CN202379856U - Air injection system for remedying volatile organic pollutants in underground water in situ - Google Patents
Air injection system for remedying volatile organic pollutants in underground water in situ Download PDFInfo
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- CN202379856U CN202379856U CN 201120561733 CN201120561733U CN202379856U CN 202379856 U CN202379856 U CN 202379856U CN 201120561733 CN201120561733 CN 201120561733 CN 201120561733 U CN201120561733 U CN 201120561733U CN 202379856 U CN202379856 U CN 202379856U
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Abstract
An air injection system for remedying volatile organic pollutants in underground water in situ comprises air supply equipment, an air injection well, an underground water monitoring well and a soil gas monitoring well. The air supply equipment consists of underground air supply equipment and surface air supply equipment. The underground air supply equipment comprises an air injection steel tube and an expansion air blocking device, and the air injection steel tube is located in the air injection well. The surface air supply equipment comprises an air injection pipeline and an inflating pipeline, the air injection pipeline is connected with the air injection steel tube, and the inflating pipeline is connected with an inflating connector of the expansion air blocking device. The air injection system is low in cost of equipment and high in work efficiency, and can guarantee fast remediation of underground water. In addition, in an underground water remediation process, secondary pollution and damage to an ecological environment are avoided, the technology suitable to be widely applied to underground water remediation of polluted places is adopted, and the problem of underground water pollution can be resolved efficiently and fast.
Description
Technical field
The utility model belongs to the in-situ immobilization field of underground water pollution, and in particular to a kind of contaminated site groundwater remediation system.
Background technology
Become increasingly conspicuous with industrial high speed development, the problem of China's underground water pollution, the influence to environment and economic development that underground water pollution is brought also appears increasingly.At present, developed country has been put into a large amount of manpower and materials and region of getting dirty is repaired, and the based technique for in-situ remediation of underground water has also obtained rapid development.To ensure the safety of Eco-Environment System and the sustainable use of underground water, it is necessary to the underground water being contaminated is repaired, therefore, the research and development of associated restoration technology are extremely urgent.
China repairs field in contaminated site and started late, and for the reparation of the underground water volatile organic contaminant in contaminated site, there is presently no recovery project application on the spot on a large scale.At present, the based technique for in-situ remediation of underground water mainly has biological prosthetic, physical chemistry reparation etc..Wherein, biological prosthetic mainly to include subterranean microorganisms degraded and aerial plant reparation, such a reparation will not destroy ecological environment, but repair process is slow；Peripheral doses include drawing water processing, isolation seal, solidify stable, soil be evacuated be aerated, the technology such as ultrasonic wave and microwave treatment and electromotion repairing technique, these technologies can preferably remove pollution, but cost is higher, and may influence ecological environment.Preferable environmental pollution recovery technique should low cost, repairing effect is good and does not destroy ecological environment.
Existing air injection technique is by the way of direct injection, underground water saturation region is injected pressurized air into act on by stripping, pollutant is set to ascend into non-saturated region with compressed air, gaseous contaminant can be handled by non-saturated region biodegradation, or directly extract progress subsequent treatment out.Its essence is volatile contaminant from liquid phase is transferred to gas phase, and removed in the gas phase.The design parameter of air ejector system needs to obtain by the on-the-spot test of early stage, but so far, the research for injecting recovery technique about underground water air is also in the laboratory research stage mostly, lack supporting ripe technical system, so as to hinder the application of air injection technique heavy industrialization.When repairing underground water using air injection technique, air injector well need to be built, while installing obstructing instrument in well.The device is the crucial corollary equipment of whole technology, and main purpose is to ensure that compressed air is effectively injected to underground water saturation region, while backflow can not be produced in injector well.The existing corollary equipment used for air injection technique, complex structure and can not be reused, and price is costly, larger using operation difficulty, and engineering cost is high.Therefore, while application air injection technique repairs volatility organic contamination underground water, it is necessary to develop reusable and cheap crucial corollary equipment, air injection technique is more widely used.
Utility model content
The utility model provides a kind of air ejector system of volatile organic contaminant in in-situ remediation of underground water, and the in-situ immobilization progress that solve underground water is slow, rehabilitation cost is high, the technical problem that is damaged to ecological environment, be difficult to industrialize large-scale application.
The utility model solves the technical scheme that its technical problem used：
The air ejector system of volatile organic contaminant in this in-situ remediation of underground water, including air feed equipment, air injector well, groundwater monitoring well and SOIL GAS monitoring well, the air feed equipment are made up of underground air feed equipment and ground air feed equipment two parts；
Underground air feed equipment includes the gas injection steel pipe and intumescent gas barriers being located in air injector well, and intumescent gas barriers are arranged on the middle and lower part of gas injection steel pipe；The intumescent gas barriers include the packing element assembly that elastic material is cased with the main air injection pipe with gas injection fastener for connection, main air injection pipe, and main air injection pipe is also cased with one group of packing element joint, protective case, transition joint, adapter sleeve in the symmetrical above and below of packing element assembly respectively；The upper orifice of the packing element assembly is placed on packing element joint I lower outsides; protective case I be placed on the outside of the upper orifice of packing element assembly simultaneously with clamping in the middle part of packing element joint I outer walls; transition joint I is placed on packing element joint I upper outsides, and adapter sleeve I is connected between transition joint I and top connection；Gas injection cavity is enclosed between top connection, adapter sleeve I, transition joint I and main gas injection pipe outer wall, and leave gas passage between main gas injection pipe outer wall in both transition joint I and packing element joint I, gas passage one end connects gas injection cavity, and the other end connects the space between main air injection pipe and packing element assembly；Top connection, which is provided with, to be used to make the upper interface of main air injection pipe and gas injection fastener for connection, and provided with inflatable interface by upper interface, inflatable interface upper end is connected with external inflation pipe, and inflatable interface lower end is extended downwardly to be connected with gas injection cavity；The lower nozzle of the packing element assembly is placed on packing element joint II upper outsides; protective case II be placed on the outside of the lower nozzle of packing element assembly simultaneously with clamping in the middle part of packing element joint II outer walls; transition joint II is placed on packing element joint II lower outsides; adapter sleeve II is connected between transition joint II and box cupling, the connection lower contact of box cupling lower end；Both packing element joint II and transition joint II are closely placed on main gas injection pipe outer wall；
Ground air feed equipment includes the gas injection pipeline with gas injection fastener for connection, and the loading line being connected with the inflatable interface of intumescent gas barriers；The air injection pipe route air compressor, helium steel cylinder, storage tank, appendix, air injection pipe, gas injection valve, ball valve, flowmeter and pressure gauge are constituted；Air inlet connection of the gas outlet of air compressor through appendix I and storage tank, ball valve I and flowmeter I are sequentially provided with appendix I, ball valve II and flowmeter II are sequentially provided with another air inlet connection of the gas outlet of helium steel cylinder through appendix II and storage tank, appendix II；The gas outlet of storage tank is sequentially provided with ball valve III, flowmeter III, pressure gauge and gas injection valve through the gas injection fastener for connection in air injection pipe and air injector well in air injection pipe, in gas injection valve and air injection pipe between pressure gauge through branch road and ball valve
Connection；The loading line is by small-sized air compressor, gas tube and ball valve
Constitute, the gas outlet of small-sized air compressor is connected through gas tube with the inflatable interface of intumescent gas barriers, gas tube is provided with ball valve
；
The air injector well is made up of air injector well well casing and packed layer, air injector well well casing sealed bottom, and air injector well well casing is followed successively by precipitation pipeline section, sieve tube segment and straight length from bottom to top；30~50cm of sediment tube segment length, sieve tube segment is arranged at below target stains area at 0.3~1.5m, straight length upper end is extended to more than ground, the packed layer is by quartzy sand filter blanket, bentonite bed and concrete layer are constituted, quartzy sand filter blanket is filled in around sieve tube segment, its upper and lower ends at least grows 30cm than sieve tube segment, a bentonite bed part is filled between quartzy sand filter blanket and concrete layer, its top surface is flushed with the aquiclude upper end of rock stratum, another part is filled in quartzy sand filter blanket between air injector well foot of hole, concrete layer is filled in bentonite bed between ground；
The groundwater monitoring well is made up of groundwater monitoring well well casing, well cap and packed layer, the groundwater monitoring well well casing sealed bottom, and groundwater monitoring well well casing is followed successively by precipitation pipeline section, sieve tube segment and the part of straight length three from bottom to top；30~50cm of the sediment tube segment length, sieve tube segment is positioned in the range of target stains area, and length disclosure satisfy that the variation in target stains area caused by SEA LEVEL VARIATION, and straight length extends upwardly to ground, its top capping pipe cap；The packed layer is made up of quartzy sand filter blanket, bentonite bed and concrete layer, quartzy sand filter blanket is filled in around sieve tube segment, its upper and lower ends at least grows 30cm than sieve tube segment, a bentonite bed part is filled between quartzy sand filter blanket and concrete layer, its top surface is flushed with the aquiclude upper end of rock stratum, another part is filled in quartzy sand filter blanket between groundwater monitoring well foot of hole, and concrete layer is filled in bentonite bed between ground；
The SOIL GAS monitoring well is popped one's head in by SOIL GAS, soft air-guide pipe, quick-connecting valve, pillar, pipe cap and packed layer are constituted, it is spaced and cracks on the tube wall of the SOIL GAS probe, it is internal that SOIL GAS probe is stretched into the soft air-guide pipe lower end, upper end is above the ground level at least 30cm and to be connected with quick-connecting valve above the ground, it is cased with having pipe cap on pillar, pillar on the outside of quick-connecting valve；The packed layer is made up of quartzy sand filter blanket, bentonite bed and concrete layer, quartzy sand filter blanket is filled in around SOIL GAS probe, its upper and lower ends at least grows 30cm than SOIL GAS probe, a bentonite bed part is filled between quartzy sand filter blanket and concrete layer, its top surface is flushed with the aquiclude upper end of rock stratum, another part is filled in quartzy sand filter blanket between SOIL GAS monitoring well foot of hole, and concrete layer is filled in bentonite bed between ground.
The air injector well well casing, groundwater monitoring well well casing, the material of SOIL GAS probing shell are chemical grade UPVC, and the material of soft air-guide pipe is PVC.
The packing element assembly is quality of rubber materials, and the material of the device remaining part is 35CrMo structural alloy steels；The upper orifice inwall of packing element assembly is provided with the inner groovy for being used for accommodating packing element joint I bottoms, and upper orifice outer wall is provided with the external groove for being used for accommodating protective case I；The lower nozzle of the packing element assembly is identical with upper orifice shape.
The main air injection pipe and the upper interface of top connection are set for the eccentric, and inflatable interface is located at side of the upper interface away from top connection center.
The transition joint I is with being provided with groove and being provided with sealing ring on packing element joint I and adapter sleeve I contact surface, top connection is with being provided with groove and provided with sealing ring on adapter sleeve I and the contact surface of main gas injection pipe outer wall；
The transition joint II is with being provided with groove and being provided with sealing ring on packing element joint II, adapter sleeve II and the contact surface of main gas injection pipe outer wall, box cupling is with being provided with groove and provided with sealing ring on adapter sleeve II and the contact surface of main gas injection pipe outer wall；
The transition joint I inwalls are step-like in what is coordinated each other with packing element joint I shaped upper parts, and transition joint I outer walls top and top connection outer wall bottom are respectively provided with the groove for accommodating adapter sleeve I；
The transition joint II inwalls are step-like in what is coordinated each other with packing element joint II shaped upper parts, and transition joint II outer walls bottom and box cupling outer wall top are respectively provided with the groove for accommodating adapter sleeve II.
Suitable for reading are provided with the middle part of interior edge, packing element joint I outer walls of the protective case I has flange, protective case I interior edge and the flange clamping on packing element joint I；
The lower mouth of the protective case II, which is provided with the middle part of interior edge, packing element joint II outer walls, flange, protective case II interior edge and the flange clamping on packing element joint II.
The beneficial effects of the utility model are as follows：
The utility model is by the gas after pressurization（Generally use air or oxygen）It is expelled in the saturated zone of underground water, to reduce concentration of the absorption in soil and the volatile material being dissolved in underground water.Meanwhile, air injection can also increase the oxygen in underground water, so as to promote biodegradation.
During repairing construction, the specially designed intumescent gas barriers of the utility model are transferred to relevant position in air injector well, by loading line to injecting compressed air between main gas injection pipe outer wall and packing element assembly, packing element assembly is set gradually to expand to form closed annular space, finally it is adjacent to the borehole wall, so that it is guaranteed that unidirectionally being injected by the compressed air of main air injection pipe in underground reservoir, the barrier of mine gas and liquid is realized.The device efficiently solves a crucial problem of air injection technique practical engineering application.At the end of whole recovery project, compressed air can slowly be discharged by the pipeline being connected with inflatable interface, the rubber of packing element assembly is slowly reverted to original state, i.e. device and be unsealed, the device that solution is honored as a queen can be recycled to ground using proprietary instruments such as elevators.The intumescent gas barriers are in addition to the rubber of packing element assembly is quality of rubber materials, and remaining material uses 35CrMo structural alloy steels, with higher static strength, impact flexibility and fatigue limit.Main air injection pipe and the upper interface eccentric setting in top connection, it can be ensured that inflatable interface is smoothly connected with packing element annular seal space.Intumescent gas barriers it is simple in construction, be easily installed and use, setting reliability, good airproof performance, dwell time length, iris action are obvious, energy consumption is low, can withdraw, unseal out of injector well after device pressure release, taking out to realize recycling, use cost is cheap.It ensure that using intumescent gas barriers and quick, unidirectional gas injection realized in air injector well, disclosure satisfy that the need for being repaired to the underground water of volatile organic matter contaminated site using extensive air injection technique in situ.
The air injecting method of volatile organic contaminant can obtain optimal gas injection pressure, gas flow by gas injection pressure and flow rate test in the utility model in-situ remediation of underground water；Tested by groundwater pressure response test, the test of underground water dissolved oxygen, helium tracer flow, SOIL GAS, the air injection radius of influence can be obtained, so that the remediation efficiency of system reaches most preferably, repairing effect is ensure that while rehabilitation cost is controlled.
The utility model overcomes that conventional method progress is slow, high cost, the shortcoming damaged to ecological environment, solves the technical problem for being difficult to industrialize large-scale application in groundwater remediation field.
The utility model cost of equipment is low, high working efficiency, can guarantee that underground water is quickly repaired.It is a kind of technology for being adapted to the large-scale application on contaminated site groundwater remediation, the problem of can be used to efficiently and rapidly solve underground water pollution in addition, during groundwater remediation, secondary pollution will not be caused to destroy ecological environment.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the floor plan of the utility model testing procedure.
Fig. 2 is the structural representation of air feed equipment.
Fig. 3 is the profile of air injector well.
Fig. 4 is the profile of groundwater monitoring well.
Fig. 5 is the profile of SOIL GAS monitoring well.
Fig. 6 is the structural representation of intumescent gas barriers.
Fig. 7 is the enlarged drawing on Fig. 6 tops.
Fig. 8 is the enlarged drawing of Fig. 6 bottoms.
Fig. 9 is Fig. 6 overlooking the structure diagram.
Figure 10 is the application method schematic diagram of intumescent gas barriers.
Reference：1- air injector wells, 2- groundwater monitoring wells, 3- SOIL GAS monitoring wells, 4- intumescent gas barriers, 4.1- top connections, 4.2- adapter sleeves I, 4.3- transition joints I, 4.4- protective cases I, 4.5- packing element joints I, 4.6- packing element assemblies, the main air injection pipes of 4.7-, 4.8- box cuplings, 4.9- lower contacts, 4.10- adapter sleeves II, 4.11- transition joints II, 4.12- protective cases II, 4.13- packing element joints II, 4.14- sealing rings, 4.15- gas injection cavitys, 4.16- gas passages, 4.17- annular seal spaces, 4.18- inflatable interfaces, the upper interfaces of 4.19-, 5- helium steel cylinders, 6- ball valves I, 7- ball valves II, 8- flowmeters I, 9- flowmeters II, 10- storage tanks, 11- ball valves III, 12- flowmeters III, 13- pressure gauges, 14- ball valves
, 15- gas injections valve, 16- gas injections steel pipe, 17- air compressors, 18- small-sized air compressors, 19- ball valves
, 20- appendixs I, 21- appendixs II, 22- branch roads, 23- air injection pipes, 24- gas tubes, 25- air injector well well casings, 25.1- straight lengths, 25.2- sieve tube segments, 25.3- precipitates pipeline section, 26- quartz sand filter blankets, 27- bentonite beds, 28- concrete layers, 29- pipe caps, 30- groundwater monitoring well well casings, 30.1- straight tubes, 30.2- screen casings, 30.3- sediments tube, 31- pillars, 32- quick-connecting valves, 33- soft air-guide pipes, 34- SOIL GASs are popped one's head in, 35- underground water peak levels, 36- ground.
Embodiment
Embodiment is referring to shown in Fig. 1, Fig. 2, the air ejector system of volatile organic contaminant in this in-situ remediation of underground water, including air feed equipment, air injector well 1, groundwater monitoring well 2 and SOIL GAS monitoring well 3.The air feed equipment is made up of underground air feed equipment and ground air feed equipment two parts.In air injection influence test, air ejector system 1 is at least provided with one, groundwater monitoring well 2 at least provided with two, SOIL GAS monitoring well 3 at least provided with five, mark G1, G2, G3, SOIL GAS monitoring well 3 are mark S1, S2, S3, S4, S5, S6 in Fig. 1 in groundwater monitoring well 2 i.e. Fig. 1, the groundwater monitoring well 2 and the laying of SOIL GAS monitoring well 3 should be able to obtain the air flow method situation on the different distance different directions of air injector well 1, and specific deployment scenarios can be adjusted accordingly according to field condition.
Shown in Figure 2, underground air feed equipment includes the gas injection steel pipe 16 and intumescent gas barriers 17 being located in air injector well 1, and intumescent gas barriers 17 are arranged on the middle and lower part of gas injection steel pipe 16.
Ground air feed equipment includes the gas injection pipeline being connected with gas injection steel pipe 16, and the loading line being connected with the inflatable interface 4.18 of intumescent gas barriers 4；The air injection pipe route air compressor 17, helium steel cylinder 5, storage tank 10, appendix, air injection pipe, gas injection valve, ball valve, flowmeter and pressure gauge are constituted；The gas outlet of air compressor 17 is connected through appendix I20 with an air inlet of storage tank 10, ball valve I6 and flowmeter I8 are sequentially provided with appendix I, the gas outlet of helium steel cylinder 5 is connected through appendix II21 with another air inlet of storage tank 10, and helium purity is 99.999% in helium steel cylinder 5；Ball valve II7 and flowmeter II9 are sequentially provided with appendix II；The gas outlet of storage tank 10 is connected through air injection pipe 23 with the gas injection steel pipe 16 in air injector well 1, ball valve III11, flowmeter III12, pressure gauge 13 and gas injection valve 15 are sequentially provided with air injection pipe 23, in gas injection valve and air injection pipe 23 between pressure gauge through branch road 22 and ball valve
14 connections；The loading line is by small-sized air compressor 18, gas tube 24 and ball valve
19 are constituted, and the gas outlet of small-sized air compressor 18 is connected through gas tube 24 with the inflatable interface 4.18 of intumescent gas barriers 4, and gas tube 24 is provided with ball valve
19。
It is shown in Figure 3, the air injector well 1 is made up of air injector well well casing 25 and packed layer, air injector well well casing 25, material be chemical grade UPVC, air injector well well casing sealed bottom, precipitation pipeline section 25.3, sieve tube segment 25.2 and straight length 25.1 are followed successively by from bottom to top；Sediment tube 30~50cm of segment length, sieve tube segment is arranged at below target stains area at 0.3~1.5m, sieve tube segment slit width 0.05mm, stitches spacing 1cm, length is 0.3m-1.5m；Straight length upper end is extended to more than ground, the packed layer is made up of quartzy sand filter blanket 26, bentonite bed 27 and concrete layer 28, quartzy sand filter blanket 6 is filled in around sieve tube segment 25.2, its upper and lower ends at least grows 30cm than sieve tube segment, the part of bentonite bed 27 is filled between quartzy sand filter blanket 26 and concrete layer 28, its top surface is flushed with the aquiclude upper end of rock stratum, another part is filled in quartzy sand filter blanket 26 between air injector well foot of hole, and concrete layer 28 is filled in bentonite bed 27 between ground 36.
It is shown in Figure 4, the groundwater monitoring well 2 is made up of groundwater monitoring well well casing 30, well cap 29 with packed layer, the material of groundwater monitoring well well casing 30 is chemical grade UPVC, the sealed bottom of groundwater monitoring well well casing 30, precipitation pipeline section 30.3, sieve tube segment 30.2 and the part of straight length 30.1 3 are followed successively by from bottom to top；The precipitation pipeline section 30.3 grows 30~50cm, and sieve tube segment 30.2 is positioned in the range of target stains area, and length disclosure satisfy that the variation in target stains area caused by SEA LEVEL VARIATION, and straight length 30.1 extends upwardly to ground, its top capping pipe cap 24；The packed layer is made up of quartzy sand filter blanket 26, bentonite bed 27 and concrete layer 28, quartzy sand filter blanket 26 is filled in around sieve tube segment 30.2, its upper and lower ends at least grows 30cm than sieve tube segment, the part of bentonite bed 27 is filled between quartzy sand filter blanket 26 and concrete layer 28, its top surface is flushed with the aquiclude upper end of rock stratum, another part is filled in quartzy sand filter blanket 26 between groundwater monitoring well foot of hole, and concrete layer 28 is filled in bentonite bed 27 between ground 36.Groundwater monitoring well shaft building needs to be managed with Beile or other well washing equipment well-flushings after terminating, and until the water quality parameter value stabilization such as the pH value of underground water, electrical conductivity, oxidation-reduction potential, dissolved oxygen, turbidity, water temperature, well-flushing terminates.
It is shown in Figure 5, the SOIL GAS monitoring well 3 is by SOIL GAS probe 34, soft air-guide pipe 33, quick-connecting valve 32, pillar 31, pipe cap 29 and packed layer are constituted, the SOIL GAS probe 34 uses material for chemical grade UPVC, external diameter 25mm, interval is cracked on its tube wall, slit width 0.5mm, stitch spacing 5mm, length at least 0.15m, the material of soft air-guide pipe 33 is PVC hose, external diameter 10mm, the lower end of soft air-guide pipe 33 is stretched into inside SOIL GAS probe 34, upper end is above the ground level at least 30cm and to be connected with quick-connecting valve 32 above the ground, pillar 31 is cased with the outside of quick-connecting valve, the bottom of pillar 31 is embedded in 20cm in concrete layer 28, top, which is elevated above the soil, is not less than 30cm, there is pipe cap 29 on pillar；The packed layer is made up of quartzy sand filter blanket 26, bentonite bed 27 and concrete layer 28, quartzy sand filter blanket 26 is filled in around SOIL GAS probe 34, its upper and lower ends at least grows 30cm than SOIL GAS probe 34, the part of bentonite bed 27 is filled between quartzy sand filter blanket 26 and concrete layer 28, its top surface is flushed with the aquiclude upper end of rock stratum, another part is filled in quartzy sand filter blanket 26 between SOIL GAS monitoring well foot of hole, and concrete layer 28 is filled in bentonite bed 27 between ground 36.
Referring to shown in Fig. 6~8; the intumescent gas barriers include the main air injection pipe 4.7 being connected with gas injection steel pipe 16; the packing element assembly 4.6 of elastic material is cased with main air injection pipe, main air injection pipe 4.7 is also cased with one group of packing element joint, protective case, transition joint, adapter sleeve in the symmetrical above and below of packing element assembly respectively；The upper orifice of the packing element assembly 4.6 is placed on packing element joint I4.5 lower outsides; protective case I4.4 be placed on the outside of the upper orifice of packing element assembly 4.6 simultaneously with clamping in the middle part of packing element joint I4.5 outer walls; transition joint I4.3 is placed on packing element joint I4.5 upper outsides, and adapter sleeve I4.2 is connected between transition joint I4.3 and top connection 4.1；Gas injection cavity 4.15 is enclosed between top connection 4.1, adapter sleeve I4.2, transition joint I4.3 and the outer wall of main air injection pipe 4.7, and leave gas passage 4.16 between both transition joint I4.3 and packing element joint I4.5 and the main outer wall of air injection pipe 4.7, gas passage one end connection gas injection cavity 4.15, the other end connects the space between main air injection pipe 4.7 and packing element assembly 4.6；Top connection 4.1, which is provided with, to be used to make the upper interface 4.19 that main air injection pipe 4.7 is connected with gas injection steel pipe 16, and it is provided with inflatable interface 4.18 on the upper side of interface 4.19, inflatable interface upper end is connected with external inflation pipe 17, and the lower end of inflatable interface 4.18 is extended downwardly to be connected with gas injection cavity 4.15；The lower nozzle of the packing element assembly 4.6 is placed on packing element joint II4.13 upper outsides; protective case II4.12 be placed on the outside of the lower nozzle of packing element assembly 4.6 simultaneously with clamping in the middle part of packing element joint II4.13 outer walls; transition joint II4.11 is placed on packing element joint II4.13 lower outsides; adapter sleeve II4.10 is connected between transition joint II4.11 and box cupling 4.8, the connection lower contact 4.9 of the lower end of box cupling 4.8；Both packing element joint II4.13 and transition joint II4.11 are closely placed on the main outer wall of air injection pipe 4.7.
The packing element assembly 4.6 is quality of rubber materials, and the material of the device remaining part is 35CrMo structural alloy steels；The upper orifice inwall of packing element assembly 4.6 is provided with the inner groovy for being used for accommodating packing element joint I4.5 bottoms, and upper orifice outer wall is provided with the external groove for being used for accommodating protective case I4.4；The lower nozzle of the packing element assembly 4.6 is identical with upper orifice shape.
The transition joint I4.3 is with being provided with groove and being provided with sealing ring 4.14 on packing element joint I4.5 and adapter sleeve I4.2 contact surface, top connection 4.1 is with being provided with groove and provided with sealing ring 4.14 on the contact surface of adapter sleeve I4.2 and the outer wall of main air injection pipe 4.7；
The transition joint II4.11 is with being provided with groove and being provided with sealing ring 4.14 on the contact surface of packing element joint II4.13, adapter sleeve II4.10 and the outer wall of main air injection pipe 4.7, box cupling 4.8 is with being provided with groove and provided with sealing ring 4.14 on the contact surface of adapter sleeve II4.10 and the outer wall of main air injection pipe 4.7；
The transition joint I4.3 inwalls are step-like in what is coordinated each other with packing element joint I4.5 shaped upper parts, and transition joint I4.3 outer walls top and the outer wall bottom of top connection 4.1 are respectively provided with the groove for accommodating adapter sleeve I4.2；
The transition joint II4.11 inwalls are step-like in what is coordinated each other with packing element joint II4.13 shaped upper parts, and transition joint II4.11 outer walls bottom and the outer wall top of box cupling 4.8 are respectively provided with the groove for accommodating adapter sleeve II4.10.
Suitable for reading are provided with the middle part of interior edge, packing element joint I4.5 outer walls of the protective case I4.4 has flange, protective case I4.4 interior edge and the flange clamping on packing element joint I4.5；
The lower mouth of the protective case II4.12, which is provided with the middle part of interior edge, packing element joint II4.13 outer walls, flange, protective case II4.12 interior edge and the flange clamping on packing element joint II4.12.
Shown in Figure 9, the upper interface 4.19 of the main air injection pipe 4.7 and top connection 4.1 is set for the eccentric, and inflatable interface 4.18 is located at upper side of the interface 4.19 away from top connection center.
The air injecting method of volatile organic contaminant in this in-situ remediation of underground water, step is as follows：
Step 1: by site investigation, obtaining place hydrogeological parameter and pollution condition, the feasibility of preliminary judgement technology application；Place hydrogeological parameter includes soil types, particle diameter distribution, hydraulic conductivity, gas permeability, porosity etc.；Pollution condition include groups of contaminants into, whether pollutant property, pollutant is existed only in water table aquifer, if having nonaqueous phase liquid NPALs phase preservations；Following condition must be met simultaneously with technology application feasibility：Not having NAPLs preservations, contaminated underground water to be located at water table aquifer, the lithology in water-bearing layer in water table needs isotropic and particle relatively thick, soil permeability >=1.0 × 10-9cm2, pollutant needs with volatility, the vapour pressure of pollutant at room temperature>0.5mmHg, pollutant boiling point<250 ~ 300 DEG C, the Henry's constant of pollutant>100atm；
Step 2: in selection area, air injector well 1, groundwater monitoring well 2, SOIL GAS monitoring well 3 are laid using direct bore mode, air ejector system 1 is at least provided with one, groundwater monitoring well 2 at least provided with two, SOIL GAS monitoring well 3 at least provided with five；Gas injection system is installed, and the operation of intumescent gas barriers is tested,
First open small-sized air compressor 18, compressed air is set to be entered by the inflatable interface 4.18 of intumescent gas barriers, the space entered again through gas injection cavity 4.15, gas passage 4.16 between main air injection pipe 4.7 and packing element assembly 4.6, and make packing element assembly 4.6 gradually expand to form annular seal space 4.17, finally the borehole wall with air injector well 1 is adjacent to, and plays the iris action with down-hole liquid and gas；When gas injection starts, air compressor 17 is opened, compressed air is delivered to underground water saturation region by gas injection steel pipe 16；At the end of gas injection, air compressor 17 is first closed, small-sized air compressor 18 is turned off, slowly discharges compressed air, after the rubber of packing element assembly 4.6 reverts to original state, intumescent gas barriers 4 are recycled to ground 36；The small-sized air compressor 18 sets outlet pressure as 0.6Mpa, and when pressure is higher than 0.6Mpa, compressor is stopped；When pressure is less than 0.4Mpa, compressor starts work；
Tested Step 3: carrying out the test of underground water dissolved oxygen background, the test of SOIL GAS background, gas injection pressure and flow rate test, groundwater pressure response test, the test of underground water dissolved oxygen, helium tracer flow, SOIL GAS；By gas injection pressure and flow rate test, optimal gas injection pressure, gas flow are obtained；Tested by groundwater pressure response test, the test of underground water dissolved oxygen, helium tracer flow, SOIL GAS, obtain 4 air injection radiuses of influence, final air injects radius of influence scope between the minimum value and maximum of test result；
The underground water dissolved oxygen background test is comprised the following steps that：
Step 5, other groundwater monitoring wells are carried out dissolved oxygen test by repeat step 1~4；
The SOIL GAS background test is comprised the following steps that：
The gas injection pressure is comprised the following steps that with flow rate test：
Step 5, repeat step 3~4, wherein adjusting ball valve
11 opening degree, makes its open degree progressively diminish greatly, injection well head pressure gauge reading Pn is gradually increased, but Pn is no more than Pmax；
The groundwater pressure response test is comprised the following steps that：
Step 5, draw level of ground water in different groundwater monitoring wells 2 and change over time curve map, the corresponding distance of the relatively obvious curve of SEA LEVEL VARIATION is respectively positioned in air injection coverage, wherein farthest distance is the air injection radius of influence；
The underground water dissolved oxygen test is comprised the following steps that：
The helium tracer flow step is as follows：
Step 5, ball valve is closed
14, open gas injection ball valve 15, it is ensured that ball valve
The degree that 14 degree closed are opened with gas injection ball valve 15 is consistent, that is, starts to inject the mixed gas of helium and compressed air into air injector well；
The SOIL GAS test is comprised the following steps that：
Step 4: the radius of influence and gas injection operating mode that are obtained according to test, carry out air injector well arrangement and the laying of air compressor, and set groundwater monitoring well and SOIL GAS monitoring well；According to the radius of influence obtained in test, using etc. trigonometric calculations determine the spacing of air injector well, the line between three adjacent air injector wells is set to constitute an equilateral triangle, ensure to be not present between well and well with this and repair dead angle, air compressor is set to the machine of a well one or the machine of many wells one according to live place and economic budget situation cloth, each air injector well well head must install pressure gauge and flowmeter, and the laying of groundwater monitoring well should follow following principle：First, groundwater monitoring well should cover restoring area upstream, restoring area, restoring area downstream；2nd, depending on the quantity of groundwater monitoring well and distribution are according to project demands and space enrironment；If repairing place with the presence of sensitive bodies such as basement, underground utilities, need to lay SOIL GAS monitoring well near these sensitive bodies；
Step 5: starting before reparation, intumescent gas barriers are inflated by small-sized air compressor before air injection, barrier down-hole liquid and gas, are then turned on air compressor 17 and carry out gas injection reparation to underground water saturation region conveying compressed air；Meanwhile, pollutant concentration in gas injection operating mode, underground water and SOIL GAS is monitored, after pollutant concentration reaches defined reparation desired value, first close air compressor 17, small-sized air compressor 18 is turned off, intumescent gas barriers 4 ground 36 is recycled to, reparation terminates.The incipient stage is repaired, gas injection pressure is carried out to each injector well and is monitored with gas flow, after system run all right, the monitoring frequency of gas injection operating mode can be suitably reduced；, it is necessary to which pollution concentration is detected in underground water before reparation starts；In repair process, underground water pollutant concentration is detected at regular intervals, the removal of underground water pollutant is grasped, pollutant concentration reaches to be still to continue to monitor underground water progress certain time after reparation desired value, it is ensured that underground water pollutant does not rebound；If the pollutant concentration monitored in SOIL GAS monitoring well reaches the degree for causing harm to neighbouring crowd or environment in repair process, then need to set up soil vapor extraction system.
It is as follows using groundwater remediation experimental test result of the present utility model：
Pollutant is mainly volatility benzene, no NAPLs phases preservation；Underground water buried depth is 13.5m, and argillic horizon buried depth 14.5m, water table thickness is 1m, and water-bearing layer lithology is mainly middle sand and fine sand, and infiltration coefficient is natural trend amplitude about 1 ~ 2m in 10m/d, water level year.Air injector well drilling buried depth 15.3m, well casing external diameter is 63mm, precipitates length of tube 0.3m, and air injector well screen casing length 0.5m, screen casing top is located at 0.5m below the water surface；Groundwater monitoring well drilling buried depth 15.3m, well casing external diameter is 63mm, precipitates length of tube 0.3m, and groundwater monitoring well screen length of tube 3.0m, screen casing top is located at water surface above 2m；SOIL GAS monitoring well drilling buried depth 12.0m, SOIL GAS probe external diameter is 25mm, and length is 0.6m, and SOIL GAS probe bottom buried depth is 11.5m.Determine that the optimal gas injection pressure in the place and flow are 0.03MPa, 23.2m by on-the-spot test3/ h, the radius of influence is 5m.
Claims (6)
1. the air ejector system of volatile organic contaminant in a kind of in-situ remediation of underground water, including air feed equipment, air injector well（1）, groundwater monitoring well（2）With SOIL GAS monitoring well（3）, it is characterised in that：The air feed equipment is made up of underground air feed equipment and ground air feed equipment two parts；
Underground air feed equipment includes being located at air injector well（1）Interior gas injection steel pipe（16）With intumescent gas barriers（17）, intumescent gas barriers（17）Installed in gas injection steel pipe（16）Middle and lower part；The intumescent gas barriers include and gas injection steel pipe（16）The main air injection pipe of connection（4.7）, the packing element assembly of elastic material is cased with main air injection pipe（4.6）, main air injection pipe（4.7）Also it is cased with one group of packing element joint, protective case, transition joint, adapter sleeve in the symmetrical above and below of packing element assembly respectively；The packing element assembly（4.6）Upper orifice be placed on packing element joint I（4.5）Lower outside, protective case I（4.4）It is placed on packing element assembly（4.6）Upper orifice on the outside of simultaneously with packing element joint I（4.5）Clamping in the middle part of outer wall, transition joint I（4.3）It is placed on packing element joint I（4.5）Upper outside, adapter sleeve I（4.2）It is connected to transition joint I（4.3）With top connection（4.1）Between；Top connection（4.1）, adapter sleeve I（4.2）, transition joint I（4.3）With main air injection pipe（4.7）Gas injection cavity is enclosed between outer wall（4.15）, and in transition joint I（4.3）With packing element joint I（4.5）The two is with main air injection pipe（4.7）Gas passage is left between outer wall（4.16）, gas passage one end connection gas injection cavity（4.15）, the main air injection pipe of other end connection（4.7）With packing element assembly（4.6）Between space；Top connection（4.1）Being provided with is used to make main air injection pipe（4.7）With gas injection steel pipe（16）The upper interface of connection（4.19）, and in upper interface（4.19）Side is provided with inflatable interface（4.18）, inflatable interface upper end and external inflation pipe（17）Connection, inflatable interface（4.18）Lower end is extended downwardly and gas injection cavity（4.15）It is connected；The packing element assembly（4.6）Lower nozzle be placed on packing element joint II（4.13）Upper outside, protective case II（4.12）It is placed on packing element assembly（4.6）Lower nozzle on the outside of simultaneously with packing element joint II（4.13）Clamping in the middle part of outer wall, transition joint II（4.11）It is placed on packing element joint II（4.13）Lower outside, adapter sleeve II（4.10）It is connected to transition joint II（4.11）With box cupling（4.8）Between, box cupling（4.8）Lower end connects lower contact（4.9）；Packing element joint II（4.13）With transition joint II（4.11）The two is closely placed on main air injection pipe（4.7）Outer wall；
Ground air feed equipment includes and gas injection steel pipe（16）The gas injection pipeline of connection, and with intumescent gas barriers（4）Inflatable interface（4.18）The loading line of connection；The air injection pipe route air compressor（17）, helium steel cylinder（5）, storage tank（10）, appendix, air injection pipe, gas injection valve, ball valve, flowmeter and pressure gauge constitute；Air compressor（17）Gas outlet through appendix I（20）With storage tank（10）The connection of an air inlet, be sequentially provided with ball valve I on appendix I（6）With flowmeter I（8）, helium steel cylinder（5）Gas outlet through appendix II（21）With storage tank（10）The connection of another air inlet, be sequentially provided with ball valve II on appendix II（7）With flowmeter II（9）；Storage tank（10）Gas outlet through air injection pipe（23）With air injector well（1）Interior gas injection steel pipe（16）Connection, air injection pipe（23）On be sequentially provided with ball valve III（11）, flowmeter III（12）, pressure gauge（13）With gas injection valve（15）, in gas injection valve and the air injection pipe between pressure gauge（23）Through branch road（22）With ball valve
（14）Connection；The loading line is by small-sized air compressor（18）, gas tube（24）And ball valve
（19）Constitute, small-sized air compressor（18）Gas outlet through gas tube（24）With intumescent gas barriers（4）Inflatable interface（4.18）Connection, gas tube（24）It is provided with ball valve（19）；
The air injector well（1）By air injector well well casing（25）Constituted with packed layer, air injector well well casing sealed bottom, air injector well well casing is followed successively by precipitation pipeline section from bottom to top（25.3）, sieve tube segment（25.2）And straight length（25.1）；Sediment tube 30~50cm of segment length, sieve tube segment is arranged at below target stains area at 0.3~1.5m, and straight length upper end is extended to more than ground, and the packed layer is by quartzy sand filter blanket（26）, bentonite bed（27）And concrete layer（28）Constitute, quartzy sand filter blanket（6）It is filled in sieve tube segment（25.2）Around, its upper and lower ends at least grows 30cm, bentonite bed than sieve tube segment（27）A part is filled in quartzy sand filter blanket（26）With concrete layer（28）Between, its top surface is flushed with the aquiclude upper end of rock stratum, and another part is filled in quartzy sand filter blanket（26）To between air injector well foot of hole, concrete layer（28）It is filled in bentonite bed（27）To ground（36）Between；
The groundwater monitoring well（2）By groundwater monitoring well well casing（30）, well cap（29）Constituted with packed layer, the groundwater monitoring well well casing（30）Sealed bottom, groundwater monitoring well well casing is followed successively by precipitation pipeline section from bottom to top（30.3）, sieve tube segment（30.2）And straight length（30.1）Three parts；The precipitation pipeline section（30.3）Long 30~50cm, sieve tube segment（30.2）It is positioned in the range of target stains area, length disclosure satisfy that the variation in target stains area caused by SEA LEVEL VARIATION, straight length（30.1）Ground is extended upwardly to, its top capping pipe cap（24）；The packed layer is by quartzy sand filter blanket（26）, bentonite bed（27）And concrete layer（28）Constitute, quartzy sand filter blanket（26）It is filled in sieve tube segment（30.2）Around, its upper and lower ends at least grows 30cm, bentonite bed than sieve tube segment（27）A part is filled in quartzy sand filter blanket（26）With concrete layer（28）Between, its top surface is flushed with the aquiclude upper end of rock stratum, and another part is filled in quartzy sand filter blanket（26）To between groundwater monitoring well foot of hole, concrete layer（28）It is filled in bentonite bed（27）To ground（36）Between；
The SOIL GAS monitoring well（3）Popped one's head in by SOIL GAS（34）, soft air-guide pipe（33）, quick-connecting valve（32）, pillar（31）, pipe cap（29）Constituted with packed layer, the SOIL GAS probe（34）Tube wall on be spaced and crack, the soft air-guide pipe（33）SOIL GAS probe is stretched into lower end（34）Inside, upper end be above the ground level at least 30cm and with quick-connecting valve above the ground（32）It is connected, pillar is cased with the outside of quick-connecting valve（31）, have pipe cap on pillar（29）；The packed layer is by quartzy sand filter blanket（26）, bentonite bed（27）And concrete layer（28）Constitute, quartzy sand filter blanket（26）It is filled in SOIL GAS probe（34）Around, its upper and lower ends is at least popped one's head in than SOIL GAS（34）Grow 30cm, bentonite bed（27）A part is filled in quartzy sand filter blanket（26）With concrete layer（28）Between, its top surface is flushed with the aquiclude upper end of rock stratum, and another part is filled in quartzy sand filter blanket（26）To between SOIL GAS monitoring well foot of hole, concrete layer（28）It is filled in bentonite bed（27）To ground（36）Between.
2. the air ejector system of volatile organic contaminant in in-situ remediation of underground water according to claim 1, it is characterised in that：The air injector well well casing（25）, groundwater monitoring well well casing（30）, SOIL GAS probe（34）The material of shell is chemical grade UPVC, soft air-guide pipe（33）Material be PVC.
3. the air ejector system of volatile organic contaminant in in-situ remediation of underground water according to claim 1, it is characterised in that：The packing element assembly（4.6）For quality of rubber materials, the material of the device remaining part is 35CrMo structural alloy steels；Packing element assembly（4.6）Upper orifice inwall be provided be used for accommodate packing element joint I（4.5）The inner groovy of bottom, upper orifice outer wall, which is provided with, to be used to accommodate protective case I（4.4）External groove；The packing element assembly（4.6）Lower nozzle it is identical with upper orifice shape.
4. the air ejector system of volatile organic contaminant in in-situ remediation of underground water according to claim 1, it is characterised in that：The main air injection pipe（4.7）And top connection（4.1）Upper interface（4.19）It is set for the eccentric, inflatable interface（4.18）Positioned at upper interface（4.19）Side away from top connection center.
5. the air ejector system of volatile organic contaminant in in-situ remediation of underground water according to claim 1, it is characterised in that：The transition joint I（4.3）With packing element joint I（4.5）And adapter sleeve I（4.2）Contact surface on be provided with groove and provided with sealing ring（4.14）, top connection（4.1）With adapter sleeve I（4.2）And main air injection pipe（4.7）Groove is provided with the contact surface of outer wall and provided with sealing ring（4.14）；
The transition joint II（4.11）With packing element joint II（4.13）, adapter sleeve II（4.10）And main air injection pipe（4.7）Groove is provided with the contact surface of outer wall and provided with sealing ring（4.14）, box cupling（4.8）With adapter sleeve II（4.10）And main air injection pipe（4.7）Groove is provided with the contact surface of outer wall and provided with sealing ring（4.14）；
The transition joint I（4.3）Inwall is and packing element joint I（4.5）Shaped upper part is in step-like, the transition joint I coordinated each other（4.3）Outer wall top and top connection（4.1）Outer wall bottom is respectively provided with receiving adapter sleeve I（4.2）Groove；
The transition joint II（4.11）Inwall is and packing element joint II（4.13）Shaped upper part is in step-like, the transition joint II coordinated each other（4.11）Outer wall bottom and box cupling（4.8）Outer wall top is respectively provided with receiving adapter sleeve II（4.10）Groove.
6. the air ejector system of volatile organic contaminant in in-situ remediation of underground water according to claim 1, it is characterised in that：The protective case I（4.4）It is suitable for reading be provided with interior edge, packing element joint I（4.5）There are flange, protective case I in the middle part of outer wall（4.4）Interior edge and packing element joint I（4.5）On flange clamping；
The protective case II（4.12）Lower mouth be provided with interior edge, packing element joint II（4.13）There are flange, protective case II in the middle part of outer wall（4.12）Interior edge and packing element joint II（4.12）On flange clamping.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120561733 CN202379856U (en) | 2011-12-29 | 2011-12-29 | Air injection system for remedying volatile organic pollutants in underground water in situ |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120561733 CN202379856U (en) | 2011-12-29 | 2011-12-29 | Air injection system for remedying volatile organic pollutants in underground water in situ |
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| CN202379856U true CN202379856U (en) | 2012-08-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491603A (en) * | 2011-12-29 | 2012-06-13 | 北京市环境保护科学研究院 | Air injection system and method for in situ restoration of volatile pollutant in underground water |
| CN103043862A (en) * | 2012-12-30 | 2013-04-17 | 苏州唯盛环境修复科技有限公司 | Underground water pollution in-situ restoration device based on synchronous shattering and hydrodynamic circulating |
| CN103691735A (en) * | 2013-12-26 | 2014-04-02 | 江苏盖亚环境工程有限公司 | Nested liquid-separarted dripping device for soil remediation |
| CN108314106A (en) * | 2014-12-24 | 2018-07-24 | 环境保护部南京环境科学研究所 | A kind of underground water in-situ remediation method polluted by DNAPL |
| CN116989866A (en) * | 2023-09-27 | 2023-11-03 | 三峡金沙江云川水电开发有限公司 | Hydropower station upstream water reservoir water level monitoring device |
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2011
- 2011-12-29 CN CN 201120561733 patent/CN202379856U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491603A (en) * | 2011-12-29 | 2012-06-13 | 北京市环境保护科学研究院 | Air injection system and method for in situ restoration of volatile pollutant in underground water |
| CN103043862A (en) * | 2012-12-30 | 2013-04-17 | 苏州唯盛环境修复科技有限公司 | Underground water pollution in-situ restoration device based on synchronous shattering and hydrodynamic circulating |
| CN103691735A (en) * | 2013-12-26 | 2014-04-02 | 江苏盖亚环境工程有限公司 | Nested liquid-separarted dripping device for soil remediation |
| CN108314106A (en) * | 2014-12-24 | 2018-07-24 | 环境保护部南京环境科学研究所 | A kind of underground water in-situ remediation method polluted by DNAPL |
| CN108314106B (en) * | 2014-12-24 | 2020-12-29 | 环境保护部南京环境科学研究所 | DNAPL (deoxyribonucleic acid-styrene-acrylonitrile copolymer) polluted underground water in-situ remediation method |
| CN116989866A (en) * | 2023-09-27 | 2023-11-03 | 三峡金沙江云川水电开发有限公司 | Hydropower station upstream water reservoir water level monitoring device |
| CN116989866B (en) * | 2023-09-27 | 2023-12-08 | 三峡金沙江云川水电开发有限公司 | Hydropower station upstream water reservoir water level monitoring device |
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