects, such as slow process of the natural attenuation method; the permeability reaction wall technology has weak pertinence to the treatment of oil pollutants, and the pores of the wall body are easy to block and need to be observed and managed for a long time; the ex-situ repair technology has the disadvantages of complicated operation, large energy consumption and the like. For example, CN202010783283.7 discloses a method for extracting contaminated groundwater, separating oil from water, injecting into a microbubble generator, dissolving more oxygen in the water, and injecting back into the groundwater layer to improve the biodegradation activity of microbes in the groundwater, but the water pumping and injection process is complicated, the energy consumption is large, and the oxygen supply changes the species system of microbes in the groundwater, so that the microbial indexes of the groundwater are abnormal. CN201420478060.X discloses an air floating well system for removing LNAPL in underground water in situ, which saves energy consumption and has strong environmental adaptability, but the problem of oil pollution is not thoroughly solved because dissolved oil and the like dissolved in underground water are not removed. CN201220308084.1 discloses a separator of reinjection ground water layer behind the oily sewage that handles the oil recovery through the milipore filter production, but the device more focuses on considering oil-water separation and the resupply of underground oil recovery cavity of oil recovery sewage, and lacks the design to groundwater, also lacks the automatic monitoring and the change device of milipore filter, and the treatment effect is difficult stably up to standard.
Disclosure of Invention
The invention provides an in-situ dialysis type underground water oil pollution removing device for an oil storage site.
In order to achieve the purpose, the invention adopts the following technical scheme:
an in-situ dialysis type underground water oil pollution removing device for an oil storage site comprises an air floating well system, a diaphragm pump system and an online automatic water quality monitoring system;
the air floating well system comprises an air floating well, the air floating well comprises a converging well wall on the upstream side, an ultrafiltration function well wall on the downstream side and an isolation well wall used for sealing and connecting the converging well wall and the two sides of the ultrafiltration function well wall, the converging well wall comprises a bentonite layer and a quartz sand layer positioned below the bentonite layer, the height of the bentonite layer is 20cm from the ground to the water surface, the height of the quartz sand layer is from the lower surface of the bentonite layer to the bottom of the air floating well, the ultrafiltration function well wall comprises a fixed plate from the ground to the water surface, a front support column and a rear support column are arranged at the lower end of the fixed plate, guide rails are arranged on the left side and the right side of the two support columns, the upper parts of the guide rails extend to the ground, ultrafiltration membrane plates are arranged in the two guide rails oppositely arranged on the same side, the upper ends of the ultrafiltration membrane plates are connected with one end of a connecting rope, and the other end of the connecting rope is wound on a winch, the water surface oil stain recovery device is characterized in that a water surface oil stain recovery mechanism is arranged in the air floatation well, one end of an oil pumping pipe is connected in a collection box in the water surface oil stain recovery mechanism, the other end of the oil pumping pipe is connected with an oil well pump on the ground, a sand bearing hopper is arranged at the bottom of the air floatation well, an aeration pipe which is coiled in a U shape is also arranged at the bottom of the air floatation well, one-way aeration valves are arranged on the aeration pipe at intervals of 10cm, and the air inlet end of the aeration pipe is connected with an aerator on the ground through a closed pipeline;
the diaphragm pump system comprises a diaphragm pump arranged on the ground, an air cavity of the diaphragm pump is connected with a pressure cavity in water through a well way, the pressure cavity is formed by connecting three sealing plates and an ultrafiltration functional well wall in pairs, the heights of the sealing plates are the same as that of the water level, a unidirectional flow door is hinged to the sealing plate on the right side, the unidirectional flow door is positioned on the lower portion of the sealing plate and can only be opened towards the right side, and a clamping plate is arranged below the unidirectional flow door to prevent the unidirectional flow door from turning to the left side;
a water taking unit in the online automatic water quality monitoring system is positioned on the right side of the closing plate, and the online automatic water quality monitoring system is used for periodically detecting water quality.
Further, a quartz sand wall is arranged on the right side of the closing plate in the diaphragm pump system in a surrounding mode and is used for further filtering the treated water.
And furthermore, an oil level sensor is arranged in the collecting box in the water surface oil stain recovery mechanism and used for monitoring the oil level in the collecting box.
Furthermore, a water level meter is arranged in the air floatation well and used for monitoring the water level in the air floatation well so as to control the starting and stopping of the diaphragm pump.
Furthermore, the fixed plate, the isolation well wall and the closing plate are all PVC plates.
Further, the ultrafiltration membrane plate is composed of a rectangular frame and an ultrafiltration membrane mounted on the rectangular frame.
Furthermore, a silica gel layer is arranged on the edge of the one-way flow door to enhance the sealing performance of the one-way flow door.
Compared with the prior art, the invention has the following advantages:
1. the invention uses the principle of hemodialysis for reference, purifies polluted underground water by the ultrafiltration membrane, realizes the deep removal of the dissolved oil, and has wide removal range and high efficiency;
2. according to the invention, the switch of the diaphragm pump can be controlled in an interlocking manner through the induction of the water level meter, when the water level rises to a certain value due to the fact that the number of pollutants in the ultrafiltration membrane is large and the membrane passing speed is reduced, the water level meter feeds back to the diaphragm pump to be started in time, the working efficiency and the repairing effect of the device are maintained, and the labor cost is saved;
3. when the diaphragm pump presses downwards and squeezes underground water, the repaired underground water is promoted to be discharged outwards and the backwashing of the ultrafiltration membrane is promoted, so that the self-cleaning of the ultrafiltration membrane is realized;
4. the invention does not use biological and chemical agent for restoration, has no possibility of secondary pollution, and can be applied to different regions and different sewage conditions;
5. the core component of the invention, namely the ultrafiltration membrane plate, is simple to assemble and can be automatically replaced, thereby prolonging the service life;
6. the invention is provided with a water quality on-line automatic monitoring system, can feed back the treatment effect and can judge the operation fault of the device by monitoring data.
Drawings
Figure 1 is a side view of the present invention,
FIG. 2 is a schematic structural diagram of the ultrafiltration well wall according to the present invention;
FIG. 3 is a top view of the gas floating well and pressure chamber and quartz sand wall of the present invention;
FIG. 4 is a schematic structural view of an ultrafiltration membrane plate according to the present invention;
in the figure, a confluence well wall-1, an ultrafiltration functional well wall-2, an isolation well wall-3, a bentonite layer-4, a quartz sand layer-5, a fixing plate-6, a support column-7, a guide rail-8, an ultrafiltration membrane plate-9, a connecting rope-10, a winch-11, a water surface oil stain recovery mechanism-12, an oil pumping pipe-13, an oil well pump-14, a sand bearing hopper-15, an aeration pipe-16, an aerator-17, a diaphragm pump-18, a well-way-19, a sealing plate-20, a one-way flow door-21, a water taking unit-22, a water level instrument-23, a one-way aeration valve-24, a quartz sand wall-25 and a clamping plate-26.
Detailed Description
In order to further illustrate the technical solution of the present invention, the present invention is further illustrated by the following examples.
As shown in fig. 1 to 4, an in-situ dialysis type groundwater oil pollution removing device for an oil storage site comprises an air floating well system, a diaphragm pump system and an online automatic water quality monitoring system;
the air floating well system comprises an air floating well, the air floating well comprises a confluence well wall 1 at the upstream side, an ultrafiltration function well wall 2 at the downstream side and an isolation well wall 3 for sealing and connecting the confluence well wall 1 and the two sides of the ultrafiltration function well wall 2, the confluence well wall 1 comprises a bentonite layer 4 and a quartz sand layer 5 positioned below the bentonite layer 4, the height of the bentonite layer 4 is 20cm from the ground to the water surface, the height of the quartz sand layer 5 is from the lower surface of the bentonite layer 4 to the bottom of the air floating well, the ultrafiltration function well wall 2 comprises a fixed plate 6 from the ground to the water surface, a front supporting column and a rear supporting column 7 are arranged at the lower end of the fixed plate 6, guide rails 8 are arranged at the left side and the right side of the two supporting columns 7, the upper parts of the guide rails 8 extend to the ground, and an ultrafiltration membrane plate 9 is arranged in the two guide rails 8 oppositely arranged at the same side, the upper end of the ultrafiltration membrane plate 9 is connected with one end of a connecting rope 10, the other end of the connecting rope 10 is wound on a winch 11, the ultrafiltration membrane plate 9 consists of a rectangular frame and an ultrafiltration membrane installed on the rectangular frame, a water surface oil stain recovery mechanism 12 is arranged in the air floatation well, one end of an oil pumping pipe 13 is connected in a collecting box in the water surface oil stain recovery mechanism 12, the other end of the oil pumping pipe 13 is connected with an oil well pump 14 on the ground, an oil level sensor is arranged in the collecting box in the water surface oil stain recovery mechanism 12 and used for monitoring the oil level in the collecting box, a sand bearing hopper 15 is arranged at the bottom of the air floatation well, an aeration pipe 16 which is coiled in a U shape is also arranged at the bottom of the air floatation well, one-way aeration valves 24 are installed on the aeration pipe 16 every 10cm, and the air inlet end of the aeration pipe 16 is connected with an aeration machine 17 on the ground through a closed pipeline, a water level meter 23 is arranged in the air floatation well and used for monitoring the water level in the air floatation well so as to control the start and stop of the diaphragm pump 18;
the diaphragm pump system comprises a diaphragm pump 18 arranged on the ground, an air cavity of the diaphragm pump 18 is connected with a pressure cavity in water through a well 19, the pressure cavity is formed by connecting three sealing plates 20 and an ultrafiltration well wall 2 in pairs, the height of each sealing plate 20 is the same as that of the water level, a one-way flow door 21 is hinged to the sealing plate 20 on the right side, the one-way flow door 21 is located on the lower portion of each sealing plate 20 and can only be opened towards the right side, a silica gel layer is arranged on the edge of each one-way flow door 21, a clamping plate 26 is arranged below each one-way flow door 21 to prevent the one-way flow door 21 from turning to the left side, a quartz sand wall 25 is arranged on the right side of each sealing plate 20 in the diaphragm pump system in a surrounding mode, and the fixing plate 6, the isolation well wall 3 and the sealing plates 20 are all PVC plates;
the water taking unit 22 in the water quality online automatic monitoring system is positioned on the right side of the closing plate 20, and the water quality online automatic monitoring system is used for periodically detecting water quality.
And carrying out geological and hydrological investigation and early-stage monitoring on the polluted area, collecting required data and determining the longitudinal and transverse dispersion distances of the underground water pollution plume. Determining parameters such as construction position and depth of the air floating well, and ensuring that the air floating well covers the whole area of the pollution plume.
The using method comprises the following steps: 1. air floatation process: the underground water is filtered by the quartz sand layer 5 and enters an air floating well, the one-way aeration valve 24 continuously generates micro bubbles to float oil mixed in the underground water to the surface of the underground water, and then impurities such as surface floating oil, bubble floating slag and the like are collected into a collecting box by the water surface oil stain recovery mechanism 12, and are subsequently pumped to the ground for pollutant treatment;
2. removing the dissolved oil:
2.1 after air floatation, oil substances in the underground water are greatly reduced, an ultrafiltration membrane filtering layer is clean at the initial stage, dissolved oil can be effectively prevented and collected, head loss is small, and a purified water body quickly passes through the ultrafiltration membrane;
2.2 along with the extension of the filtration time of the ultrafiltration membrane, the filtration membrane is blocked due to the enrichment of the dissolved oil, at the moment, the water level meter 23 displays that the water level rises, and when the rising speed is gradually increased, the increase of the substances attached to the ultrafiltration membrane is shown, the water passing speed is slow, the diaphragm pump 18 is automatically started after the underground water level reaches a certain threshold value, and the diaphragm pump 18 reciprocates to generate transmembrane power along with the diaphragm pump 18, namely when the diaphragm pump 18 moves upwards, the one-way flow door 21 is closed, a closed space is formed between the ultrafiltration well wall 2 and the one-way flow door 21, pumping pressure from the inside of the well to the outside of the well is generated on the ultrafiltration membrane, groundwater passes through the ultrafiltration membrane, water is dialyzed to the outside of the well, and the removal of the dissolved oil is completed; when the diaphragm moves downwards, the one-way flow door 21 is opened towards the downstream under the action of pressure, the underground water passage is opened, the water flows towards the downstream through the quartz sand wall 25, and meanwhile, a certain membrane backwashing force is generated to remove substances such as floating oil and the like adsorbed on the surface of the ultrafiltration membrane;
2.3 when the water level meter 23 shows that the water level is very high and does not have a trend of reduction, the blockage of the ultrafiltration membrane is serious, the head loss is high, the back washing of the diaphragm pump 18 cannot achieve the membrane cleaning effect, the water amount of the membrane passing through is rapidly reduced, at the moment, the winch 11 works, the ultrafiltration membrane plate 9 on the other side is put down, and the ultrafiltration membrane plate 9 on the other side is lifted at the same time, so that the uninterrupted removal effect is realized;
3. monitoring process of treatment effect: regularly collecting water samples at regular time, observing the change condition of the index value, if the index is deteriorated, starting the diaphragm pump 18 to be invalid, indicating that the ultrafiltration membrane is invalid, and replacing the ultrafiltration membrane plate 9; after replacement, the sealing performance of the ultrafiltration membrane plate 9 is checked again to ensure sealing.
While there have been shown and described what are at present considered to be the essential features and advantages of the invention, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides an oil storage place normal position dialysis formula groundwater oils pollutes remove device which characterized in that: comprises an air floating well system, a diaphragm pump system and an online automatic water quality monitoring system;
the air floating well system comprises an air floating well, the air floating well comprises a confluence well wall (1) at the upstream side, an ultrafiltration function well wall (2) at the downstream side and an isolation well wall (3) used for sealing and connecting the confluence well wall (1) and the two sides of the ultrafiltration function well wall (2), the confluence well wall (1) comprises a bentonite layer (4) and a quartz sand layer (5) positioned below the bentonite layer (4), the height of the bentonite layer (4) is 20cm from the ground to the water surface, the height of the quartz sand layer (5) is from the lower surface of the bentonite layer (4) to the bottom of the air floating well, the ultrafiltration function well wall (2) comprises a fixed plate (6) from the ground to the water surface, the lower end of the fixed plate (6) is provided with a front supporting column and a rear supporting column (7), the left side and the right side of the supporting column (7) are both provided with guide rails (8), and the upper part of the guide rails (8) extends to the ground, an ultrafiltration membrane plate (9) is arranged in the two guide rails (8) which are oppositely arranged on the same side, the upper end of the ultrafiltration membrane plate (9) is connected with one end of a connecting rope (10), the other end of the connecting rope (10) is wound on a windlass (11), a water surface oil stain recovery mechanism (12) is arranged in the air floatation well, one end of an oil pumping pipe (13) is connected in a collection box in the water surface oil stain recovery mechanism (12), the other end of the oil pumping pipe (13) is connected with an oil well pump (14) on the ground, a sand bearing hopper (15) is arranged at the bottom of the air floating well, an aeration pipe (16) which is coiled in a U shape is also arranged at the bottom of the air floating well, one-way aeration valves (24) are arranged on the aeration pipes (16) every 10cm, the air inlet end of the aeration pipe (16) is connected with an aerator (17) on the ground through a closed pipeline;
the diaphragm pump system comprises a diaphragm pump (18) arranged on the ground, an air cavity of the diaphragm pump (18) is connected with a pressure cavity in water through a well (19), the pressure cavity is formed by sequentially connecting three sealing plates (20) and an ultrafiltration functional well wall (2), the height of each sealing plate (20) is the same as that of the water level, a one-way flow door (21) is hinged to the sealing plate (20) on the right side, the one-way flow door (21) is located on the lower portion of the sealing plate (20) and can only be opened towards the right side, and a clamping plate (26) is arranged below the one-way flow door (21) to prevent the one-way flow door (21) from turning to the left side;
a water taking unit (22) in the online automatic water quality monitoring system is positioned on the right side of a closing plate (20), and the online automatic water quality monitoring system is used for periodically detecting water quality.
2. The in-situ dialysis type groundwater oil pollution removal device for the oil storage site as claimed in claim 1, wherein: in the diaphragm pump system, a quartz sand wall (25) is also arranged around the right side of the closing plate (20) for further filtering the treated water.
3. The in-situ dialysis type groundwater oil pollution removal device for the oil storage site as claimed in claim 1, wherein: an oil level sensor is arranged in a collecting box in the water surface oil stain recovery mechanism (12) and used for monitoring the oil level in the collecting box.
4. The in-situ dialysis type groundwater oil pollution removal device for the oil storage site as claimed in claim 1, wherein: and a water level meter (23) is arranged in the air floatation well and used for monitoring the water level in the air floatation well so as to control the start and stop of the diaphragm pump (18).
5. The in-situ dialysis type groundwater oil pollution removal device for the oil storage site as claimed in claim 1, wherein: the fixed plate (6), the isolation well wall (3) and the closing plate (20) are all PVC plates.
6. The in-situ dialysis type groundwater oil pollution removal device for the oil storage site as claimed in claim 1, wherein: the ultrafiltration membrane plate (9) consists of a rectangular frame and an ultrafiltration membrane arranged on the rectangular frame.
7. The in-situ dialysis type groundwater oil pollution removal device for the oil storage site as claimed in claim 1, wherein: and a silica gel layer is arranged on the edge of the one-way flow door (21) to enhance the sealing property of the one-way flow door (21).
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| CN202011635698.6A CN112676326B (en) | 2020-12-31 | 2020-12-31 | Oil storage place normal position dialysis formula groundwater oils pollutes remove device |
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| CN112676326B true CN112676326B (en) | 2021-11-19 |
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| US5605634A (en) * | 1994-04-23 | 1997-02-25 | University Of Waterloo | Treatment of contaminated groundwater |
| CN202490819U (en) * | 2012-02-21 | 2012-10-17 | 天津生态城环保有限公司 | In-situ remediation device for organic contaminated soil |
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| CN108147551A (en) * | 2017-12-13 | 2018-06-12 | 同济大学 | A kind of two-way blocking repair system in situ of phreatic water polluted by nitrogen migration |
| CN110282685A (en) * | 2019-06-24 | 2019-09-27 | 苏州市宏宇环境科技股份有限公司 | A kind of high purification efficiency ground water circulation well purification system |
| CN112142160A (en) * | 2020-09-07 | 2020-12-29 | 南京万德斯环保科技股份有限公司 | AS/MPE combined repairing system and method for underground water polluted by LNAPL |
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2020
- 2020-12-31 CN CN202011635698.6A patent/CN112676326B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5605634A (en) * | 1994-04-23 | 1997-02-25 | University Of Waterloo | Treatment of contaminated groundwater |
| CN202490819U (en) * | 2012-02-21 | 2012-10-17 | 天津生态城环保有限公司 | In-situ remediation device for organic contaminated soil |
| CN204080930U (en) * | 2014-08-22 | 2015-01-07 | 环境保护部环境规划院 | A kind of original position removes the air supporting well system of LNAPL in underground water |
| KR20160136741A (en) * | 2015-05-20 | 2016-11-30 | 한준수 | Constructing method and apparatus to construct suction pile from ground to underground or sea level |
| CN105964686A (en) * | 2016-07-25 | 2016-09-28 | 厦门嵩湖环保股份有限公司 | Sandbeach oil stain pollutant refining treatment system and method |
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