CN107055809B

CN107055809B - High-effect multi-angle well screen groundwater remediation equipment

Info

Publication number: CN107055809B
Application number: CN201710030678.8A
Authority: CN
Inventors: 杨博名; 陈敬远; 郭育嘉; 陈博明; 洪万墩; 黄庆连
Original assignee: Formosa Plastics Corp
Current assignee: Formosa Plastics Corp
Priority date: 2016-04-15
Filing date: 2017-01-17
Publication date: 2020-07-07
Anticipated expiration: 2037-01-17
Also published as: CN107055809A

Abstract

The invention discloses high-efficiency multi-angle well screen underground water remediation equipment which comprises a movable water purifying device, an extraction well pipe and at least one injection well pipe. The first tubular wall of the extraction well tubular has a plurality of first well screens thereon, each first well screen having a first screen opening angle of 90 degrees to 360 degrees. The second pipe wall of the at least one injection well pipe is provided with a plurality of second well screens. Each first well screen and each second well screen are oppositely disposed and each second well screen has a second opening angle of 90 degrees to 270 degrees. The high-efficiency multi-angle well screen underground water remediation equipment has high maneuverability, can stabilize the flow direction of underground water, limit the range of underground water pollutants and improve the proportion of the underground water pollutants extracted by the extraction well pipe, thereby increasing the in-situ treatment efficiency of the underground water.

Description

High-effect multi-angle well screen groundwater remediation equipment

Technical Field

The present invention provides an underground water remediation apparatus, and more particularly, to a high-efficiency multi-angle underground water remediation apparatus with a specific screening angle.

Background

The quality of underground water is changed due to natural or artificial activities, and the normal use of the underground water is influenced or the health and living environment of human bodies are harmed. Pollutants generated by human activities, such as industrial and agricultural wastewater, chemical substances permeated into the ground during industrial production, transportation or storage, can change the quality of the ground water, and cause pollution of the ground water. In particular, in the soil or groundwater in the surrounding strata of petrochemical plants, gas stations, etc., gasoline, diesel oil or organic solvents often permeate into the soil or groundwater, which is likely to cause pollution.

The groundwater pollutants include inorganic substances, organic substances, microorganisms, radioactive substances and the like. Depending on the degree of its dissolution in groundwater, it can be divided into two main categories, aqueous and non-aqueous. Most of the aqueous liquid is a solution formed by dissolving chemical substances in groundwater and is transported along with the flow direction of the groundwater. Non-aqueous liquids, referred to as NAPL (non-aqueous phase liquid) for short, are mostly water insoluble organic compounds, of which the lighter than water is referred to as lnapl (light NAPL), which collect above and are transported along the surface of the ground water. Heavier than water, called dnapl (dense napl), may pass through the surface of the groundwater, accumulate at the bottom of the aquifer, or seep down to deeper formations.

In order to solve the above-mentioned problem of contamination, the known art proposes an underground water circulation apparatus including a water purification device, an extraction pipe, and an injection pipe. The water purifier is provided with a water purifying tank, a water purifying barrel and a chemical water tank, underground water is pumped by the pumping pipe and then is input into the water purifying tank, and then chemical water is added into the water purifying tank through the chemical water tank to react with underground water pollutants, so that purified water is formed. The purified water is output to the purified water bucket and is discharged into the underground water layer through the injection pipe. The injection pipe may comprise a plurality of inner pipes having outlet ends of different depths and a plurality of well screens distributed on the pipe wall of the injection pipe. Through the inner tube and the well sieve of the different depth water outlet ends, the purified water can be discharged from the groundwater layers of different depths, so that a three-dimensional groundwater flowing direction can be formed, the range of groundwater pollutants can be effectively limited, and the effect of groundwater in-situ treatment is improved.

However, although the above-mentioned groundwater circulation equipment can effectively control the vertical flow direction of groundwater, the well screens of the extraction pipe and the injection pipe are all fully opened (i.e. the opening angle is 360 degrees), and the scope of groundwater pollutants cannot be effectively limited, so that the proportion of pollutants extracted by the extraction pipe is low, and the groundwater local treatment efficiency is limited.

Therefore, there is a need to provide an underground water remediation device that can stabilize the flow direction of underground water, limit the range of underground water pollutants, and increase the proportion of pollutants extracted by an extraction well pipe by adjusting the opening angle and the arrangement of a well screen between the extraction well pipe and an injection well pipe. In addition, the groundwater remediation equipment has high mobility and can continuously perform groundwater in-situ treatment outside the groundwater remediation equipment, so that the groundwater remediation (or in-situ treatment) efficiency is greatly improved.

Disclosure of Invention

Therefore, an object of the present invention is to provide a high-efficiency multi-angle well screen groundwater remediation device, which can improve the in-situ groundwater treatment efficiency by mainly utilizing the specific arrangement and screening angles of the well screens for pumping and injecting the well screens.

According to the purpose of the invention, the invention provides high-efficiency multi-angle well screen underground water remediation equipment. In an embodiment, the high-efficiency multi-angle well screen groundwater remediation device includes a mobile water purification device, an extraction well pipe and at least one injection well pipe. The mobile water purifying device comprises a buffer tank, a reaction tank and at least one injection tank. The buffer tank comprises a buffer tank body which is communicated with the first pipeline, and the first pipeline is provided with a first motor. The reaction tank is communicated with the buffer tank body through a second pipeline, and the reaction tank comprises a reaction tank body for accommodating the first reusable slow release reagent. The at least one injection groove can be communicated with the reaction groove body through a third pipeline, wherein each injection groove comprises an injection groove body, the injection groove bodies can be communicated with a fourth pipeline, and the fourth pipeline can be provided with a second motor. The extraction well pipe penetrates through the ground surface and is communicated with the buffer groove body through a first pipeline, wherein a plurality of first well sieves are arranged on the first pipe wall of the extraction well pipe, the minimum distance between the first well sieves and the ground surface is a first depth, one end of the first pipeline in the extraction well pipe is a water inlet, the water inlet is spaced from the ground surface by a second depth, and each first well sieve has a first sieve opening angle of 90-360 degrees. The at least one injection well pipe penetrates through the ground surface and is communicated with the injection groove body through a fourth pipeline, wherein the fourth pipeline is a water outlet at one end of the injection well pipe, the injection well pipe and the extraction well pipe are separated by a preset distance, a plurality of second well sieves are arranged on the second pipe wall of each injection well pipe, and the minimum distance between each second well sieve and the ground surface is a third depth. Each of the first well screens and each of the second well screens are oppositely disposed and each of the second well screens has a second opening angle of 90 degrees to 270 degrees. And taking the distance from the ground surface to the underground water line as a fourth depth, wherein the first depth, the second depth and the third depth are respectively greater than the fourth depth.

According to an embodiment of the present invention, the high-efficiency multi-angle well screen groundwater remediation equipment further includes a moving device, wherein the mobile water purification device can be disposed on the moving device.

According to an embodiment of the present invention, the extraction well may contain a second reusable sustained release agent, and/or the at least one injection well may contain a third reusable sustained release agent.

According to an embodiment of the present invention, the first reusable sustained release agent, the second reusable sustained release agent and the third reusable sustained release agent may be the same or different, respectively.

According to an embodiment of the present invention, the first reusable sustained release agent, the second reusable sustained release agent and the third reusable sustained release agent may each comprise a porous carrier and a reactant.

According to an embodiment of the present invention, the reactant may comprise a microorganism and/or a nutrient.

According to an embodiment of the present invention, the reactant may include an adsorbent, an oxidizing agent, a reducing agent, a combination of an adsorbent and an oxidizing agent, or a combination of an adsorbent and a reducing agent.

According to an embodiment of the present invention, the predetermined distance may be 3 meters to 15 meters.

According to an embodiment of the invention, the total amount of extracted well casing is equal to the total amount of injected well casing.

The high-efficiency multi-angle well screen underground water remediation equipment has the advantages of high maneuverability, continuous underground water in-situ treatment outside the underground water remediation equipment, stable underground water flowing direction, limited underground water pollutant range, increased proportion of underground water pollutants extracted by the extraction well pipe and the like. Therefore, the high-efficiency multi-angle well screen underground water remediation equipment can greatly improve the groundwater remediation efficiency.

Drawings

The invention will be better understood from the following detailed description taken in conjunction with the accompanying drawings. It is noted that, in accordance with standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.

FIG. 1 is a sectional view of an efficient multi-angle well screen groundwater remediation apparatus according to an embodiment of the present invention;

FIG. 2 is a partial top view of an apparatus for high efficiency multi-angle screen groundwater remediation according to another embodiment of the present invention;

FIG. 3 is a partial top view of an efficient multi-angle well screen groundwater remediation apparatus according to yet another embodiment of the present invention;

FIG. 4 is a cross-sectional view of an injection well pipe of a high performance multi-angle well screen groundwater remediation apparatus according to yet another embodiment of the present invention.

Detailed Description

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. Specific examples of components and arrangements are described below to simplify the present disclosure. Of course, these are merely examples and are not intended to be limiting. For example, recitation in the following description of a first feature formed over or on a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be included in forming between the first and second features, such that the first and second features may not be in direct contact. Further, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Furthermore, spatially relative terms, such as "under," "below," "lower," "above," "higher," and the like, may be used herein for ease of description of the relationship of an element or feature to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of elements in use or steps in addition to the orientation depicted in the figures. Elements may be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial descriptors used herein interpreted accordingly.

The invention aims to provide high-efficiency multi-angle well screen underground water remediation equipment, which utilizes a movable water purifying device to add a reusable slow-release reagent into underground water, matches the relative arrangement of a well screen of an extraction well pipe and at least one injection well pipe and a specific screen opening angle, and adjusts the total extraction amount of the extraction well pipe to be equal to the total injection amount of the at least one injection well pipe, thereby achieving the advantages of high maneuverability, continuous underground water in-situ treatment outside the underground water remediation equipment, stable underground water flowing direction, limited underground water pollutant range, increased underground water pollutant proportion extracted by the extraction well pipe and the like, and further increasing the underground water in-situ treatment efficiency.

The groundwater referred to herein in the present invention is groundwater that has not been treated in situ by the high efficiency multi-angle well screen groundwater remediation apparatus of the present invention. The remediating water referred to herein is groundwater that has been treated in situ by the apparatus of the present invention.

The mobility of the present invention refers to that the mobile water purification apparatus of the present invention can be carried on a mobile device (such as the mobile device 105 shown in fig. 1), so that groundwater can be treated in situ at different locations. The moving device may be a trolley or a car, for example, but the invention is not limited thereto.

The opening angle referred to herein in the present invention refers to the arc of the circumference of the wall of the extraction or injection well pipe that the well screen occupies.

The limiting groundwater pollutant range referred to herein means that the groundwater has a regular flow direction by utilizing the arrangement mode and the specific screening opening angle of the well screen of the extraction well pipe and the at least one injection well pipe, and the same total extraction amount and total injection amount of the extraction well pipe and the at least one injection well pipe, so that groundwater pollutants can be limited to the vicinity of the extraction well pipe, and the proportion of groundwater pollutants extracted by the extraction well pipe is increased.

The reusable sustained release agent of the present invention as referred to herein comprises a porous carrier and a reactant. In one embodiment, the porous carrier can be, for example, ceramic, cement, gypsum, paraffin, or peat, and the reactant can be a microorganism and/or a nutrient. In another embodiment, the reactant may comprise an adsorbent, an oxidizing agent, a reducing agent, a combination of an adsorbent and an oxidizing agent, a combination of an adsorbent and a reducing agent, or the like. The reusable slow release reagent can be recovered after the reaction of the reactants is finished, and the activity of the reactants is recovered through oxidation-reduction reaction, so that the reusable slow release reagent can be reused.

In one example, the microbial organisms may be, for example, degrading bacteria that decompose groundwater contaminants, and the nutrient may include a component that assists the degrading bacteria in propagating or increasing their degradation efficiency. Specifically, the nutrients may include, but are not limited to, carbon, nitrogen and/or phosphorus containing compounds such as: soybean oil, ricinoleic acid, lauric acid, myristic acid, oleic acid, magnesium salt, phosphate, or the like.

The groundwater remediation referred to herein in the present invention means that the above-mentioned reusable slow-release reagent is used to react with groundwater pollutants, thereby removing groundwater pollutants. The reaction may be, for example, a biological reaction in which the degrading bacteria decompose groundwater contaminants.

The three-dimensional confined space referred to herein in the present invention means a space formed by vertical and horizontal flow directions of groundwater.

Referring to fig. 1, a cross-sectional view of a high performance multi-angle well screen groundwater remediation apparatus according to an embodiment of the invention is shown. The high-performance multi-angle well screen groundwater remediation equipment 100 comprises a mobile water purification device 110, an extraction well pipe 150 and at least one inlet well pipe 160. The mobile water purifying apparatus 110 includes a buffer tank 120, a reaction tank 130, and at least one injection tank 140.

The buffer tank 120 includes a buffer tank body 121, the buffer tank body 121 is communicated with the first pipeline 111, and the first pipeline 111 is provided with a first motor 112. The groundwater is extracted from the extraction well pipe 150 using the first motor 112 and is received in the buffer tank 121.

The reaction tank 130 is communicated with the buffer tank body 121 through the second pipeline 113, and the reaction tank 130 includes a reaction tank body 131 for accommodating a reusable slow-release reagent 133.

The at least one injection groove 140 may be in communication with the reaction tank body 131 through a third pipeline 115, wherein each injection groove 140 includes an injection tank body 141, the injection tank body 141 may be in communication with the fourth pipeline 117, and the fourth pipeline 117 may be provided with a second motor 114. As shown in FIG. 1, two injection slots 140 are shown in this embodiment, however, it should be understood by those skilled in the art that the number of injection slots may be increased or decreased according to the amount of water to be treated in the reaction tank 130, and specifically, the number of injection slots may be 1, 3, 4 or more.

The above-mentioned extraction well pipe 150 is arranged through the ground surface 101 and is communicated with the buffer tank body 121 through the first pipeline 111, wherein the first pipe wall 151 of the extraction well pipe 150 is provided with a plurality of first well screens 153, the minimum distance between the first well screens and the ground surface 101 is a first depth H1, one end of the first pipeline 111 in the extraction well pipe is a water inlet 111A, and the distance between the water inlet 111A and the ground surface 101 is a second depth H2.

The at least one injection well pipe 160 is arranged through the ground surface 101 and is communicated with the injection groove body 141 through a fourth pipe 117, wherein the fourth pipe 117 is a water outlet 117A at one end of the injection well pipe 160, the injection well pipe 160 is separated from the extraction well pipe 150 by a preset distance D, a plurality of second well screens 163 are arranged on the second pipe wall 161 of each injection well pipe 160, and the minimum distance between each second well screen 163 and the ground surface 101 is a third depth H3. In one embodiment, the predetermined distance D may be 3 meters to 15 meters. The distance from the ground surface 101 to the underground water line 103 is taken as a fourth depth H4, and the first depth H1, the second depth H2 and the third depth H3 are respectively larger than the fourth depth H4. Further, the total amount of extraction of the extraction well pipe 150 is equal to the total amount of injection of the injection well pipe 160.

In one embodiment, when the mobile water purification apparatus 110 is installed on the mobile device 105, the first pipeline 111 and the fourth pipeline 117 in the mobile device 105 and the fourth pipeline 117 of the first pipeline 111 outside the mobile device 105 may be connected using the first adapter ring 116 and the second adapter ring 118, respectively, to extend the first pipeline 111 into the extraction well pipe 150 and extend the fourth pipeline 117 into the injection well pipe 160.

In an embodiment, the reusable sustained-release reagent 133 can be contained inside the extraction well pipe 150 and the injection well pipe 160, wherein the reusable sustained-release reagent 133 in the reaction tank 130, the extraction well pipe 150 and the injection well pipe 160 can be the same or different, and the specific composition of the reusable sustained-release reagent 133 has been described in the foregoing, and therefore, is not described herein again. In another example, the interior of the extraction well 150 and/or the injection well 160 does not contain the reusable slow-release reagent 133.

The operation of the high-efficiency multi-angle well screen groundwater remediation device of the present invention will be described with reference to fig. 1. Particularly, before the high-efficiency multi-angle well screen underground water remediation equipment is used, a preset number of underground water wells can be drilled at the position where underground water is scheduled to be extracted and the remediation water is injected, so that the subsequent arrangement of an extraction well pipe and an injection well pipe is facilitated. The method of drilling an underground water well is well known to those skilled in the art and will not be described herein.

As shown in fig. 1, groundwater is pumped from the pumping well pipe 150 through the first well screen 153 into the buffer tank 121 through the first pipe 111 by the first motor 112 (as shown in the groundwater flow direction 107). Since the reusable slow-release reagent 133 is contained in the pumping well pipe 150, part of the reusable slow-release reagent 133 is pumped into the buffer tank 121 together with the groundwater, and therefore the groundwater remediation has already started in the buffer tank 121. Then, the groundwater (and part of the reusable slow-release reagent 133) in the buffer tank 121 is conveyed to the reaction tank 131 through the second pipeline 113, so that the groundwater contacts with the reusable slow-release reagent 133 contained in the reaction tank 131 to remediate the groundwater, thereby forming remediated water. Next, the remedial water is transported into the injection trough 141, and the remedial water is injected into the injection well pipe 160 through the fourth pipeline 117 by the second motor 114, and the remedial water injected into the well pipe 160 flows into the groundwater layer through the second well screen 163 (as shown in the groundwater flow direction 109). Further, since the reusable slow-release reagent 133 is also contained in the injection well pipe 160, the effect of the in-situ groundwater treatment can be enhanced. Furthermore, since the remedial water flowing into the groundwater layer still contains the reusable slow release agent 133, the remedial water can be continuously treated in situ with the groundwater even after returning to the groundwater layer by virtue of the contained reusable slow release agent 133, so as to remove pollutants in the groundwater layer, thereby improving the remedial efficiency of the groundwater.

Next, please refer to fig. 2, which is a partial top view illustrating a high performance multi-angle well screen groundwater remediation apparatus 200 according to another embodiment of the present invention. In fig. 2, for simplicity of illustration, only the extraction well pipe 250 and the injection well pipe 260 of the high-performance multi-angle well screen groundwater remediation apparatus 200 are shown. In this embodiment, the high performance multi-angle well screen groundwater remediation apparatus 200 includes an extraction well pipe 250 and an injection well pipe 260.

In fig. 2, circles representing the extraction well pipe 250 and the injection well pipe 260 are divided into eight virtual parts by a line segment a-a ', a line segment B-B ', a line segment C-C ', a line segment D-D ', a line segment E-E ', a line segment F-F ', and a line segment G-G ', respectively, to describe in detail the effect of a specific opening angle of the first well screen 253 and the second well screen 263 to be described later. As shown in fig. 2, the first well screen 253 is disposed on a first tubular wall 251 of the extraction well casing 250, the second well screen 263 is disposed on a second tubular wall 261 of the injection well casing 260, and the first well screen 253 and the second well screen 263 are disposed opposite to each other.

In this embodiment, as shown in FIG. 2, the first well screen 253 is positioned along the arc formed by the end point C of the line segment C-C 'and the end point D of the line segment D-D' to form a screen opening angle of 90 degrees. The second well screen 263 is disposed along the arc formed by the end point G 'of line segment G-G' and the end point F 'of line segment F-F' to form a 90 degree open screen angle. However, in other embodiments, the open screen angle of the first well screen 253 can be any angle between 90 degrees and 360 degrees, and the open screen angle of the second well screen 263 can be any angle from the 90 degrees open screen angle formed by the end point F 'of the line segment F-F' and the end point G 'of the line segment G-G' to the 270 degrees open screen angle formed by the end point F of the line segment F-F 'and the end point G of the line segment G-G' (the range shown by the arrow 271 in fig. 2).

In another example, the open-mesh angle of the first well screen 253 may be 360 degrees, i.e., the first well screen 253 is disposed around the first tubular wall 251 of the extraction wellbore tubular 250, while the open-mesh angle of the second well screen 263 may be maintained at 90 degrees.

As shown in fig. 2, the high performance multi-angle well screen groundwater remediation apparatus 200 of the present invention simultaneously extracts groundwater through the extraction well pipe 250 and injects remediation water through the injection well pipe 260, wherein the groundwater enters the extraction well pipe 250 through the first well screen 253, the remediation water is discharged back into the groundwater layer through the second well screen 263, and the total extraction amount of groundwater is equal to the total injection amount of the remediation water. In fig. 2, the flow direction 273 of groundwater is limited to be between the first well screen 253 and the second well screen 263.

Therefore, the high-efficiency multi-angle well screen groundwater remediation apparatus 200 of the present invention has the effects of stabilizing the groundwater flow direction and limiting the groundwater contaminant range by the way of oppositely arranging the first well screen 253 and the second well screen 263, by the specific screen opening angle, and by simultaneously extracting and injecting the same amount of groundwater and remediation water. In addition, the smaller the opening angle of the first and second well screens 253 and 263 is, the more concentrated and stable the flowing direction of groundwater can be, and the disturbance of groundwater can be reduced, so that the extraction well pipe 250 can extract more groundwater pollutants.

Next, referring to fig. 3, a partial top view of a high performance multi-angle well screen groundwater remediation apparatus 300 according to yet another embodiment of the present invention is shown. As in fig. 2, only the pumping well pipe 350 and the plurality of injection well pipes 360 of the high performance multi-angle well screen groundwater remediation apparatus 300 are shown for simplicity of illustration. As shown in fig. 3, the high performance multi-angle well screen groundwater remediation apparatus 300 includes an extraction well pipe 350 and four injection well pipes (e.g., an injection well pipe 360A, an injection well pipe 360B, an injection well pipe 360C, and an injection well pipe 360D), wherein the injection well pipe 360A, the injection well pipe 360B, the injection well pipe 360C, and the injection well pipe 360D are disposed at equal intervals from each other and at a fixed predetermined distance D from the extraction well pipe 350. In this embodiment, the predetermined distance D is 5 meters. In other embodiments, the preset distance D may be any distance between 3 meters and 15 meters, the injection well

pipes

360A, 360B, 360C and 360 may be arranged at equal or unequal intervals, and the number of injection well pipes may be adjusted according to actual requirements.

Specifically, if the preset distance D is less than 3 meters, the underground water extraction efficiency is not good because the first well screen 353 and the second well screen (for example, the second well screen 363A, the second well screen 363B, the second well screen 363C, and the second well screen 363D) are too close to each other, and thus the groundwater remediation efficiency cannot be effectively improved. On the other hand, if the preset distance D is greater than 15 meters, the first well screen 353 and the second well screen (for example, the second well screen 363A, the second well screen 363B, the second well screen 363C, and the second well screen 363D) are too far away from each other, so that the flow direction of the groundwater cannot be effectively controlled, and therefore, the effect of limiting the range of groundwater pollutants cannot be achieved, and the groundwater remediation efficiency cannot be improved.

In this embodiment, the first well screen 353 of the extraction well pipe 350 is disposed opposite to the second well screen 363A, the second well screen 363B, the second well screen 363C, and the second well screen 363D of the injection well pipe 360A, the injection well pipe 360B, the injection well pipe 360C, and the injection well pipe 360D, respectively. The opening angle of the first well screen 353 is 360 degrees, and the opening angles of the second well screen 363A, the second well screen 363B, the second well screen 363C and the second well screen 363D are each 90 degrees, wherein the opening angle is defined as shown in FIG. 2 and not described further herein. In addition, the total pumping amount of the pumping well pipe 350 as illustrated in fig. 3 is the same as the total injection amount of the injection well pipe 360A, the injection well pipe 360B, the injection well pipe 360C, and the injection well pipe 360D.

As shown in fig. 3, although the open angle of the first well screen 353 of the extraction well pipe 350 is 360 degrees, four injection well pipes are provided around the extraction well pipe 350, namely, an injection well pipe 360A, an injection well pipe 360B, an injection well pipe 360C, and an injection well pipe 360D. Thus, the opening angle of the first well screen 353 can be considered as 90 degrees for the respective injection well pipe 360A, injection well pipe 360B, injection well pipe 360C, and second well screen 363A, second well screen 363B, second well screen 363C, and second well screen 363D (opening angle is 90 degrees) of the injection well pipe 360A, injection well pipe 360B, injection well pipe 360C, and injection well pipe 360D. That is, the embodiment of fig. 3 is configured to divide the flow direction of groundwater into four regions (region a, region B, region C, and region D), and the flow directions (e.g., flow direction 373A, flow direction 373B, flow direction 373C, and flow direction 373D) are all confined between the first well screen 353 and the respective second well screens. Therefore, the high-performance multi-angle well screen groundwater remediation device 300 of the present embodiment can still stabilize the groundwater flow direction, so that the pumping well pipe 350 pumps more groundwater pollutants.

The high-efficiency multi-angle well screen groundwater remediation equipment shown in fig. 1 to 3 is characterized in that a reusable slow-release reagent is added to groundwater through a movable water purification device, and by utilizing the arrangement mode of an extraction well pipe and an injection well pipe, the specific arrangement mode and the screen opening angle of a first well screen and a second well screen, and the characteristic that the total extraction amount of groundwater is equal to the total injection amount of remediation water, high mobility can be achieved, groundwater can be continuously treated in situ outside the groundwater remediation equipment, the horizontal flow direction of groundwater is stabilized, the disturbance of groundwater is reduced, the groundwater pollutant range is limited, the proportion of groundwater pollutants extracted through the extraction well pipe is improved, and the groundwater pollutant proportion can be greatly improved.

Next, referring to fig. 4, a cross-sectional view of an injection well pipe 460 of the high performance multi-angle well screen groundwater remediation apparatus 400 according to yet another embodiment of the present invention is shown. In fig. 4, the injection well pipe 460 includes a plurality of fourth pipes (fourth pipe 417A, fourth pipe 417B, and fourth pipe 417C) and a plurality of packings (packing 470, packing 480, and packing 490), and the

packings

470, 480, and 490 are provided in the injection well pipe 460 to divide the injection well pipe 460 into a space 470A, a space 480A, and a space 490A. The fourth line, referred to herein as the fourth line 117, is the same as the fourth line described above, and is in communication with an injection well (not shown) for injecting the remedial water into the injection well pipe 460. The water outlets of the pipelines for injecting the treatment water can be arranged on underground water layers with different depths. For example, fourth conduit 417A, fourth conduit 417B, and fourth conduit 417C have water outlet 419A, water outlet 419B, and water outlet 419C, respectively, wherein water outlet 419A is located in space 470A, water outlet 419B is located in space 480A, and water outlet 419C is located in space 490A. Further, space 470A, space 480A, and space 490A contain at least one well screen (e.g., well screen 463A, well screen 463B, and well screen 463C) on a tubular wall 461 of injection well tubular 460.

The water outlets can be matched with well screens with different depths to increase the vertical flowing direction of the underground water, so that the underground water pollutants can only flow in a three-dimensional limited space. For example, as shown in fig. 4, remedial water may be injected into the space 470A via the fourth conduit 417A and drained out of the injection well pipe 460 through the well screen 463A (as shown by flow direction 500); remedial water may also be injected into the space 480A via the fourth conduit 417B and drained out of the injection well pipe 460 through the well screen 463B (as shown by flow direction 510); alternatively, remedial water may also be injected into the space 490A via the fourth conduit 417C and drained out of the injection well pipe 460 through the well screen 463C. Because the well screen 463A, the well screen 463B and the well screen 463C are located on the pipe walls of the injection well pipe 460 at different heights, respectively, the discharged remediation water may be located in groundwater layers at different depths, thereby providing a vertical flow direction of groundwater.

In conjunction with the embodiments shown in fig. 1 to 4, the high efficiency multi-angle well screen groundwater remediation apparatus of the present invention can control the three-dimensional (horizontal and vertical) flowing direction of groundwater, so that groundwater pollutants can be further localized in a three-dimensional confined space, thereby further improving the in-situ groundwater treatment efficiency.

The practical application effect of the high-efficiency multi-angle well screen groundwater remediation equipment is described by using a plurality of embodiments.

Distance between pumping well pipe and injection well pipe

In order to measure the appropriate distance between the extraction well pipe and the injection well pipe (i.e., the predetermined distance D), the present invention uses the injection well pipe as the center, and arranges a plurality of extraction well pipes at different distances on both sides of the injection well pipe, and adds hydrogen peroxide (H2O2) as a tracer at a concentration of 3 wt.% to the injection well pipe. According to table 1 below, hydrogen peroxide concentrations of at least 7mg/L were measured at extraction wells 3 to 15 meters from injection wells, showing that the extraction wells of the present invention effectively limited the flow range of hydrogen peroxide at a distance of 3 to 15 meters from the injection wells. Therefore, in the embodiment described later, the extraction well pipe and the injection well pipe are disposed at a distance in the above range.

Influence of the screening angle on the proportion of extracted groundwater pollutants

Example 1

Example 1 an equal-fold (100-fold) reduction model of a high-performance multi-angle well screen groundwater remediation apparatus 100 as shown in figure 1 was used to simulate in situ treatment of groundwater, where the groundwater contains sodium bromide as a tracer at an initial concentration of 3 wt%. The extraction ratio of groundwater contaminants is known from the ratio of the concentration of sodium bromide in the extracted groundwater to its initial concentration, and the specific opening angle, the number of injection well pipes and the evaluation results are detailed in table 2 and not further described herein.

Examples 2 to 3 and comparative examples 1 to 2

Examples 2 to 3 and comparative examples 1 to 2 were conducted using the same high-performance multi-angle well screen groundwater remediation apparatus 100 as in example 1, except that examples 2 to 3 and comparative examples 1 to 2 were conducted by changing the open angle of injection well pipes, and specific apparatus parameters and evaluation results thereof are shown in table 2.

TABLE 2

Evaluation method

Proportion of groundwater contaminants

The groundwater contaminant ratio referred to herein in the present invention is a ratio of contaminants in groundwater extracted by an extraction well pipe, and is determined by adding sodium bromide having an initial concentration of 3 wt% to groundwater and determining the ratio of the extracted groundwater contaminants based on the concentration of bromide ions in the extracted groundwater relative to the initial concentration thereof. The bromide ion concentration is measured by bromide ion electrode (model: STARA 324; brand name, Thermo ORINO). In this evaluation method, the higher the proportion of groundwater pollutants that can be extracted by the extraction well pipe is, the more effective groundwater remediation can be performed, and therefore the higher the proportion of groundwater pollutants is, the better it is.

As can be seen from the evaluation results in table 2, examples 1 to 3 utilize the specific arrangement and the opening angle of the well screen for the extraction well pipe and the injection well pipe, so that the extraction well pipe can extract a high groundwater contaminant ratio. On the other hand, it can also be seen from the embodiments of the present invention that the smaller the opening angle of the extraction well pipe and the injection well pipe is, the easier it is to obtain a higher groundwater contaminant ratio.

However, as is clear from comparative examples 1 and 2 in table 2, when the opening angle of the injection well pipe is larger than 270 degrees, the rate of the contaminants extractable through the extraction well pipe becomes low, and therefore the groundwater remediation efficiency is affected.

By applying the high-efficiency multi-angle well screen groundwater remediation equipment, the reusable slow-release reagent is used for treating groundwater pollutants, and the maneuverability of the groundwater remediation equipment can be improved through the movable water purifying device. In addition, the underground water flow direction can be stabilized, the range of underground water pollutants is limited, the proportion of the underground water pollutants extracted by the extraction well pipe is improved, the underground water is continuously treated in situ outside the underground water treatment equipment, and further the underground water treatment efficiency can be increased through the arrangement mode of the specific extraction well pipe and the at least one injection well pipe, the relative arrangement of the first well screen and the second well screen, the specific screen opening angles of the first well screen and the second well screen and the simultaneous extraction and injection of the same amount of underground water.

The foregoing outlines features of various embodiments so that those skilled in the art may further understand the detailed description of the present disclosure. Those skilled in the art should readily appreciate that they can readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. It should also be understood by those skilled in the art that the same structures as described above may be made, substituted or replaced without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a high-effect multi-angle well screen groundwater remediation equipment which characterized in that contains:

portable purifier contains:

the buffer tank comprises a buffer tank body, wherein the buffer tank body is communicated with a first pipeline, and the first pipeline is provided with a first motor;

the reaction tank is communicated with the buffer tank body through a second pipeline, wherein the reaction tank comprises a reaction tank body for accommodating a first reusable slow-release reagent; and

at least one injection groove communicated with the reaction groove body through a third pipeline, wherein each injection groove comprises an injection groove body which is communicated with a fourth pipeline, and the fourth pipeline is provided with a second motor;

the extraction well pipe penetrates through the ground surface and is communicated with the buffer groove body through the first pipeline, wherein a plurality of first well screens are arranged on a first pipe wall of the extraction well pipe, the minimum distance between the first well screens and the ground surface is a first depth, one end of the first pipeline in the extraction well pipe is a water inlet, the water inlet is spaced from the ground surface by a second depth, and each first well screen has a first screen opening angle of 90-360 degrees;

at least one injection well pipe penetrating the earth's surface and communicating with the injection trough body through the fourth pipe, wherein one end of the fourth pipe in the at least one injection well pipe is a water outlet, the at least one injection well pipe is separated from the extraction well pipe by a preset distance, a plurality of second well screens are arranged on the second pipe wall of each of the at least one injection well pipe, the minimum distance between the plurality of second well screens and the earth's surface is a third depth, each of the first well screens and each of the second well screens are arranged oppositely, and each of the second well screens has a second screening angle of 90-270 degrees, and

and taking the distance from the earth surface to the underground water line as a fourth depth, wherein the first depth, the second depth and the third depth are respectively greater than the fourth depth.

2. The high-efficiency multi-angle well screen groundwater remediation apparatus of claim 1, further comprising a moving device, wherein the mobile water purification device is disposed on the moving device.

3. The high efficiency multi-angle well screen groundwater remediation apparatus of claim 1 wherein the extraction well pipe houses a second reusable slow release agent and/or the at least one injection well pipe houses a third reusable slow release agent.

4. The high efficiency multi-angle well screen groundwater remediation apparatus of claim 3, wherein the first reusable slow release reagent, the second reusable slow release reagent, and the third reusable slow release reagent are each the same or different.

5. The high efficiency multi-angle well screen groundwater remediation device of claim 3, wherein the first reusable slow release reagent, the second reusable slow release reagent, and the third reusable slow release reagent each comprise a porous carrier and a reactant.

6. The high efficiency multi-angle well screen groundwater remediation device of claim 5, wherein the reactant comprises a microorganism and/or a nutrient.

7. The high efficiency multi-angle well screen groundwater remediation apparatus of claim 6, wherein the reactant comprises an adsorbent, an oxidizing agent, a reducing agent, a combination of the adsorbent and the oxidizing agent, or a combination of the adsorbent and the reducing agent.

8. The high efficiency multi-angle well screen groundwater remediation apparatus of claim 1, wherein the predetermined distance is from 3 meters to 15 meters.

9. The high efficiency multi-angle well screen groundwater remediation device of claim 1, wherein the total extraction volume of the extraction wells is equal to the sum of the injection volume of each of the at least one injection well pipes.