CN103043862A - Underground water pollution in-situ restoration device based on synchronous shattering and hydrodynamic circulating - Google Patents
Underground water pollution in-situ restoration device based on synchronous shattering and hydrodynamic circulating Download PDFInfo
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Abstract
An underground water pollution in-situ restoration device based on synchronous shattering and hydrodynamic circulating comprises more than two hydrodynamic shattering wells and more than one pneumatic stripping circulating well; each pneumatic stripping circulating well is a double-layer well, an upper-layer screen stencil and a lower-layer screen stencil are arranged in the pneumatic stripping circulating well, an air pump is connected to the inner well of the pneumatic stripping circulating well, and the outer well of the pneumatic stripping circulating well is connected to an extraction pump and is in pipe connection with a gas treatment device outside the pneumatic stripping circulating well; each hydrodynamic shattering well is provided with a fracture layer in a low-permeability soil layer, the fracture layer is formed through hydrodynamic fracturing, and fracturing propping agent is injected into fractures; the fractures are formed through synchronous hydrodynamic fracturing of each two paired hydrodynamic shattering wells; and the device further comprises a hydrodynamic fracturing pump, a surface active agent adding tank and the like. The device provided by the invention has the advantages that the defect of narrow underground soil layer aperture passage is effectively solved due to the synchronous fracturing wells (namely the hydrodynamic shattering wells), pneumatic stripping of VOC (Volatile Organic Compounds) can be performed by the pneumatic stripping circulating wells under a hydrodynamic circulating condition, and the VOC restoration capability is greatly improved in combination with synchronous injection of surface active agent.
Description
Technical field
The invention belongs to the soil and groudwater remediation technical field, relate to the prosthetic device of a kind of soil or underground water, particularly relate to a kind of groundwater pollution in-situ repairing device based on the hydrodynamics circulating that shatters synchronously.
Background technology
Along with the contradiction between environment and the human development becomes increasingly conspicuous in all fields with sharp-pointed, pollution problem also more and more causes people's attention.Current, China soil and groundwater pollute occurred poisonous chemical industry and heavy metal contamination by industry to agricultural shift, by the city to transfer of rural, by the earth's surface to underground transfer, shift downstream, polluted by water and soil the trend that shifts to food cycle by the upstream, progressively the pollution of accumulation is developing into the frequent outburst of pollution incident.And the organic contamination in the soil and groundwater usually has characteristics such as kind is many, content is low, harm is large, refractory reason, and many organic pollutants have carcinogenic, teratogenesis, mutagenic " three-induced effect ", and HUMAN HEALTH is had a strong impact on.Therefore also day by day urgent to the demand of soil and groundwater pollution remediation technology.
In the Organic Contamination of Groundwater thing, a considerable amount of volatile organic matters (Volatile Organic Compounds is arranged, VOC), be the larger organism of a kind of hazardness in the groundwater pollution, its quantitative mensuration has been become the important indicator that environment department estimates the groundwater pollution degree.
Present stage soil or groundwater pollution is processed or the method for repairing mainly comprises: 1) Physical, a kind of method of namely with the means of physics Polluted Groundwater being administered comprises screen method, passive collecting method, hydrodynamic(al) force controlling method; 2) method of chemical treatment comprises method for dosing medicine, perviousness processing bed technique, irrigation, soil modification method etc.; 3) biological restoration comprises biological injection, organic clay method etc.Divide by repairing the position, can be divided into showering and original position and repair 2 classes.
In the method for the underground water of processing the VOC pollution, underground water original position aeration (AS) is the wider technology of using at present, it be one with air Injection in the saturation region, waterbearing stratum, volatile organic matter (Volatile Organic Compounds is removed in stripping effect by airflow, and strengthen the novelty based technique for in-situ remediation of microbiological deterioration effect VOCs).But there is certain drawback in present AS underground water recovery technique, if the heterogeneous saturation zone soil layer of soil layer rate of permeation is bad, the effect of the underground water reparation (Liu Xiaona that can have a greatly reduced quality, Cheng Lirong, the domestic and international progress of underground water aeration technology (AS), China's safety in production science and technology).
The AS technique device can not solve effectively that soil layer poor permeability, the loss of waterpower transmitting energy that the AS method exists are large, the low shortcoming of remediation efficiency in the prior art.Generally, recovery technique and the equipment of China's polluted underground water are the showering technology and equipment mostly at present, and are in research and development and experimental phase, and commercial application seldom.External corresponding instrument equipment can not meet the demand of China's soil and groudwater remediation fully.
Summary of the invention
The object of the invention is to the above-mentioned deficiency for prior art, provide a kind of original position that combines with the hydrodynamics circulating aeration based on shattering synchronously to repair the device of underground water, solve existing AS device and in repair process, can't solve soil layer poor permeability, the loss of waterpower transmitting energy greatly and the low technical problem of remediation efficiency, device of the present invention can strengthen the remediation efficiency of aeration, improves the repair ability of volatile organic matter in the in-situ treatment soil and groundwater.
For achieving the above object, the present invention adopts following technical scheme:
A kind of groundwater pollution in-situ repairing device based on the hydrodynamics circulating that shatters synchronously, it is characterized in that, described device comprises hydrodynamic(al) shatter well, pneumatic strip cycles well, hydrodynamic(al) fracturing pump, fracturing propping agents transferpump and storage tank, tensio-active agent grug feeding jar and dosing fall pipe, aerator pump, extraction pump and gas treatment equipment; Described hydrodynamic(al) fracturing pump and fracturing propping agents transferpump are connected to hydrodynamic(al) by fracture manifold and shatter in the well, and the fracturing propping agents transferpump connects the fracturing propping agents storage tank; Described tensio-active agent grug feeding jar connects the dosing pipe that falls, and the dosing pipe that falls is put into hydrodynamic(al) shatter well and/or pneumatic strip cycles well;
Described pneumatic strip cycles well is more than a bite in the polluted underground water zone, and well depth passes the soil layer that the polluted underground water layer arrives low-permeability, and upper strata screen cloth and lower screen are set in the well; Pneumatic strip cycles well is double-deck well, and interior well connects aerator pump, and outer well connects extraction pump, and by the outer gas treatment equipment of pipeline connecting well;
The described hydrodynamic(al) well that shatters is more than two mouthfuls in the polluted underground water zone, and well depth arrives the soil layer of low-permeability, has the fracture layers that produces through the hydrodynamic(al) pressure break in this soil layer of down-hole, injects fracturing propping agents in the crack; The crack is to arbitrary hydrodynamic(al) selected its pairing well of well that shatters, and the moving well that shatters of two mouthfuls of water of selected pairing is carried out synchronous hydrodynamic(al) pressure break produce.
In the described device, the monitor well that a bite is above be can also comprise, soil layer construction and groundwater pollution situation are used for understanding.
Described synchronous hydrodynamic(al) pressure break, hydrodynamic(al) pressure break when referring to select two mouthfuls of hydrodynamic(al)s near each other and that the degree of depth is roughly the same to shatter between well (hydrodynamic(al) shatter pairing well) horizontal well.Pressure break is to make pressure liquid and propping agent under high pressure from a bite well to the shortest method of another mouthful well migration distance synchronously.Because the position of fractured well approaches, if successively two mouthfuls of wells are carried out pressure break, only may cause generation fluid channel in second mouthful of well and cut off the fluid channel of First well.Pressure break can allow and all be reached maximization by the crack of two mouthfuls of wells of pressure break synchronously.
In the described device, the distance that the well that shatters of selected pairing carries out synchronous pressure break is 15-40m, and level error is no more than 1.5m.
Those skilled in the art have known the method and apparatus of hydrodynamic(al) pressure break.Normally adopt the hydrodynamic(al) pump rotation inject high pressure current in the backward well that pressurize that shatter, make soil layer produce the crack.After the crack produces, inject the pressure break agent and carry fracturing propping agents, fracturing propping agents are injected in the space to support the crack.
The shatter pressure of pump of described hydrodynamic(al) is 1200-2000Psi.
Described propping agent is that granularity is 20～40 purpose grains of sand fracturing propping agents.
Preferably, monitor well spacing 3-15m in the polluted underground water zone in the described device, the hydrodynamic(al) well spacing 15-50m that shatters, pneumatic strip cycles well spacing 3-20m.
The tensio-active agent that the underground water reparation is added is stored in the tensio-active agent grug feeding jar, and adds hydrodynamic(al) and shatter in well and/or the pneumatic strip cycles well by the dosing pipe that falls.As known to those skilled in the art, tensio-active agent can adopt anion surfactant or nonionogenic tenside according to needs.
Described pneumatic strip cycles well is double-deck well, outer aboveground upper strata screen cloth and the lower screen of arranging, and lower screen is comprised of a plurality of screen cloth rings, with the control sleeve, is used for the layered circulation of control underground water on any one lower screen ring; Internal layer down-hole section connects aerating apparatus.
The aeration rate of described aerator pump is 10-3000ml/min.
Beneficial effect: the underground water of the present invention hydrodynamics circulating in-situ repairing device that shatters has synchronously solved the shortcoming that the AS technology exists in the prior art effectively, fractured well has solved underground soil layer arctation effectively synchronously, the loss of waterpower transmitting energy is large, form the polluted underground water power cycle in the pneumatic strip cycles well, under the water cycle state, VOC is carried out pneumatic peeling off, mating surface promoting agent simultaneous implantation has greatly strengthened the remediation efficiency of pneumatic strip cycles well.Described device is used for groundwater pollution and processes the repair ability that can greatly improve volatile organic matter in the processing soil and groundwater, comprises at least following advantage:
1) synchronous fractured well has increased density and the surface-area of hydraulically created fracture network, utilize the advantage of interwell communication increase the workspace crack degree and intensity, be communicated with to greatest extent natural fracture, the workspace environmental influence is little, completion speed is fast, saves the pressure break cost more than 30%.
2) pneumatic strip cycles well is double-deck well construction, namely is that aeration well is again extraction well, forms hydrodynamics circulating in the well, can strengthen the remediation efficiency of aeration, improves the repair ability of volatile organic matter in the underground water.
3) hydrodynamic(al) shatters well and/or pneumatic strip cycles well simultaneously as tensio-active agent dosing well, and a well is multiplex.Well has increased density and the surface-area of network of fracture because hydrodynamic(al) shatters, so that the transmission of tensio-active agent is more rapid, improves the efficient that medicament utilizes; The dosing in same well of pneumatic strip cycles well can improve remediation efficiency, strengthens repairing effect.The multiplex well-digging quantity that reduced of one well is saved the well-digging cost.
Describe the present invention below in conjunction with specific embodiment.Protection scope of the present invention is not limited with embodiment, but is limited by claim.
Description of drawings
Fig. 1 is based on the structural representation of the groundwater pollution in-situ repairing device of the hydrodynamics circulating that shatters synchronously.
Fig. 2 well pairing schematic diagram that shatters synchronously.
The pneumatic strip cycles well construction of Fig. 3 schematic diagram.
Embodiment
As shown in Figure 1 and Figure 2, a kind of groundwater pollution in-situ repairing device based on the hydrodynamics circulating that shatters synchronously comprises following equipment:
1) detect well more than a bite in the polluted underground water zone, well spacing 3-15m is to understand soil layer construction and groundwater pollution situation.
2) well 4 that shatters of the hydrodynamic(al) more than two mouthfuls in the same area, well spacing 15-50m, well depth arrives the soil layer of low-permeability.Described hydrodynamic(al) shatters behind the well 4 selected pairing wells, adopt the hydrodynamic(al) pump 1 that shatters that it is carried out synchronous hydrodynamic(al) pressure break, the shatter pressure of pump 1 of hydrodynamic(al) is 1200-2000Psi, and the soil layer of down-hole low-permeability produces the crack, and injecting granularity in the crack is 20～40 purpose grains of sand fracturing propping agents.Synchronously in the hydrodynamic(al) pressure break, the pairing well two well spacings that shatter are 15-40m, and level error is no more than 1.5m.
3) the above pneumatic strip cycles well 9 of a bite in the same area, well spacing 3-20m, well depth should pass the polluted underground water layer and arrive the low soil layer of rate of permeation.Pneumatic strip cycles well 9 is double-deck well, outer aboveground upper strata screen cloth 10 and the lower screen 16 of arranging, and lower screen 16 is comprised of a plurality of screen cloth rings, control sleeve 17 is arranged on the lower screen 16, internal layer well 18 tops connect aerator pump 13, and the bottom connects aerating apparatus 19, outer aboveground connection off-gas pump 14.
4) the outer gas treatment equipment 15 of well is connected with off-gas pump 14 by pipeline.
5) tensio-active agent grug feeding jar 11 and dosing fall to managing 12.Hydrodynamic(al) shatters and stretches into respectively the dosing pipe 12 that falls in well 4 and pneumatic strip cycles well 9 wells, is deep into place, crack layer, and dosing pipe 12 1 ends that fall link to each other the other end connection dosing shower nozzle with dosing pneumatic pump on the tensio-active agent grug feeding jar 11 with control valve.Tensio-active agent storage tank 11 interior storage tensio-active agents are such as Sodium dodecylbenzene sulfonate or tween 80.
6) form hydrodynamic(al) the shatter required hydrodynamic(al) fracturing pump 1 of well, fracturing propping agents transferpump 6 and storage tank 8, slurries mixer 7, and manifold, valve member etc.
Synchronously the hydrodynamic(al) pressure break is carried out the hydrodynamic(al) pressure break to the pairing hydrodynamic(al) well that shatters by prior art, and concrete grammar is, the hydrodynamic(al) well 4 that shatters is got to the degree of depth in the soil layer that need to shatter.The twin spans pkr will be placed in the sleeve pipe, and the spray gun of sleeve pipe and tapered baffle plate composition will be positioned in the lowermost end of the well that shatters simultaneously.The side pressure energy seal sleeve that the stainless steel sleeve pipe is outer, and can prevent the suspension liquid leakage.High-pressure spray gun (with the stainless steel tube of thin spray orifice) is pressed close to conical baffled, and High-Pressure Water is up to generation the water column of the pressure of 3500psi through lance ejection.Water column will be in well rotary-jet, soil layer is produced the horizontal slit of dish shape 1-2 rice.After hydrodynamic(al) shatters, shower nozzle is accessed fracturing propping agents storage tank 8, inject fracturing propping agents.When jet pipe took out from well, shower nozzle will be stayed in the soil.After the effect that shatters reaches, the twin spans pkr is taken out, stretch into the dosing pipe 12 that falls in the well and be deep into place, crack layer.
As shown in Figure 3, described pneumatic strip cycles well 9 is double-deck wells, outer aboveground have upper strata screen cloth 10 and lower screen 16, and lower screen 16 comprises a plurality of screen cloth rings, with control sleeve 17, is used for the layered circulation of control underground water on the screen cloth ring.In the pneumatic strip cycles well, underground water forms hydrodynamics circulating and separates with lower screen by the upper strata screen cloth in well.Underground water enters from a plurality of screen cloth rings of lower screen, flows out from the upper strata screen cloth, and a plurality of screen cloth rings of lower screen are in the aquifer of polluted underground water, and the upper strata screen cloth is placed on the phreatic line.By the inside well aeration of aerator pump, bubble is released to contaminated underground water.In pneumatic strip cycles well, form the airlift pump system behind the aeration, so that underground water upwards flows.Because exist density gradient, gas-vapor mix to rise until the upper strata screen cloth in the well, gas separates by the upper strata screen cloth, outer well connects suction pump, and gas is extracted out from annular space, is extracted into well by suction pump and processes outward.VOC is isolated underground water, and the Polluted area that flows downward back again will circulate.Form the hydrodynamics circulating of underground water in the pneumatic strip cycles well, until pollutent is processed clean.
Adopt said apparatus that polluted underground water is carried out the original position reparation, may further comprise the steps:
1) makes a call to more than two mouthfuls the hydrodynamic(al) well that shatters, the soil layer of well depth arrival low-permeability in polluted underground water zone;
2) beat pneumatic strip cycles well more than a bite in same polluted underground water zone, well depth passes the soil layer that the polluted underground water layer arrives low-permeability, described pneumatic strip cycles well is double-deck well, upper strata screen cloth and lower screen are set in the well, interior well connects aerator, and outer well connects extraction equipment;
3) to arbitrary hydrodynamic(al) selected its pairing well of well that shatters, the moving well that shatters of two mouthfuls of water of selected pairing is carried out synchronous hydrodynamic(al) pressure break, make soil layer produce the crack, reduce the seepage resistance of fluid in the soil layer of shaft bottom and change the seepage state of fluid;
4) tensio-active agent is injected in the underground water of pollution by shatter well and/or pneumatic strip cycles well of hydrodynamic(al);
5) start simultaneously aeration and extraction equipment and start pneumatic strip cycles well, aerator is to pneumatic strip cycles well continuous aeration, underground water is entered from lower screen, flow out from the upper strata screen cloth, underground water circulates from bottom to top, volatile gases separates by the upper strata screen cloth, is processed by extraction equipment suction external treatment system.
Device of the present invention, organic processing efficiency can reach more than 95% in the polluted underground water.
Claims (8)
1. groundwater pollution in-situ repairing device based on the hydrodynamics circulating that shatters synchronously, it is characterized in that, described device comprises hydrodynamic(al) shatter well, pneumatic strip cycles well, hydrodynamic(al) fracturing pump, fracturing propping agents transferpump and storage tank, tensio-active agent grug feeding jar and dosing fall pipe, aerator pump, extraction pump and gas treatment equipment;
Described hydrodynamic(al) fracturing pump and fracturing propping agents transferpump are connected to hydrodynamic(al) by fracture manifold and shatter in the well, and the fracturing propping agents transferpump connects the fracturing propping agents storage tank;
Described tensio-active agent grug feeding jar connects the dosing pipe that falls, and the dosing pipe that falls is put into hydrodynamic(al) shatter well and/or pneumatic strip cycles well;
Described pneumatic strip cycles well is more than a bite in the polluted underground water zone, and well depth passes the soil layer that the polluted underground water layer arrives low-permeability, and upper strata screen cloth and lower screen are set in the well; Pneumatic strip cycles well is double-deck well, and interior well connects aerator pump, and outer well connects extraction pump, and by the outer gas treatment equipment of pipeline connecting well;
The described hydrodynamic(al) well that shatters is more than two mouthfuls in the polluted underground water zone, and well depth arrives the soil layer of low-permeability, has the fracture layers that produces through the hydrodynamic(al) pressure break in this soil layer of down-hole, injects fracturing propping agents in the crack; The crack is to arbitrary hydrodynamic(al) selected its pairing well of well that shatters, and the moving well that shatters of two mouthfuls of water of selected pairing is carried out synchronous hydrodynamic(al) pressure break produce.
2. groundwater pollution in-situ repairing device according to claim 1 is characterized in that, in the described device, can also comprise the monitor well that a bite is above.
3. groundwater pollution in-situ repairing device according to claim 1 is characterized in that, the described hydrodynamic(al) well spacing 15-50m that shatters, pneumatic strip cycles well spacing 3-20m.
4. groundwater pollution in-situ repairing device according to claim 1 is characterized in that, in the described device, the shatter distance of well of the selected pairing hydrodynamic(al) that carries out synchronous pressure break is 15-40m, and level error is no more than 1.5m.
5. groundwater pollution in-situ repairing device according to claim 1 is characterized in that, the described hydrodynamic(al) fracturing propping agents that inject in the well crack that shatter are that granularity is 20～40 purpose grains of sand fracturing propping agents.
6. groundwater pollution in-situ repairing device according to claim 1, it is characterized in that, described pneumatic strip cycles well is double-deck well, outer aboveground upper strata screen cloth and the lower screen of arranging, lower screen is comprised of a plurality of screen cloth rings, and any one lower screen ring is provided with the control sleeve; Internal layer down-hole section connects aerating apparatus.
7. groundwater pollution in-situ repairing device according to claim 1 is characterized in that, the pressure of described hydrodynamic(al) fracturing pump is 1200-2000Psi.
8. groundwater pollution in-situ repairing device according to claim 1 is characterized in that, the aeration rate of described aerator pump is 10-3000ml/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103864263A (en) * | 2014-02-14 | 2014-06-18 | 北京鼎实环境工程有限公司 | Circulating well system for removing volatile organic compounds in underground water |
| CN103896391A (en) * | 2014-04-17 | 2014-07-02 | 厦门大学 | Underground water remediation method using surfactant for reinforcement |
| CN105712412A (en) * | 2014-11-30 | 2016-06-29 | 江苏维尔利环保科技股份有限公司 | In situ perfusion method for remediation of organic contaminated groundwater |
| CN113857224A (en) * | 2020-06-30 | 2021-12-31 | 中国石油化工股份有限公司 | Multiphase extraction soil remediation method after soil layer microcirculation structure is constructed through fracturing |
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