TW201725301A - Multilayer well casing - Google Patents

Abstract

The presnt invention relates to a multilayer well casing. The multilayer well casing includes an outer tube, an inner tube, packed cartridges, a first blocking unit, a second blocking unit, a pump, a plurality of stripping plates and a gas introducing tube. A tube wall of the inner tube has screen areas, and a screen depth of every screen areas is not higher than a groundwater level. The packed cartridges are disposed between the outer tube and the inner tube. The first blocking unit and the second blocking unit are disposed in the inner tube, and a pumped area is defined between them. A disposed depth of the second blocking unit is lower than a disposed depth of the first blocking unit. An effluent hole of the pump is disposed in a top of the inner tube. Stripping plates are disposed between the effluent hole and the groundwater level. An introducing hole of the gas introducing tube is disposed between the groundwater level and the first blocking unit.

Description

Multi-layer well pipe

The invention relates to a well pipe, in particular to a multi-layer well pipe which can improve the remediation efficiency and maintenance convenience of groundwater.

Common environmental pollution includes soil pollution and groundwater pollution. Soil pollution and groundwater pollution are mostly pollutants that penetrate into soil and/or groundwater through various pipelines. Depending on the characteristics of the pollutants, the soil structure and the site conditions, the pollutants that penetrate into the soil and/or groundwater will penetrate into the aquifer, making the environmental pollution more serious.

Conventional contaminants are mostly non-aqueous organic compounds that are not readily soluble in water or slightly soluble in water. Accordingly, when the pollutants penetrate into the groundwater layer, the pollutants form a separate liquid phase, making the groundwater remediation quite difficult and complicated. Wherein, if the density of the contaminant is larger than water, the formed liquid phase is called Dense Non-aqueous Phase Liquid (DNAPL).

Remediation of groundwater is generally done by installing well pipes on the ground and pumping groundwater. After being processed by the processing equipment, the treated groundwater is returned to the well. Although this method can effectively remove the pollutants in the groundwater, the processing equipment must be additionally set, and the equipment cost is also greatly increased. Second, does the groundwater have The characteristics can be restored, so if the geological structure is not investigated, the groundwater extracted will not easily return to the aquifer.

In order to solve the defects caused by the aforementioned processing equipment, the reaction materials are directly put into the well pipe to replace the conventional processing equipment. Although the reactive substance can effectively remove the pollutants in the groundwater, the user can easily collect the reaction substance at the sampling stage, thereby reducing the accuracy of the sampling, thereby reducing the efficiency of the treatment. If the sampling well and the reaction well are separated separately, the labor cost is relatively increased, and the benefit is reduced. Moreover, the well pipe to which the reaction substance is added consumes a large amount of water during cleaning, and wastes resources.

In addition, the well pipe of the well pipe tends to accumulate microorganisms, and blocks the well screen, thereby reducing the effect of removing pollutants.

In view of this, it is not necessary to provide a multilayer well pipe to improve the drawbacks of conventional multilayer well pipes.

Therefore, an aspect of the present invention is to provide a multi-layer well pipe which is capable of forming a circulating flow field by a plurality of well pipes and a screen opening area, thereby improving the efficiency of groundwater remediation.

According to one aspect of the invention, a multi-layer well tubular is proposed. The multi-layer well pipe comprises an outer tube, an inner tube, a plurality of filling tubes, a first blocking unit, a second blocking unit, a pump, at least one stripping plate and a first gas introduction tube. The inner tube is disposed in the outer tube, wherein the tube wall of the inner tube has at least one first screening area, and the first opening depth of each of the first screening areas is not higher than the water table.

The filling tube is disposed between the outer tube and the inner tube, wherein each filling tube is provided with a plurality of filling materials, and the filling height of the filling materials is not lower than the water table.

The first blocking unit is disposed in the inner tube, and the first opening depth of one of the first screening areas is higher than the set depth of the first blocking unit. The second blocking unit is disposed in the inner tube, and the second blocking unit is disposed at a depth lower than a set depth of the first blocking unit. Wherein, the first blocking unit and the second blocking unit define a pumping area, and the wall of the inner tube corresponding to the level of the pumping area has the other one of the first screening areas.

The pump contains pumping lines and output lines. The pumping line is connected to the pump, and the pumping port of the pumping line is arranged in the pumping area. The output line is connected to the pump, and the outlet of the output line is placed at the top of the inner tube.

One end of each stripping plate is disposed on the wall of the inner tube, and the other end is at a distance from the wall of the inner tube, wherein each stripping plate is disposed between the water outlet and the water table.

The inlet of the first gas introduction pipe is disposed between the water table and the first blocking unit.

According to an embodiment of the invention, the first screening depth of the other of the first screening regions is lower than the set depth of the second blocking unit.

According to another embodiment of the present invention, the wall of the outer tube has at least one second screening area, and the second opening depth of each of the second screening areas is not higher than the water table.

According to still another embodiment of the present invention, the opening positions of each of the first screening areas are horizontally corresponding to the opening positions of each of the second screening areas.

According to still another embodiment of the present invention, the aforementioned filling tube surrounds the inner tube.

According to still another embodiment of the present invention, the pump further includes a spray element, and the spray element is connected to the water outlet, wherein the spray element has a plurality of water spray holes.

According to still another embodiment of the present invention, at least a portion of the filler material is a reactive material and/or an adsorbent material.

According to still another embodiment of the present invention, the multi-layer well pipe further includes a second gas introduction pipe, and the introduction port of the second gas introduction pipe is disposed in the pumping area.

According to still another embodiment of the present invention, the second gas introduction pipe is in communication with the first gas introduction pipe.

According to still another embodiment of the present invention, the plurality of stripping plates are plural, and the stripping plates are not parallel to each other.

The multi-layer well pipe of the present invention is constructed by separating a pumping area by a multi-layer well pipe, a first blocking unit and a second blocking unit, and adjusting the grounding area of the inner pipe wall of the multi-layer well pipe to form groundwater. Circulating the flow field and improving the remediation efficiency of groundwater. Secondly, a stripping plate, a gas introduction pipe and/or a spraying component are arranged in the multi-layer well pipe to increase the contact area between the liquid phase and the gas phase in the multi-layer well pipe, thereby improving the removal efficiency of the pollutant.

100/200‧‧‧Multi-layer well pipe

100a/200a‧‧‧ ground

101/201‧‧‧Water table

101a‧‧‧ Height

110/210‧‧‧External management

111/211/121‧‧‧ wall

120/220‧‧‧Inside

123/125/127/223/225/227‧‧‧First screening area

123a/125a/127a‧‧‧first screening depth

130/230‧‧‧ Filling tube

131‧‧‧Filling materials

131a‧‧‧fill height

140/240‧‧‧first barrier unit

140a/150a‧‧‧Set depth

150‧‧‧Second blocking unit

160/260‧‧‧ pumping area

170/270‧‧‧

171/271‧‧‧ pumping line

171a/271a‧‧ ‧ water outlet

173/273‧‧‧Output line

173a/273a‧‧ ‧ water outlet

180/280‧‧‧ stripper

180a/280a‧‧‧ vents

190/290‧‧‧ gas supply unit

191/291‧‧‧First gas introduction tube

191a/292a‧‧‧Import

193‧‧‧ gas

213/215/217‧‧‧Second screening area

213a/215a/217a‧‧‧Second screening depth

275‧‧‧Spray components

292‧‧‧Second gas introduction tube

For a more complete understanding of the embodiments of the invention and the advantages thereof, reference should be made to the description below and the accompanying drawings. It must be emphasized that the various features are not drawn to scale and are for illustrative purposes only. The related drawings are described as follows: [Fig. 1a] is a plan view showing a multilayer well pipe according to an embodiment of the present invention.

1b is a partial cross-sectional view taken along the axis of the multi-layer well pipe when the multi-layer well pipe according to an embodiment of the present invention is placed on the ground.

2 is a partial cross-sectional view showing a multilayer well pipe according to another embodiment of the present invention when it is placed on the ground.

The making and using of the embodiments of the invention are discussed in detail below. However, it will be appreciated that the embodiments provide many applicable inventive concepts that can be implemented in a wide variety of specific content. The specific embodiments discussed are illustrative only and are not intended to limit the scope of the invention.

1a and 1b, wherein FIG. 1a is a plan view of a multi-layer well pipe according to an embodiment of the present invention, and FIG. 1b illustrates a multi-layer well pipe disposed on the ground according to an embodiment of the present invention. , a partial cross-sectional view taken along the axis of the multilayer well pipe. In one embodiment, the multilayer well pipe 100 includes an outer tube 110, an inner tube 120, a plurality of filling tubes 130, a first blocking unit 140, a second blocking unit 150, a pump 170, at least one stripping plate 180, and a gas supply unit. 190.

The inner tube 120 is disposed in the outer tube 110, and the inner tube 120 and the outer tube 110 are concentrically disposed. The filling tube 130 is disposed between the inner tube 120 and the outer tube 110. In an embodiment, the filling tubes 130 may be disposed between the inner tube 120 and the outer tube 110 at intervals. In another embodiment, the fill tubes 130 completely surround the inner tube 120 along the outer perimeter of the inner tube 120.

Each of the filling tubes 130 is provided with a plurality of filling materials 131, and at least a portion of the filling material 131 may include a reactive material and/or an adsorbing material. In one embodiment, the filler material 131 can be a chemical agent, an oxidizing agent, a bio-aid, an adsorbent material, a sustained-release material, an additive for water treatment, other suitable materials, or any mixture of the above materials.

With the bottom end of the filling tube 130 as a reference point, the filling height 131a of the filling material 131 is not lower than the height 101a of the water table 101.

In order to allow the groundwater to circulate, the wall of the filling tube 130 of the present invention may be completely screened. However, the filling material 131 in the filling tube 130 does not leak out of the opening area of the tube wall of the filling tube 130.

The filling tube 130 of the present invention is replaceable. Therefore, according to the service life of the filling material 131, the user can replace any filling tube 130 and replace the filling material 131 to improve the effectiveness of the multi-layer well tube 100 in remediating the groundwater.

Referring to FIG. 1b, the tube wall 121 of the inner tube 120 has at least one first screening area 123, 125 and 127, and each of the first screening areas 123, 125 or 127 has a first screening depth. 123a, 125a or 127a are not higher than the water table 101. Wherein, for convenience of explanation, the first screening area 123, 125 or 127 has a first screening depth 123a, 125a or 127a The distance from the ground 100a to the midpoint of the first screening area 123, 125 or 127, respectively.

It should be particularly noted that the first screening depth 123a, 125a or 127a of the first screening area 123, 125 or 127 may also be higher than the water table 101, although higher than the first opening area 123 of the water table 101, 125 or 127 does not further improve the effectiveness of the multi-layer well pipe 100 in remediating the groundwater, but it can use the uniform inner tube 120 to improve the ease of manufacture of the inner tube 120.

The first blocking unit 140 is disposed in the inner tube 120. The first opening depth 123a of the first screening area 123 is higher than the setting depth 140a of the first blocking unit 140, and the setting depth 140a is not higher than the water table 101. The depth 140a is set to represent the distance from the ground 100a to the lower edge of the first blocking unit 140. Preferably, the first blocking unit 140 is completely immersed in the groundwater.

The aforementioned second blocking unit 150 is disposed in the inner tube 120. The set depth 150a of the second blocking unit 150 is lower than the set depth 140a of the first blocking unit 140, and the first blocking unit 140 and the second blocking unit 150 may define the pumping area 160. Wherein, the set depth 150a represents the distance from the ground 100a to the upper edge of the second blocking unit 150.

In an embodiment, the first opening depth 127a of the first screening area 127 is lower than the set depth 150a of the second blocking unit 150.

The tube wall 121 of the inner tube 120 horizontally corresponding to the pumping area 160 defined by the first blocking unit 140 and the second blocking unit 150 has another first screening area 125. In an embodiment, along a plane perpendicular to the ground Towards, the length of the first screening zone 125 is equal to or less than the length of the pumping zone 160, and preferably equal to the length of the pumping zone 160.

When the length of the aforementioned first screening zone 125 is equal to the length of the pumping zone 160, groundwater can be more easily drawn into the pumping zone by being drawn into the filling tube 130.

By the replacement of the filling tube 130, the opening area of the filling tube 130 and the first opening areas 123, 125 and 127 of the inner tube 120 can be cleaned, thereby avoiding the clogging caused by microbial aggregation, thereby avoiding The circulating flow field of groundwater during the operation of the multi-layer well pipe described later cannot be formed.

The pump 170 is disposed on the ground 100a, and the pump 170 includes a pumping line 171 and an output line 173. In an embodiment, the pump 170 can be disposed adjacent to the multi-layer well 100 or at a location remote from the multi-layer well 100.

The aforementioned pumping line 171 is connected to the pump 170, and the pumping port 171a of the pumping line 171 is disposed in the aforementioned pumping area 160 to extract groundwater via the pumping line 171. The output line 173 is connected to the pump 170, and the water outlet 173a of the output line 173 is disposed at the top of the inner tube 120.

In another embodiment, the pump 170 can also have a plurality of pumping lines, and the pumping ports of the pumping lines can be disposed in the pumping area of the plurality of multi-layer well pipes to extract the groundwater in each pumping area, and further The unit settings can be reduced.

One end of each of the stripping plates 180 is disposed on the pipe wall 121 of the inner pipe 120, and the other end is spaced apart from the pipe wall 121 of the inner pipe 120. from. In one embodiment, the stripping plates 180 are staggered such that the extracted groundwater can pass through each of the stripping plates 180.

The stripping plate 180 has a plurality of vent holes 180a, and the vent holes 180a allow the gas introduced by the gas supply unit 190 to be described later to pass through the stripping plate 180. Since the stripping plate 180 is disposed between the water outlet 173a of the output line 173 and the water table 101, when ground water flows through each stripping plate 180, the groundwater of the liquid phase can be in contact with the introduced gas to The stripping treatment is carried out, and the pollutants in the groundwater can be removed by the gas, thereby improving the remediation efficiency of the groundwater.

Secondly, by the arrangement of the vent holes 180a, the liquid phase and the gas phase can have more contact areas, thereby improving the removal efficiency of the contaminants.

In another embodiment, the stripping plates 180 are plural and the stripping plates 180 are not parallel to each other.

The gas supply unit 190 is connected to a first gas introduction pipe 191, and the inlet port 191a of the first gas introduction pipe 191 is disposed between the water table 101 and the first barrier unit 140. When the gas 193 is introduced into the groundwater, the groundwater can be aerated by contact between the liquid phase and the gas phase, thereby further enhancing the removal efficiency of the pollutant.

In an embodiment, the gas supply unit 190 introduces nitrogen or air.

In a specific example, the groundwater of the pumping area 160 is drawn into the pumping line 171 via the water pumping port 171a along the direction 171b, and is output to the top of the inner tube 120 via the water outlet 173a along the direction 173b. Of course Thereafter, groundwater can flow through each of the stripping plates 180 and back into the groundwater of the inner tubes 120.

When the groundwater of the pumping area 160 is extracted, the other groundwater may flow into the filling pipe 130 through the bottom end of the filling pipe 130, the first opening area 127, or the first opening area 123, and pass through the inner pipe 120. An open screening zone 125 flows into the pumping zone 160. In this way, the groundwater can form a circulating flow field and enhance the effectiveness of the multi-layer well pipe 100 in remediating the groundwater.

Wherein, by adjusting the set depth of the first blocking unit and the second blocking unit, and the opening depth of the first screening area, the formed circulating flow field can be changed accordingly to form a circulating flow field of different depths.

When the groundwater flows through the foregoing filling tube 130, the filling material 131 of the filling tube 130 can simultaneously decompose and/or filter the pollutants in the groundwater, thereby improving the remediation efficiency of the groundwater.

In an embodiment, in order to further enhance the effectiveness of removing contaminants, the user may also input a reactive agent into the inner tube 120 to remove contaminants from the groundwater. In this embodiment, when the pump 170 draws groundwater, since the first blocking unit 140 separates the groundwater in the inner tube into the pumping area 160 and the indirect pumping area (ie, the inner tube, the groundwater above the first blocking unit 140) Therefore, the reaction agent is not directly extracted by the pumping line 171 of the pump 170, and the accuracy of sampling can be improved.

Next, when the aforementioned groundwater flows through the stripping plate 180, the gas 193 introduced from the introduction port 191a of the gas introduction pipe 191 floats up to the water table and overflows toward the top of the inner pipe 120. Accordingly, gas 193 can flow with The groundwater generated by the stripping plate 180 generates a gas-liquid reaction, and the contact between the gas phase and the liquid phase can further remove the contaminants in the groundwater, thereby improving the remediation efficiency of the groundwater.

In an embodiment, the distance between the first blocking unit 140 and the water table 101 may be 4 meters to 6 meters, and preferably 4.5 meters to 5 meters. When the distance between the first blocking unit 140 and the water table 101 is 4.5 meters to 5 meters, the radius of the multi-layer well pipe 100 affects groundwater can reach 15 meters to 25 meters.

In an embodiment, the distance between the first blocking unit 140 and the second blocking unit 150 (that is, the total height of the pumping area) may be 7 meters to 9 meters, and preferably 7.5 meters to 8 meters. ruler. If the distance between the first blocking unit 140 and the second blocking unit 150 is 7.5 meters to 8 meters, the groundwater of the pumping area 160 is extracted by the pump 170, and the groundwater of the non-pumping area (ie, other areas) is more likely to form a circulation. The flow field helps the diffusion of pollutants in the groundwater, thereby improving the effectiveness of the multi-layer well pipe to remediate the groundwater, and the radius of the multi-layer well pipe 100 affecting groundwater can reach 15 meters to 25 meters.

Referring to FIG. 2, a partial cross-sectional view of a multi-layer well pipe according to another embodiment of the present invention is disposed on the ground. In one embodiment, the structure of the multilayer well tubular 200 is substantially the same as the structure of the multilayer well tubular 100, the difference being the structure of the outer tubular 210, the pump 270 further comprising a spray element 275, and the multilayer well tubular 200 further comprising The second gas introduction pipe 292 is described in detail below.

In addition, for convenience of explanation, and clearly illustrating the structure of the outer tube 210, the filling material (not shown) of the filling tube 230 of the multilayer well tube 200 depicted in FIG. 2 is omitted.

The tube wall 211 of the outer tube 210 may have at least one second screening area 213, 215 and 217, and a second opening depth 213a, 215a of each of the second screening areas 213, 215 and 217 and 217a is not higher than the groundwater level 201.

In one embodiment, the opening positions of each of the first screening regions 223, 225, and 227 of the inner tube 220 correspond to the screening positions of each of the second screening regions 213, 215, and 217 of the outer tube 210, respectively. In this embodiment, the groundwater is more likely to form a circulating flow field, and promote the mixed disturbance of the ground water, thereby helping to guide the contact reaction between the pollutant and the reaction substance, thereby reducing the defect of the removal efficiency caused by the uneven distribution of the pollutant. Therefore, the remediation efficiency of groundwater can be improved.

In another embodiment, the opening positions of each of the first screening regions 223, 225, and 227 may not correspond to the screening positions of each of the second screening regions 213, 215, and 217. In this embodiment, the flow path of the groundwater is long, and the contact time of the groundwater with the filling material of the filling tube 230 can be increased. In addition, depending on the state of the hydrogeology, the thickness of the filler material (i.e., the diameter of the fill tube 230) may also be adjusted as appropriate to increase or decrease the contact time of the groundwater with the fill material of the fill tube 230.

The pump 270 of the multi-layer well tubular 200 can optionally include a spray element 275, and the spray element 275 can be coupled to the water outlet 273a of the output line 273, wherein the spray element 275 has a plurality of sprinklers (not shown) to enable The groundwater is sprayed through the spray element 275 in a plurality of fine water columns instead of being directly sprayed directly from a single water column, thereby increasing the contact area between the gas phase and the liquid phase, thereby improving the removal efficiency of the pollutants.

The multi-layer well pipe 200 can also optionally include a second gas introduction pipe 292, and the second gas introduction pipe 292 is in communication with the first gas introduction pipe 291, so that the gas supplied from the gas supply unit 290 can simultaneously flow through the second gas. The introduction tube 292 and the first gas introduction tube 291. The introduction port 292a of the second gas introduction pipe 292 is provided in the pumping area 260.

When the inlet 292a is disposed in the pumping zone 260, the introduced gas can disturb the groundwater of the pumping zone 260, promote the mixing of the groundwater in the pumping zone 260, and aerate the groundwater to enhance the removal efficiency of the pollutant. .

In an embodiment, the second gas introduction tube 292 can also be directly connected to the gas supply unit 290 (that is, the second gas introduction tube 292 does not communicate with the first gas introduction tube 291), so that the gas passes through the first flow at different flows. The gas introduction pipe 291 and the second gas introduction pipe 292 are introduced between the water table 201 and the first blocking unit 240 and the pumping area 260. In another embodiment, the second gas introduction pipe 292 can be connected to another gas supply unit, and the first gas introduction pipe 291 and the second gas introduction pipe 292 are respectively introduced into different gases to improve the efficiency of rectifying the groundwater.

In one embodiment, the groundwater of the pumping zone 260 is drawn into the pumping line 271 via the pumping port 271a along the direction 271b and sprayed through the sprinkling hole of the spray element 275. Groundwater then flows through each stripping plate 280 and back into the groundwater of the inner tube 220.

Similarly, when the groundwater of the pumping zone 260 is extracted, the other groundwater will pass through the bottom end of the filling pipe 230, the second screening zone 213, 215 and 217 of the outer pipe 210, and the first screening zone of the inner pipe 220. 223 and 227 flow into the fill tube 230 and flow into the pumping zone 260 via the open screen region 225 of the inner tube 220.

According to the foregoing description, when the pumping line 271 draws groundwater, the groundwater will form a circulating flow field along the directions 200b and 200c, and enhance the effectiveness of the multi-layer well pipe 200 in remediating the groundwater.

Wherein, when the opening positions of the first screening regions 223, 225 and 227 correspond to the screening positions of the second screening regions 213, 215 and 217, most of the groundwater is affected by the filling material in the filling tube 230. The second screening area 213, 215, and 217 will flow horizontally through the filling material, and the first screening area 223, 225, and 227 will flow out of the multi-layer well tube, and a small portion of the ground water will be from the second screening area 213. , 215 and 217 flow into the fill tube 230 and pass vertically through the fill material.

The following examples are used to illustrate the application of the present invention, and are not intended to limit the present invention, and various modifications and refinements can be made without departing from the spirit and scope of the invention.

Example

After the results of the geological survey, the depth of the groundwater level is 4 meters, and the depth of the first layer of impervious layer is 12 meters.

Next, the outer tube diameter of the multilayer well pipe of the embodiment is 6.10 meters (20 inches), and the inner tube diameter is 4.88 meters (16 inches). The filling tube is filled with a reactive material such as activated carbon or a sustained-release material.

The wall of the outer tube is designed to be fully open and has a screening depth of 4 to 12 meters. The inner wall of the inner tube is designed to be layered and sieved, wherein the depth of the top opening is 4 meters to 6 meters, the depth of the middle part is 7 meters to 8 meters, and the depth of the bottom opening is 10 Metric to 12 meters.

In the inner tube, the unscreened portions (ie, depths of 6 meters to 7 meters and 8 meters to 10 meters) are respectively provided with a first blocking unit and a second blocking unit to divide groundwater into upper and middle layers ( That is, the aforementioned pumping area) and the lower layer.

Then, by pumping the groundwater from the middle layer, the groundwater can form a circular flow field.

Further, the groundwater is sprayed by the (1) spray element in a fine water column; (2) the stripping plate is subjected to stripping treatment of the groundwater; and (3) the first gas introduction pipe and/or the second gas introduction pipe introduces gas In order to perform a treatment such as aeration treatment, the contact area between the liquid phase (groundwater) and the gas phase (introduced gas) can be further increased, and the effectiveness of the multilayer well pipe of the present invention for removing contaminants can be improved.

It can be seen from the foregoing description of the present invention that the multi-layer well pipe of the present invention forms a groundwater area by the inner wall and/or the inner wall of the outer pipe and the pumping area separated by the first blocking unit and the second blocking unit, so that groundwater is formed. Circulating the flow field and increasing the diffusion of pollutants in the groundwater, thereby improving the effectiveness of the multi-layer well pipe to remediate groundwater.

Wherein, when the user adds the reaction agent to the inner tube, the reaction agent is not directly mixed with the groundwater in the pumping area due to the separation of the first blocking unit, so the pumping line of the pump is not directly extracted to the reaction agent, but Improve the accuracy of sampling, and the reaction agent can further remove the pollutants from the groundwater, thereby improving the remediation efficiency of the multi-layer well pipe.

Secondly, by providing a filling tube between the inner tube and the outer tube, the groundwater flowing through the filling tube can remove the contaminant by the contained filling material to enhance the removal efficiency of the contaminant. Wherein, when the life of the filling material is reduced, the user can also separately replace the filling tube and replace the filling material therein. Therefore, the multilayer well pipe of the present invention has better maintenance convenience.

Furthermore, the gas is introduced into the groundwater of the specific area by the first gas introduction pipe and/or the second gas introduction pipe to perform the aeration treatment; and the groundwater is flowed through the stripping plate to perform the stripping treatment, and the present invention The multi-layer well pipe can increase the contact area between the liquid phase (groundwater) and the gas phase (the introduced gas), and further enhance the removal efficiency of the pollutant.

When the pump of the multi-layer well pipe further comprises a spraying component, the fine water column sprayed by the spraying component can further increase the contact area between the liquid phase and the gas phase, so that the multilayer well pipe has better removal efficiency of the pollutant.

The present invention has been disclosed in the above embodiments, and is not intended to limit the present invention. Any one of ordinary skill in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

100‧‧‧Multi-layer well pipe

100a‧‧‧ Ground

101‧‧‧water table

101a‧‧‧ Height

110‧‧‧External management

111/121‧‧‧ wall

120‧‧‧Inside

123/125/127‧‧‧First screening area

123a/125a/127a‧‧‧first screening depth

131‧‧‧Filling materials

131a‧‧‧fill height

140‧‧‧First blocking unit

140a‧‧‧Set depth

150‧‧‧Second blocking unit

150a‧‧‧Set depth

160‧‧‧ pumping area

170‧‧‧ pump

171‧‧‧ pumping line

171a‧‧‧Water outlet

171b‧‧ Direction

173‧‧‧Output line

173a‧‧‧Water outlet

173b‧‧ Direction

180‧‧‧ stripping board

180a‧‧‧Ventinel

190‧‧‧ gas supply unit

191‧‧‧First gas introduction tube

191a‧‧‧Import

193‧‧‧ gas

Claims (10)

A multi-layer well pipe comprising: an outer tube; an inner tube disposed in the outer tube, wherein one of the inner tubes has at least one first screening area, and each of the at least one first screening area One of the first screening depths is not higher than a water level; a plurality of filling tubes are disposed between the outer tube and the inner tube, wherein each of the filling tubes is provided with a plurality of filling materials, and the filling materials a filling height is not lower than the water level; a first blocking unit is disposed in the inner tube, and the first screening depth of one of the at least one first screening area is higher than the first blocking unit One of the second blocking units is disposed in the inner tube, wherein one of the second blocking units is disposed to a depth lower than the set depth of the first blocking unit, and the second blocking unit is opposite to the first blocking unit The unit defines a pumping area, and the tube wall of the inner tube corresponding to the level of the pumping area has the other of the at least one first screening area; a pump, comprising: a pumping pipeline connecting the pump Wherein one of the pumping lines is provided in the pumping area And an output line connecting the pump, wherein one of the outlets of the output line is disposed at one of the tops of the inner tube; at least one stripping plate, wherein one end of each of the at least one stripping plate is disposed at the inner tube On the wall of the tube, the other end of each of the at least one stripping plate and the inner portion The tube walls are at a distance from each other, and each of the at least one stripping plate is disposed between the water outlet and the water table; and a first gas introduction tube, wherein one of the first gas introduction tubes is disposed at the inlet The groundwater level and the first blocking unit. The multi-layer well pipe of claim 1, wherein the first screening depth of the other of the at least one first screening area is lower than the set depth of the second blocking unit. The multi-layer well pipe of claim 1, wherein one of the outer tube walls has at least one second screening area, and one of the at least one second screening area has a second screening depth Above the groundwater level. The multi-layer well pipe of claim 3, wherein one of the at least one first screening area is horizontally corresponding to one of the at least one second screening area. The multilayer well pipe of any one of claims 1 to 4, wherein the filler tubes surround the inner tube. The multi-layer well pipe according to any one of claims 1 to 4, wherein the pump further comprises a spray element connected to the water outlet, and the spray element has a plurality of water sprinkler holes. The multi-layer well pipe of any one of claims 1 to 4, wherein at least a portion of the filler materials are a reactive material and/or an adsorbent material. The multi-layer well pipe according to any one of claims 1 to 4, further comprising a second gas introduction pipe, and one of the inlet ports of the second gas introduction pipe is disposed in the pumping area. The multi-layer well pipe of claim 8, wherein the second gas introduction pipe is in communication with the first gas introduction pipe. The multi-layer well pipe according to any one of claims 1 to 4, wherein the at least one stripping plate is plural, and the stripping plates are not parallel to each other.