CN211437452U - Multiphase extraction well system - Google Patents
Multiphase extraction well system Download PDFInfo
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- CN211437452U CN211437452U CN201922156006.9U CN201922156006U CN211437452U CN 211437452 U CN211437452 U CN 211437452U CN 201922156006 U CN201922156006 U CN 201922156006U CN 211437452 U CN211437452 U CN 211437452U
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Abstract
The utility model relates to a multiphase extraction well system, which comprises an extraction well pipe, a back washing device, an automatic cleaning device, a screen box and an outer screen; the lower end of the extraction well pipe is provided with a sieve pipe with sieve gaps, and a gas phase extraction pipe and a liquid phase extraction pipe are arranged in the extraction well pipe; the back flushing device comprises a back flushing pipe arranged in the extraction well pipe; the automatic cleaning device is arranged between the extraction well pipe and the screen box and comprises a pipeline brush moving up and down; the surface of the screen box is attached with a biological film layer, and the inside of the screen box is filled with a packing layer; the screen box is characterized in that an outer screen is arranged outside the screen box body, a screen vibrator is arranged on the outer screen, and the screen vibrator is controlled to vibrate by a vibration controller. The utility model is simple in operation, adaptability are strong, can carry out the screen cloth simultaneously and clean at the extraction in-process, make and extract well casing and screen cloth clean unblocked.
Description
Technical Field
The utility model belongs to the technical field of the polyphase extraction restoration in the contaminated site normal position, a polyphase extraction well system for controlling the soil pollution in the site is provided.
Background
Along with the development of the economy of China and the continuous optimization and adjustment of industrial structures, a large number of polluted enterprises are moved or eliminated, a large amount of polluted soil and underground water are left, serious environmental safety hidden dangers exist, particularly, polluted sites such as petroleum, chemical industry and pesticides are easy to cause pollutant diffusion due to the fact that pollutants of the polluted sites have high volatility, the health of people is threatened, and a green sustainable repair and treatment technology is urgently needed. The in-situ remediation technology is widely applied to treatment and remediation of domestic and foreign polluted sites, is a main soil remediation technology, and compared with the ex-situ remediation technology, the in-situ remediation technology directly acts above a polluted area, and has the advantages of small soil disturbance effect, simplicity in operation, low energy consumption and the like.
Multi-phase extraction (MPE) is an important in-situ remediation technology, and can simultaneously perform remediation treatment on contaminated soil and underground water. The multiphase extraction technology comprises three main parts, namely multiphase extraction, multiphase separation and pollutant treatment, and is one of the main technologies for repairing volatile organic compound polluted soil and underground water at home and abroad. The multiphase extraction is the core part of the multiphase extraction technology, an extraction well is constructed in situ above a polluted area, and pollutants in different forms in soil and underground water, including liquid underground water, non-aqueous phase liquid (NAPL) and volatile organic compounds existing in a gas phase form in an unsaturated soil layer, are removed by extraction well system extraction. The most prominent characteristic of the multiphase extraction technology is that the underground pollutants are transferred to the ground surface for treatment by a vacuum extraction mode, so that the pollutants are removed in a green way. Compared with the traditional restoration technology, the multiphase extraction technology has the advantages of convenient operation, green cleanness, no damage to the soil structure and the like, but because the extraction pipe is directly contacted with the soil, the strong negative pressure airflow generated in the extraction process drives large soil particles to move, the silt blockage problem is easily caused, and the extraction efficiency and the restoration effect are influenced. The problem of extraction well blockage is solved, the probability of extraction well blockage is reduced, the service life of an extraction well system is prolonged, and the method has important significance for improving the soil and underground water remediation efficiency and ensuring the sustainable operation of the remediation system.
At present, the practice research on the anti-clogging of the extraction well is less aiming at the multi-phase extraction in China, the equipment and the method for cleaning the extraction well and preventing the clogging are less, the utility model is only provided with application number 201910467566.8, the name is the utility model patent of the extraction well system with the anti-clogging function applied to the multi-phase extraction of the soil, the extraction well system with the anti-clogging function applied to the multi-phase extraction of the soil is provided, the equipment and the operation cost are low, the technology is mature, and the anti-clogging function is realized to a certain extent. However, the anti-clogging function is mainly passive, and the cleaning can not be automated, and the cleaning operation is complicated, and only excavation cleaning can be performed after clogging occurs. Therefore, it is necessary to further improve the anti-clogging function of the existing extraction well, so that the existing extraction well can realize automatic cleaning treatment, thereby adapting to more severe environment and improving the operation stability of the multiphase extraction system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a heterogeneous well system of extracting for place soil pollution administers, the emergence of the jam is reduced to the at utmost, realizes extracting the clean automation of well, guarantees the steady operation of heterogeneous system of extracting.
The technical scheme of the utility model:
a multiphase extraction well system comprises an extraction well pipe, a backwashing device, an automatic cleaning device, a screen box and an outer screen;
the lower end of the extraction well pipe is provided with a sieve pipe with sieve gaps, a gas phase extraction pipe and a liquid phase extraction pipe are arranged in the extraction well pipe, and the gas phase extraction pipe and the liquid phase extraction pipe are respectively connected with a power device;
the back flushing device comprises a back flushing pipe arranged in the extraction well pipe, and one end of the back flushing pipe is connected with a pressurizing device;
the automatic cleaning device is arranged between the extraction well pipe and the screen box and comprises a pipeline brush moving up and down, and the pipeline brush is controlled by the control device to move up and down along the outside of the extraction well pipe;
the surface of the screen box is attached with a biomembrane layer, the inside of the screen box is filled with a filler layer, and the screen box is fixed in a clamping groove at the bottom of an extraction well pipe arranged at the bottom of the extraction well pipe;
the screen box is characterized in that an outer screen is arranged outside the screen box body, a screen vibrator is arranged on the outer screen, and the screen vibrator is controlled to vibrate by a vibration controller.
Preferably, the power device is a vacuum pump and a submersible pump, one end of the gas-phase extraction pipe is arranged in the extraction well pipe, and the other end of the gas-phase extraction pipe is connected with the vacuum pump; one end of the liquid phase extraction pipe is arranged in the extraction well pipe, the bottom of the liquid phase extraction pipe is connected with a submersible pump, and the other end of the liquid phase extraction pipe is connected with a separation system; a gas flowmeter is arranged on the gas phase extraction pipe; and a liquid flow meter is arranged on the liquid phase extraction pipe.
Preferably, the extraction well pipe is a whole-section UPVC well pipe with a closed bottom.
Preferably, the pressurizing device is a pressurizing pump, the backwash pipe is a flexible backwash pipe, and one end of the backwash pipe mounted inside the extraction well pipe is located below the liquid level.
Preferably, the outer wall of the extraction well pipe is provided with a pulley track, the pipeline brush is arranged on a pulley, and the pulley is arranged in the pulley track.
Preferably, a fixed pulley is fixed on the clamping groove at the bottom of the extraction well pipe, the pipeline brush is respectively connected with one end of a lifting rope and one end of a descending rope, the other end of the lifting rope is connected with a control device, the other end of the descending rope is connected with the control device through the fixed pulley, and the control device is a PA200 miniature electric winch.
Preferably, the screen box is composed of a stainless steel screen with screen gaps of 0.5-1.5 mm, and the distance between the cleaning device and the top of the screen box is 500-600 mm from the ground; the screen box comprises an upper layer screen box body and a lower layer screen box body, the lower layer screen box body is fixed in a clamping groove at the bottom of the extraction well pipe, and the upper layer screen box body is fixed in a screen box groove arranged at the top of the lower layer screen box body; and the inside of the screen box is sequentially filled with plain filling soil, bentonite and a filler layer of fine sand from top to bottom.
Preferably, the outer screen is formed by a frame screen with a screen gap of 1.5-2.5 mm, the screen vibrator is a CZ-10 bin wall vibrator, and silica gel sealing plugs are arranged on the top of the outer screen and the top of the screen box.
Preferably, 300-500 mm sand settling sections are arranged between the outer screen and the screen box, between the screen box and the extraction well pipe and in the extraction well pipe.
A multiphase extraction well system installation and cleaning disposal method adopts an inside-out mode for installation, and specifically comprises the following steps:
step 1, firstly, installing a backwash pipe in an extraction well pipe, connecting the other end of the backwash pipe with a pressure pump, installing a pipeline brush on the outer wall of an assembled extraction well pipe, and adopting two semicircular pipeline brushes to be assembled and installed;
step 4, the screen mesh boxes are arranged on the outer sides of the pipeline brushes and fixed through clamping grooves in the bottom of the extraction well pipe arranged at the bottom of the extraction well pipe, and the screen mesh box on the upper layer is fixed in the screen mesh box clamping groove in the top of the screen mesh box on the lower layer;
and 8, when the gas flowmeter and the liquid flowmeter are not stably operated, the gas flowmeter is lowered by more than 4m3H (30% left and right), the liquid flow meter is lowered by 0.075m3When the pressure is higher than 25%, starting a control device connected with a pipeline brush to drive the pipeline brush to clean the sieve tube and the sieve mesh of the sieve box, starting a sieve mesh vibrator to vibrate the sieve mesh to enable soil particles to fall off, stopping extraction when a gas flowmeter and a liquid flowmeter continuously descend, starting a backwashing device, and cleaning the part of the sieve mesh below the liquid level by using the backwashing device;
step 9, when the cleaning effect of the automatic cleaning device is not obvious, excavating soil above the extraction well, extracting the sieve net boxes filled with the filler layer by layer, and updating and replacing the sieve net boxes;
and step 10, after the replacement is finished, installing the screen mesh box and the silica gel sealing plug, sealing, backfilling soil, and finishing the cleaning treatment of the extraction well.
Compared with the prior art, the utility model discloses the advantage does:
the utility model is provided with the back washing device, and the liquid in the back washing pipe can effectively clean the screen pipe blocked under the liquid level under the power action of the pressure pump;
the utility model discloses set up the self-cleaning facility, through the pulley gear of installing on the pipeline wall and set up in the controlling means on ground, further be convenient for reciprocating of pipeline brush, through with the screen vibrator synergistic action, realize the automatic clear of pipeline jam silt, its processing is convenient, easy operation, adaptability are strong, can carry out the screen cloth simultaneously clean in the extraction process, make extraction well casing and screen cloth clean unblocked, guarantee the steady operation of heterogeneous extraction system, thereby guarantee the restoration effect of soil and groundwater;
the utility model solves the problem that the packing layer is difficult to be replaced after the blockage occurs by arranging the modularized layered packing screen box structure, and is convenient for the clean replacement of the packing layer;
the utility model effectively decomposes the pollutants attached to the filler by arranging the biological film layer on the surface of the screen box, and promotes the decomposition and extraction of the pollutants when the extraction efficiency is reduced in the later stage of extraction;
the utility model discloses a set up multiple-layer filtering screen mesh layer and sand setting section, delay the probability that the jam takes place, prolong the life cycle of extracting the well.
Drawings
Fig. 1 is a schematic structural view of an anti-clogging extraction well system according to an embodiment of the present invention;
FIG. 2 is a schematic view of the cleaning device of the present invention;
fig. 3 is a schematic structural view of the vibrating screen device of the present invention.
In the figure: 1. extracting a well pipe; 2. a gas phase extraction tube; 3. a vacuum pump; 4. a liquid phase extraction tube; 5. a submersible pump; 6. a screen pipe; 7. a silica gel sealing plug; 8. a pipeline brush; 9. a pulley; 10. a pulley track; 11. a fixed pulley; 12. a lowering line; 13. a lift cord; 14. a control device; 15. extracting a clamping groove at the bottom of the well pipe; 16. a screen box; 17. a screen cage slot; 18. plain filling; 19. bentonite; 20. fine sand; 21. an outer screen; 22. a sand setting section; 23. a gas flow meter; 24. a liquid flow meter; 25. a screen vibrator; 26. a vibration controller; 27. a pressure pump; 28 back flushing the tube.
Detailed Description
For clearly explaining the objects, technical solutions and advantages of the embodiments of the present invention, the embodiments will be clearly and completely described with reference to the accompanying drawings.
As shown in fig. 1, fig. 2 and fig. 3, the utility model provides a soil multiphase extraction well system with prevent blockking up, clean function includes: the device comprises an extraction well pipe 1, a gas phase extraction pipe 2, a vacuum pump 3, a liquid phase extraction pipe 4, a submersible pump 5, a sieve pipe 6, a silica gel sealing plug 7, a pipeline brush 8, a small pulley 9, a pulley track 10, a fixed pulley 11, a descending rope 12, a lifting rope 13, a control device 14, an extraction well pipe bottom clamping groove 15, a sieve box 16, a sieve box clamping groove 17, plain filling soil 18, bentonite 19, fine sand 20, an outer sieve 21, a sand setting section 22, a gas flowmeter 23, a liquid flowmeter 24, a sieve vibrator 25, a vibration controller 26, a pressure pump 27 and a backwashing pipe 28. The control device is a PA200 micro electric winch. The screen vibrator 25 is a CZ-10 silo wall vibrator.
The utility model discloses an extract well casing 1 for bottom confined one whole section UPVC well casing, the lower extreme is the screen pipe 6 that has the screen joint, and 2 one ends of gas phase extraction pipe are connected and are extracted well casing 1, and vacuum pump 3 is connected to the other end, and 4 one ends of liquid phase extraction pipe are connected and are located the immersible pump 5 of extracting 1 inside of well casing, and the piece-rate system is connected to the other end, installs gas flowmeter 23 and liquid flowmeter 24 on gas phase extraction pipe 2 and the liquid phase extraction pipe 4 respectively. The extraction power is provided by a vacuum pump 3 and a submersible pump 5.
The utility model discloses a back flush unit is including installing in the inside backwash pipe 28 of extraction well casing 1 and the force (forcing) pump 27 of connection, and backwash pipe 28 is located below the liquid level, through the power that force (forcing) pump 27 provided, washes liquid level screen pipe 6.
The utility model discloses a cleaning device includes controlling means 14 and pipeline brush 8, and pulley 9 is installed on pipeline brush 8 to place in 1 pipe wall pulley track 10 of extraction well casing, pipeline brush 8 and controlling means 14 link to each other with descent rope 12 and lifting rope 13 respectively, and descent rope 12 links to each other with controlling means through being fixed in fixed pulley 11 on extracting well casing bottom draw-in groove 15. When the pipeline cleaning device is used, power is transmitted to the descending rope 12 and the lifting rope 13 through the control device 14, and the pipeline brush 8 is driven to clean up and down through the movement of the ropes, so that silt falls into the silt settling section 22 preset at the lower end. The part of the descending rope 12 and the lifting rope 13 above the silica gel sealing plug 7 is positioned in the rubber tube, so that the system is in a closed state.
The utility model discloses extract 1 outside settings of well casing pipe brush 8, pipe brush 8 is located and extracts well casing 1 and 16 middle, and soil particles causes the difficult problem of extracting the well jam when can effectively solving heterogeneous extraction.
The utility model discloses a setting is filled the filler by the sieve box 16 that the screen cloth constitutes, and the sieve box is two-layer about by and is constituteed, and upper screen box is fixed in lower floor's sieve box draw-in groove 17, and sieve box 16 surface is with the biofilm layer, and inside stuffy filler fills out the packing layer of soil 18, bentonite 19 and fine sand 20 in proper order, and on sieve box bottom was fixed in extraction well casing bottom draw-in groove 15, the sieve box outside set up outer screen cloth 21, outer screen cloth 21 and sieve box 16 top installation silica gel sealing plug 7, keep extracting the seal of system.
The utility model discloses an installation screen cloth vibrator 25 on outer screen cloth 21 links to each other with ground vibration controller 26 and constitutes the shale shaker device, and screen cloth vibrator 26 shale shaker makes adnexed soil particle drop.
The following will further describe the cleaning and disposing method of the anti-blocking extraction well provided by the present invention with reference to the embodiment of applying the method to the repair of the old factory area of a certain petrochemical company in 5 months in 2019.
The soil and underground water of the plant area are mainly polluted by organic matters such as petroleum, benzene, ethylbenzene and the like, the underground water is buried deep by 7-14 m, and the aquifer comprises soil-containing gravel with the thickness of 2-4 m.
When the multiphase extraction system operates, gas and underground water in soil pass through an outer screen 21 with a screen gap of 1.5-2.5 mm under the power of a vacuum pump 3 and a submersible pump 5 to screen out soil particles with the particle size of more than 2.5mm, pass through a screen box 16 packing layer consisting of 0.5-1.5 mm screens again to further screen out the soil particles with the particle size of more than 1.5mm, and finally pass through a screen pipe 6 with a screen gap of less than 0.5 mm. The large soil particles intercepted by the screen mesh sink down into the preset bottom sand settling section 22 by gravity. The cleaning device and the screen vibrator are started periodically to remove soil particles attached to the screen and the sieve tube 6, so that the stable operation of the system is ensured.
The utility model discloses well gas flowmeter 23 and liquid flowmeter 24 are used for monitoring the running state of extracting the well, and when gas flowmeter 23 and liquid flowmeter 24 descending amplitude were big or the running state is unstable, cleaning device and screen cloth vibrator 25 were opened, stopped to extract when necessary, utilized back flush unit washing screen pipe 6. When the cleaning effect is not obvious, the screen box 16 is lifted out integrally, the filler in the screen box is replaced, and thorough cleaning is carried out, so that the stable operation of the multiphase extraction system is ensured.
The utility model also provides an anti-clogging extraction well installation and clean processing method, adopts the mode from inside to outside to install, specifically includes following steps:
step 1, firstly, installing a backwash pipe 28 in an extraction well pipe 1, connecting the other end of the backwash pipe 28 with a pressure pump 27, installing a pipeline brush 8 on the outer wall of the assembled extraction well pipe 1, and adopting two semicircular pipeline brushes 1 to be assembled and installed;
step 4, the screen box 16 is arranged outside the pipeline brush 8 and is fixed through a draw-in groove 15 at the bottom of the extraction well pipe arranged at the bottom of the extraction well pipe 1, and the screen box at the upper layer is fixed in a screen box draw-in groove 17 at the top of the screen box at the lower layer;
step 9, when the cleaning effect of the automatic cleaning device is not obvious, excavating soil above the extraction well, extracting the screen boxes 16 filled with the filler layer by layer, and updating and replacing the screen boxes;
and step 10, after the replacement is finished, installing the screen box 16 and the silica gel sealing plug 7, sealing, backfilling soil, and finishing the cleaning treatment of the extraction well.
Claims (9)
1. A multiphase extraction well system is characterized by comprising an extraction well pipe (1), a backwashing device, an automatic cleaning device, a screen box (16) and an outer screen (21);
the lower end of the extraction well pipe (1) is provided with a sieve tube (6) with sieve slits, a gas phase extraction pipe (2) and a liquid phase extraction pipe (4) are arranged in the extraction well pipe (1), and the gas phase extraction pipe (2) and the liquid phase extraction pipe (4) are respectively connected with a power device;
the back flushing device comprises a back flushing pipe (28) arranged in the extraction well pipe (1), and one end of the back flushing pipe (28) is connected with a pressurizing device;
the automatic cleaning device is arranged between the extraction well pipe (1) and the screen box (16), the automatic cleaning device comprises a pipeline brush (8) moving up and down, and the pipeline brush (8) is controlled by a control device (14) to move up and down along the outside of the extraction well pipe (1);
the surface of the screen box (16) is attached with a biomembrane layer, the interior of the screen box is filled with a filler layer, and the screen box (16) is fixed in a clamping groove (15) at the bottom of an extraction well pipe arranged at the bottom of the extraction well pipe;
the screen box (16) outside is provided with an outer screen cloth (21) of an external layer, install screen cloth vibrator (25) on outer screen cloth (21), screen cloth vibrator (25) are by vibration controller (26) control vibration.
2. A multiphase extraction well system according to claim 1, characterized in that the power device is a vacuum pump (3) and a submersible pump (5), one end of the gas phase extraction pipe (2) is arranged in the extraction well pipe, and the other end is connected with the vacuum pump (3); one end of the liquid phase extraction pipe (4) is arranged in the extraction well pipe, the bottom of the liquid phase extraction pipe is connected with a submersible pump (5), and the other end of the liquid phase extraction pipe is connected with a separation system; a gas flowmeter (23) is arranged on the gas phase extraction pipe (2); and a liquid flowmeter (24) is arranged on the liquid phase extraction pipe (4).
3. A multiphase extraction well system according to claim 1, characterized in that the extraction well pipe (1) is a one-piece UPVC well pipe closed at the bottom.
4. A multiphase extraction well system according to claim 1, characterized in that the pressurizing means is a pressurizing pump (27), the backwash pipe (28) is a telescopic backwash pipe, and the end of the backwash pipe (28) mounted inside the extraction well pipe (1) is below the liquid level.
5. A multiphase extraction well system according to claim 1, characterized in that the outer wall of the extraction well pipe (1) is provided with a pulley track (10), that the pipe brushes (8) are mounted on pulleys (9), and that the pulleys (9) are arranged in the pulley track (10).
6. A multiphase extraction well system according to claim 5, characterized in that a fixed pulley (11) is fixed on the bottom clamping groove (15) of the extraction well pipe, the pipe brush (8) is connected with one end of a lifting rope (13) and one end of a descending rope (12) respectively, the other end of the lifting rope (13) is connected with a control device (14), and the other end of the descending rope (12) is connected with the control device (14) through the fixed pulley (11).
7. The multiphase extraction well system according to claim 1, wherein the screen box (16) is made of a stainless steel screen with screen slots of 0.5-1.5 mm, and the top of the cleaning device and the screen box (16) is 500-600 mm away from the ground; the screen box (16) comprises an upper layer screen box body and a lower layer screen box body, the lower layer screen box body is fixed in a clamping groove (15) at the bottom of the extraction well pipe, and the upper layer screen box body is fixed in a screen box groove (17) arranged at the top of the lower layer screen box body; and the inside of the screen box (16) is sequentially filled with plain filling soil (18), bentonite (19) and a filler layer of fine sand (20) from top to bottom.
8. The multiphase extraction well system according to claim 1, wherein the outer screen (21) is a frame screen with a screen slot of 1.5-2.5 mm, the screen vibrator (25) is a CZ-10 bin wall vibrator, and a silicone sealing plug (7) is arranged on the top of the outer screen (21) and the screen box (16).
9. The multiphase extraction well system according to claim 1, wherein 300-500 mm sand settling sections (22) are arranged between the outer screen (21) and the screen box (16), between the screen box (16) and the extraction well pipe (1) and in the extraction well pipe (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922156006.9U CN211437452U (en) | 2019-12-05 | 2019-12-05 | Multiphase extraction well system |
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| CN201922156006.9U CN211437452U (en) | 2019-12-05 | 2019-12-05 | Multiphase extraction well system |
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| CN211437452U true CN211437452U (en) | 2020-09-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961444A (en) * | 2019-12-05 | 2020-04-07 | 煜环环境科技有限公司 | Multiphase extraction well system and installation and clean disposal method thereof |
| CN112371711A (en) * | 2020-09-21 | 2021-02-19 | 深圳市南科环保科技有限公司 | Low-permeability soil multiphase extraction equipment and method |
-
2019
- 2019-12-05 CN CN201922156006.9U patent/CN211437452U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961444A (en) * | 2019-12-05 | 2020-04-07 | 煜环环境科技有限公司 | Multiphase extraction well system and installation and clean disposal method thereof |
| CN110961444B (en) * | 2019-12-05 | 2023-10-27 | 煜环环境科技有限公司 | Multiphase extraction well system and installation and cleaning treatment method thereof |
| CN112371711A (en) * | 2020-09-21 | 2021-02-19 | 深圳市南科环保科技有限公司 | Low-permeability soil multiphase extraction equipment and method |
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