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

Abstract

The invention discloses a high-efficiency multi-angle well screen groundwater treatment equipment, which includes a mobile water purification device, an extraction well pipe and at least one injection well pipe. The first pipe wall of the extraction well pipe is provided with a plurality of first well screens, and each first well screen has a first screen opening angle of 90 degrees to 360 degrees. The at least one injection well pipe has a plurality of second well screens on the second pipe wall. Each first well screen and each second well screen are arranged oppositely, and each second well screen has a second opening angle of 90 degrees to 270 degrees. The high-efficiency multi-angle well screen groundwater treatment equipment of the present invention has high mobility, can stabilize the flow direction of groundwater, limit the range of groundwater pollutants, and increase the proportion of groundwater pollutants extracted by the extraction well pipe, thereby increasing the on-site treatment efficiency of groundwater.

Description

High-efficiency multi-angle well screen groundwater remediation equipment

technical field

The present invention provides a groundwater remediation equipment, and especially provides a high-efficiency multi-angle well screen groundwater remediation equipment with a specific opening angle.

Background technique

Groundwater undergoes qualitative changes due to natural or human activities, which in turn affect normal uses or endanger human health and living environment. Pollutants generated by human activities, such as industrial and agricultural wastewater, chemical substances infiltrating into the ground caused by industrial production, transportation or storage, may change the quality of groundwater and cause groundwater pollution. Especially in the surrounding soil or groundwater of petrochemical factories, gas stations and other places, gasoline, diesel oil or organic solvents are usually infiltrated into it, which is easy to pollute the soil and groundwater.

The types of groundwater pollutants include inorganic substances, organic substances, microorganisms and radioactive substances. According to the degree of its dissolution in groundwater, it can be divided into two categories: water phase and non-aqueous phase. The aqueous liquid is mostly a solution formed by dissolving chemical substances in groundwater, and is transported along the flow direction of the groundwater. The non-aqueous phase liquid is called NAPL (non-aqueous phase liquid) for short, and most of them are organic compounds that are not soluble in water. Among them, the lighter than water is called LNAPL (light NAPL). groundwater transmission. Heavier than water, called DNAPL (dense NAPL), can pass through the groundwater surface, accumulate at the bottom of aquifers, or seep into deeper formations.

In order to solve the problem of the above-mentioned pollutants, the known technology proposes a groundwater circulation device, which includes a water purification device, an extraction pipe and an injection pipe. The water purification device is provided with a water purification tank, a water purification bucket and a medicine water tank. The groundwater is extracted through an extraction pipe and then input into the water purification tank. The clean water is output to the clean water bucket and discharged into the groundwater layer through the injection pipe. The above-mentioned injection pipe may include a plurality of inner pipes with water outlet ends of different depths and a plurality of well screens distributed on the pipe wall of the injection pipe. Through the above-mentioned inner pipes and well screens at the outlet ends of different depths, clean water can be discharged from the groundwater layers of different depths, so a three-dimensional groundwater flow direction can be formed, which can effectively limit the scope of groundwater pollutants, thereby improving the groundwater locality. processing effect.

However, although the above groundwater circulation equipment can effectively control the vertical flow direction of groundwater, because the well screens of the extraction pipe and injection pipe are all fully open screens (that is, the opening angle of the screen is 360 degrees), it is still unable to effectively limit the groundwater pollutants. Therefore, the proportion of pollutants extracted by the extraction pipe is low, so the efficiency of on-site groundwater treatment is limited.

Therefore, there is an urgent need to propose a groundwater remediation equipment, which can stabilize the flow direction of groundwater, limit the scope of groundwater pollutants, and increase the The proportion of pollutants extracted by the extraction well pipe. In addition, the above groundwater remediation equipment can have high mobility and can continue to perform on-site groundwater treatment outside the groundwater remediation equipment, so as to greatly improve the efficiency of groundwater remediation (or on-site treatment).

SUMMARY OF THE INVENTION

Therefore, an object of the present invention is to provide a high-efficiency multi-angle well screen groundwater remediation equipment, which can mainly utilize the specific setting method and opening angle of the well screen for the extraction well pipe and the injection well pipe to improve the performance of groundwater. processing efficiency.

According to the above purpose of the present invention, a high-efficiency multi-angle well screen groundwater remediation equipment is proposed. In one embodiment, the above-mentioned high-efficiency multi-angle well screen groundwater remediation equipment includes a mobile water purification device, an extraction well pipe and at least one injection well pipe. The above-mentioned mobile water purification device includes a buffer tank, a reaction tank and at least one injection tank. The buffer tank includes 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 the second pipeline, and the reaction tank includes a reaction tank body for accommodating the first reusable slow-release reagent. The at least one injection tank can be communicated with the reaction tank body via a third pipeline, wherein each injection tank includes an injection tank body, the injection tank body can be communicated with a fourth pipeline, and the fourth pipeline can be provided with a second motor. The above-mentioned extraction well pipe is penetrated on the surface and communicated with the buffer tank body through a first pipeline, wherein a plurality of first well screens are arranged on the first pipe wall of the extraction well pipe, and the minimum distance from the surface of the extraction well pipe is the first depth , one end of the first pipeline in the extraction well pipe is a water inlet, the water inlet is separated from the surface by a second depth, and each first well screen has a first opening angle of 90 degrees to 360 degrees. The above-mentioned at least one injection well pipe is penetrated on the surface and communicated with the injection tank body through a fourth pipeline, wherein the fourth pipeline is a water outlet at one end of the injection well pipe, and the injection well pipe is separated from the extraction well pipe by a preset A plurality of second well screens are arranged on the second pipe wall of each injection well pipe, and the minimum distance between the second well screens and the surface is a third depth. Each of the first well screens and each of the second well screens are disposed opposite to each other, and each of the second well screens has a second opening angle of 90 degrees to 270 degrees. In addition, taking the distance from the surface to the water table as the fourth depth, 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 above-mentioned high-efficiency multi-angle well screen groundwater remediation equipment further includes a mobile device, wherein the mobile water purification device can be installed on the mobile device.

According to an embodiment of the present invention, a second reusable slow-release agent can be accommodated in the extraction well pipe, and/or a third reusable slow-release agent can be accommodated in the at least one injection well pipe.

According to an embodiment of the present invention, each of the first reusable slow-release reagent, the second reusable slow-release reagent, and the third reusable slow-release reagent may be the same or different.

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

According to an embodiment of the present invention, the above-mentioned reactants may include microorganisms and/or nutrients.

According to an embodiment of the present invention, the above-mentioned reactants may comprise 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 present invention, the total extraction volume of the extraction well tube is equal to the total injection volume of the aforementioned injection well tube.

The high-efficiency multi-angle well screen groundwater remediation equipment of the present invention has high mobility, continuously performs groundwater on-site treatment outside the groundwater remediation equipment, stabilizes the groundwater flow direction, limits the range of groundwater pollutants, and increases the groundwater pollution extracted by the extraction well pipe. ratio, etc. Therefore, the application of the high-efficiency multi-angle well screen groundwater remediation equipment of the present invention can greatly improve the remediation efficiency of groundwater.

Description of drawings

A better understanding of the present invention can be obtained from the following detailed description in conjunction with the accompanying drawings. It should be noted that, according to 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 decreased in order to clarify the discussion.

1 is a cross-sectional view illustrating a groundwater remediation equipment for high-efficiency multi-angle well screens according to an embodiment of the present invention;

FIG. 2 is a partial top view illustrating a groundwater remediation equipment with high-efficiency multi-angle well screens according to another embodiment of the present invention;

FIG. 3 is a partial top view showing the groundwater remediation equipment of the high-efficiency multi-angle well screen according to another embodiment of the present invention;

4 is a cross-sectional view illustrating the injection well pipe of the high-efficiency multi-angle well screen groundwater remediation equipment according to still another embodiment of the present invention.

Detailed ways

The following disclosure provides many different embodiments or illustrations 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, embodiments described in the ensuing description where forming a first feature over or on a second feature may include forming direct contact between the first and second features, and may also include additional features that may form the first feature forming the first feature. and the second feature so that the first and second features may not be in direct contact. Additionally, the present disclosure may repeat reference numerals and/or letters in various instances. This repetition is for the purpose of simplicity and clarity and does not in itself determine the relationship between the various embodiments and/or configurations discussed.

In addition, spatially relative terms, such as "below," "below," "below," "above," "above," etc., may be used herein to simply describe the difference between an element or feature shown in the figures versus another A relationship of element(s) or feature(s). In addition to the orientations depicted in the figures, spatially relative terms are intended to encompass different orientations of elements in use or steps. Elements may be otherwise oriented (rotated 90 degrees or at other orientations) and relative spatial descriptions used herein interpreted accordingly.

One object of the present invention is to provide a high-efficiency multi-angle well screen groundwater remediation equipment, which uses a mobile water purification device to add a reusable slow-release reagent into groundwater, and cooperates with an extraction well pipe and at least one injection well The relative arrangement of the well screens of the tubes and the specific opening angle of the screen, and the adjustment of the total extraction volume of the extraction well tube to be equal to the total injection volume of at least one injection well tube, can achieve high mobility and continuous groundwater treatment outside the groundwater remediation equipment. It has the advantages of on-site treatment, stable groundwater flow direction, limited scope of groundwater pollutants, and increased proportion of groundwater pollutants extracted by the extraction well pipe, thereby increasing the efficiency of groundwater on-site treatment.

The groundwater referred to here in the present invention refers to the groundwater that has not been treated on site by the high-efficiency multi-angle well screen groundwater remediation equipment of the present invention. The remediation water referred to here in the present invention refers to groundwater that has been treated on-site by the equipment of the present invention.

The high mobility mentioned here in the present invention means that the mobile water purification device of the present invention can be carried on a mobile device (such as the mobile device 105 shown in FIG. 1 ), so that groundwater in different locations can be treated on site. The mobile device can be, for example, a trolley or a car, but the present invention is not limited thereto.

The screen opening angle referred to here in the present invention refers to the arc occupied by the well screen on the circumference of the pipe wall of the extraction well pipe or the injection well pipe.

The limited range of groundwater contaminants referred to here in the present invention refers to the setting method and specific opening angle of the well screen using the extraction well pipe and at least one injection well pipe, and the extraction well pipe and the at least one injection well pipe are the same The total extraction volume and total injection volume make the groundwater have a regular flow direction, and then the groundwater pollutants can be limited to the vicinity of the extraction well pipe, so as to increase the proportion of groundwater pollutants extracted by the extraction well pipe.

The reusable sustained-release agent referred to herein in the present invention comprises a porous carrier and a reactant. In one embodiment, the porous carrier may be, for example, ceramics, cement, gypsum, paraffin, or peat, and the above-mentioned reactants may be microorganisms and/or nutrients. In another embodiment, the reactants may comprise 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, and the like. The above-mentioned reusable slow-release reagent can be recovered after the reaction of the reactants is completed, and the activity of the reactants can be recovered through redox reaction, so it can be reused.

In one example, the above-mentioned microbial bacteria may be, for example, degrading bacteria that decompose groundwater pollutants, and the above-mentioned nutrient may include components that help the degrading bacteria to multiply or increase their degradation efficiency. Specifically, nutritional agents may include, but are not limited to, compounds containing carbon, nitrogen and/or phosphorus, such as soybean oil, ricinoleic acid, lauric acid, myristic acid, oleic acid, magnesium salts or phosphates, and the like.

The groundwater remediation referred to here in the present invention refers to using the above-mentioned reusable slow-release reagent to react with groundwater pollutants, thereby removing groundwater pollutants. The above-mentioned reaction can be, for example, a biological reaction in which degrading bacteria decompose groundwater pollutants.

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

Please refer to FIG. 1 , which is a cross-sectional view of a groundwater remediation equipment for high-efficiency multi-angle well screens according to an embodiment of the present invention. The high-efficiency multi-angle well screen groundwater remediation equipment 100 includes a mobile water purification device 110 , an extraction well pipe 150 and at least one well entry pipe 160 . The above-mentioned mobile water purification device 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 communicates with the first pipeline 111 and the first pipeline 111 is provided with a first motor 112 . Groundwater is extracted from the above-mentioned extraction well pipe 150 using the first motor 112 , and the groundwater is contained in the buffer tank body 121 .

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

The at least one injection tank 140 can be communicated with the reaction tank body 131 via the third pipeline 115, wherein each injection tank 140 includes an injection tank body 141, and the injection tank body 141 can be communicated 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 tanks 140 are shown in this embodiment. However, those skilled in the art should understand that the number of injection tanks can be increased or decreased according to the amount of water treated by the reaction tank 130 . That said, the number of injection slots may be 1, 3, 4 or more.

The above-mentioned extraction well pipe 150 is penetrated through the surface 101 and communicated with the buffer tank body 121 through the first pipeline 111, wherein the first pipe wall 151 of the extraction well pipe 150 has a plurality of first well screens 153, which are connected to the surface. The minimum distance of 101 is the first depth H1, one end of the first pipeline 111 in the extraction well pipe is the water inlet 111A, and the water inlet 111A is separated from the surface 101 by the second depth H2.

The at least one injection well pipe 160 is penetrated through the surface 101 and communicated with the injection tank body 141 through a fourth pipeline 117, wherein the fourth pipeline 117 is a water outlet 117A at one end of the injection well pipe 160, and the injection well pipe The 160 is separated from the extraction well pipe 150 by a preset distance D, the second pipe wall 161 of each injection well pipe 160 has a plurality of second well screens 163, and the minimum distance between the second well screens 163 and the surface 101 is the third depth H3. In one embodiment, the predetermined distance D may be 3 meters to 15 meters. Taking the distance from the surface 101 to the groundwater level line 103 as the fourth depth H4, the first depth H1, the second depth H2 and the third depth H3 are respectively greater than the fourth depth H4. In addition, the total extraction volume of extraction well tubulars 150 is equal to the total injection volume of injection well tubulars 160 .

In one embodiment, when the mobile water purification device 110 is installed on the mobile device 105 , the first pipeline 111 and the fourth pipeline 117 in the mobile device 105 are connected to the first pipeline 111 outside the mobile device 105 . The fourth pipeline 117 can 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 tubular 150 and extend the fourth pipeline 117 into the injection well tubular 160 .

In one embodiment, the inside of the extraction well tube 150 and the injection well tube 160 can accommodate the reusable slow-release reagent 133 , wherein the reusable slow-release reagent 133 in the reaction tank 130 , the extraction well tube 150 and the injection well tube 160 The reagents 133 may be the same or different, and the specific composition of the reusable sustained-release reagent 133 has been described in the foregoing content, so it will not be repeated here. In another example, the inside of the extraction well pipe 150 and/or the injection well pipe 160 does not contain the reusable slow-release agent 133 .

The operation mode of the high-efficiency multi-angle well screen groundwater remediation equipment of the present invention will be described below with reference to FIG. 1 . In particular, before using the high-efficiency multi-angle well screen groundwater remediation equipment of the present invention, a predetermined number of groundwater wells can be drilled at the predetermined groundwater extraction and injection remediation locations, so as to facilitate the subsequent extraction of well pipes and injection of well pipes setting. The method of drilling a groundwater well should be a technique well known to those skilled in the art, so it will not be repeated here.

As shown in FIG. 1 , groundwater is extracted from the extraction well pipe 150 through the first well screen 153 and extracted into the buffer tank 121 by the first motor 112 through the first pipeline 111 (as indicated by the groundwater flow direction 107 ). Since the reusable slow-release reagent 133 is accommodated in the extraction well pipe 150 , part of the reusable slow-release reagent 133 will be extracted into the buffer tank 121 together with the groundwater, so the groundwater is in the buffer tank 121 . Groundwater remediation has already begun. Afterwards, the groundwater (and part of the reusable slow-release reagent 133 ) in the buffer tank 121 is transported to the reaction tank 131 through the second pipeline 113 , so that the groundwater and the reusable water contained in the reaction tank 131 can be reused. The utilization-type slow-release reagent 133 is contacted to conduct groundwater remediation, thereby forming remediation water. Next, the remediation water is delivered to the injection tank 141, and the remediation water is injected into the injection well pipe 160 through the fourth pipeline 117 by the second motor 114, and the remediation water injected into the well pipe 160 will pass through the second well The screen 163 flows into the groundwater formation (as indicated by the groundwater flow direction 109). In addition, the reusable slow-release reagent 133 is also accommodated in the injection well pipe 160, so the effect of on-site treatment of groundwater can be further enhanced. Furthermore, since the remediation water flowing into the groundwater layer still contains the reusable slow-release reagent 133, with the reusable slow-release reagent 133 contained in the remediation water, the groundwater can be continuously treated on site after returning to the groundwater layer. , in order to remove pollutants in the groundwater layer, thereby improving the efficiency of groundwater remediation.

Next, please refer to FIG. 2 , which is a partial top view of a high-efficiency multi-angle well screen groundwater remediation apparatus 200 according to another embodiment of the present invention. In FIG. 2 , to simplify the description, only the extraction well pipe 250 and the injection well pipe 260 of the high-efficiency multi-angle well screen groundwater remediation equipment 200 are shown. In this embodiment, the high-efficiency multi-angle well screen groundwater remediation equipment 200 includes an extraction well pipe 250 and an injection well pipe 260 .

In Fig. 2, the line segment AA', line segment BB', line segment C-C', line segment D-D', line segment EE', line segment FF' and line segment G-G' are respectively used to The circles representing the extraction well pipe 250 and the injection well pipe 260 are each divided into eight imaginary parts to explain in detail the role of specific opening angles 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 the first pipe wall 251 of the extraction well pipe 250 , the second well screen 263 is disposed on the second pipe wall 261 of the injection well pipe 260 , and the first well The screen 253 and the second well screen 263 are positioned opposite each other.

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

In another example, the opening angle of the first well screen 253 may be 360 degrees, that is, the first well screen 253 is arranged around the first pipe wall 251 of the extraction well pipe 250, and the opening screen of the second well screen 263 The angle can be maintained at 90 degrees.

As shown in FIG. 2 , the high-efficiency multi-angle well screen groundwater remediation equipment 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 through the first well screen 253 In the pipe 250, the remediation water is discharged back into the groundwater layer via the second well screen 263, and the total amount of groundwater withdrawn is equal to the total injected amount of the remediation water. In FIG. 2 , the flow direction 273 of groundwater is limited between the first well screen 253 and the second well screen 263 .

Therefore, through the relative arrangement of the first well screen 253 and the second well screen 263, the specific opening angle of the screen, and the simultaneous extraction and injection of the same amount of groundwater and remediation water, the high-efficiency multi-angle well screen of the present invention can be used to remediate groundwater. The device 200 has the function of stabilizing the flow direction of groundwater and limiting the scope of groundwater pollutants. In addition, the smaller the opening angle of the first well screen 253 and the second well screen 263, the more concentrated and stable the groundwater flow direction can be, and the groundwater disturbance can be reduced, so that the extraction well pipe 250 can extract more groundwater pollutants .

Next, please refer to FIG. 3 , which is a partial top view of the high-efficiency multi-angle well screen groundwater remediation equipment 300 according to another embodiment of the present invention. Same as FIG. 2 , only the extraction well pipe 350 and the plurality of injection well pipes 360 of the high-efficiency multi-angle well screen groundwater remediation equipment 300 are shown here to simplify the description. As shown in FIG. 3, the high-efficiency multi-angle well screen groundwater remediation equipment 300 includes an extraction well pipe 350 and four injection well pipes (eg, injection well pipe 360A, injection well pipe 360B, injection well pipe 360C and injection well pipe 360D), The injection well pipe 360A, the injection well pipe 360B, the injection well pipe 360C and the injection well pipe 360D are arranged at equal distances from each other and a fixed preset distance D from the extraction well pipe 350 . In this embodiment, the preset distance D is 5 meters. In other embodiments, the preset distance D may be any distance between 3 meters and 15 meters, and the injection well pipes 360A, 360B, 360C, and 360 may be equidistant or unequal. setting, and the number of injection well pipes can also be adjusted according to actual needs.

In particular, if the above-mentioned preset distance D is less than 3 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 Screen 363D) is too close, resulting in poor groundwater extraction efficiency, so it cannot effectively improve groundwater remediation efficiency. On the other hand, if the above-mentioned preset distance D is greater than 15 meters, since the first well screen 353 and the second well screen (eg, the second well screen 363A, the second well screen 363B, the second well screen 363C and the second well screen 363D) ) is too far away to effectively control the flow direction of groundwater, so it cannot achieve the effect of limiting the scope of groundwater pollutants, so it cannot improve the efficiency of groundwater remediation.

In this embodiment, the first well screen 353 of the extraction well pipe 350 is connected to the second well screen 363A, the second well screen 363B, the injection well pipe 360A, the injection well pipe 360B, the injection well pipe 360C and the injection well pipe 360D The second well screen 363C and the second well screen 363D are respectively disposed opposite to each other. 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 of the screen is 90 degrees. The definition is shown in Figure 2 and is not explained here. In addition, the total extraction volume of extraction well pipe 350 shown in FIG. 3 is the same as the total injection volume of injection well pipe 360A, injection well pipe 360B, injection well pipe 360C and injection well pipe 360D.

As shown in FIG. 3 , although the opening angle of the first well screen 353 of the extraction well pipe 350 is 360 degrees, since the extraction well pipe 350 is provided with the injection well pipe 360A, the injection well pipe 360B, the injection well pipe 360C and the Injection well pipe 360D, a total of four injection well pipes. Therefore for the individual injector well pipe 360A, injector well pipe 360B, injector well pipe 360C and injector well pipe 360D second well screen 363A, second well screen 363B, second well screen 363C and second well screen 363D (open screen angle is 90 degrees), the opening angle of the first well screen 353 can be regarded as 90 degrees. That is to say, the arrangement of the embodiment in FIG. 3 can divide the flow direction of groundwater into four regions (region a, region b, region c, and region d, respectively), and the flow directions (such as 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 screen. Therefore, the high-efficiency multi-angle well screen groundwater remediation equipment 300 in this embodiment can still achieve a stable groundwater flow direction, so that the extraction well pipe 350 can extract more groundwater pollutants.

The above-mentioned high-efficiency multi-angle well screen groundwater remediation equipment in Figures 1 to 3 is a mobile water purification device that adds reusable slow-release reagents to groundwater, and uses the extraction well pipe and the injection well pipe. The specific setting method and opening angle of the well screen and the second well screen, as well as the characteristics that the total amount of groundwater extraction is equal to the total injection amount of remediation water, can achieve high mobility and continuous groundwater spotting outside the groundwater remediation equipment. It can treat and stabilize the horizontal flow direction of groundwater to reduce the disturbance of groundwater, limit the scope of groundwater pollutants, and increase the proportion of groundwater pollutants extracted by the extraction well pipe, so it can greatly improve the efficiency of groundwater remediation.

Next, please refer to FIG. 4 , which is a cross-sectional view of the injection well pipe 460 of the high-efficiency multi-angle well screen groundwater remediation equipment 400 according to another embodiment of the present invention. In FIG. 4, injection well tubing 460 includes a plurality of fourth lines (fourth line 417A, fourth line 417B, and fourth line 417C) and a plurality of liners (liner 470, liner 480, and liners pad 490), and the pad 470, the pad 480 and the pad 490 are disposed in the injection well pipe 460 to separate the injection well pipe 460 into a space 470A, a space 480A and a space 490A. The fourth pipeline referred to here is the same as the aforementioned fourth pipeline 117 , which is communicated with the injection tank (not shown), so as to inject the remediation water into the injection well pipe 460 . The water outlets of the above-mentioned multiple pipelines for injecting the remediation water can be arranged in groundwater layers of different depths. For example, the fourth pipeline 417A, the fourth pipeline 417B and the fourth pipeline 417C respectively have a water outlet 419A, a water outlet 419B and a water outlet 419C, wherein the water outlet 419A is located in the space 470A, and the water outlet 419B is located in the space 480A , and the water outlet 419C is located in the space 490A. In addition, at least one well screen (eg, well screen 463A, well screen 463B, and well screen 463C) is included on the pipe wall 461 of the injection well pipe 460 in space 470A, space 480A, and space 490A.

The above-mentioned water outlet can also be matched with well screens of different depths to increase the vertical flow direction of groundwater, so that groundwater pollutants only flow in a three-dimensional limited space. For example, as shown in FIG. 4, the remediation water can be injected into the space 470A through the fourth pipeline 417A, and discharged through the well screen 463A into the well tube 460 (as shown in the flow direction 500); the remediation water can also be injected through the fourth pipeline 463A. Fourth pipeline 417B is injected into space 480A and discharged through well screen 463B into well pipe 460 (as indicated by flow direction 510 ); alternatively, remediation water can also be injected into space 490A through fourth pipeline 417C and passed through the well Screen 463C exits injection well pipe 460 . Since the well screen 463A, the well screen 463B and the well screen 463C are respectively located on the pipe walls of the injection well pipe 460 at different heights, the discharged remediation water can be located in the groundwater layers at different depths, thereby providing a vertical flow direction of the groundwater.

With the embodiment shown in Figures 1 to 4, the high-efficiency multi-angle well screen groundwater remediation equipment of the present invention can control the three-dimensional (horizontal and vertical) flow direction of groundwater, so it can further confine groundwater pollutants in the three-dimensional confined space, In order to improve the efficiency of on-site treatment of groundwater.

The practical application effect of the high-efficiency multi-angle well screen groundwater remediation equipment of the present invention is described below by using several embodiments.

The distance between the extraction well pipe and the injection well pipe

In order to measure the appropriate setting distance between the extraction well pipe of the present invention and the injection well pipe (ie, the aforementioned preset distance D), the present invention takes the injection well pipe as the center, and sets a plurality of extraction well pipes at different distances on both sides of the extraction well pipe respectively. Hydrogen peroxide (H2O2) with a concentration of 3 wt.% was added as a tracer substance in the injection well pipe. According to Table 1 below, in the extraction well pipe from 3 meters to 15 meters from the injection well pipe, hydrogen peroxide with a concentration of at least 7 mg/L can be measured. Within a distance of 15 meters, the flow range of hydrogen peroxide can be effectively limited. Therefore, in the embodiments to be described later, the extraction well pipe and the injection well pipe are installed at the distance within the above-mentioned range.

Effect of screen opening angle on the proportion of groundwater pollutants extracted

Example 1

Example 1 is to use an equal (100 times) scaled model of the high-efficiency multi-angle well screen groundwater remediation equipment 100 as shown in FIG. 1 to simulate the on-site treatment of groundwater, wherein the groundwater contains sodium bromide as a tracer substance in an initial concentration of 3% by weight. According to the ratio of the sodium bromide concentration in the extracted groundwater to its initial concentration, the extraction ratio of groundwater pollutants can be known. The specific opening angle, the number of injection well pipes and the evaluation results are listed in Table 2. No further details are given here.

Examples 2 to 3 and Comparative Examples 1 to 2

Examples 2 to 3 and Comparative Examples 1 to 2 were carried out using the same high-efficiency multi-angle well screen groundwater remediation equipment 100 as Example 1, but Examples 2 to 3 and Comparative Examples 1 to 2 changed the opening of the injection well pipe. The sieve angle, its specific equipment parameters and evaluation results are listed in Table 2.

Table 2

Evaluation method

The proportion of groundwater pollutants

The groundwater pollutant ratio referred to here in the present invention refers to the proportion of pollutants in the groundwater extracted by the extraction well pipe, which is sodium bromide with an initial concentration of 3% by weight added to the groundwater, and according to the extracted The ratio of the concentration of bromide ions contained in groundwater relative to its initial concentration to determine the proportion of groundwater contaminants extracted. The above bromide ion concentration was measured with a bromide ion electrode (model: STARA324; brand; Thermo ORINO). In this evaluation method, the higher the proportion of groundwater pollutants that can be extracted by the extraction well pipe, the more effective groundwater remediation can be. Therefore, the higher the proportion of groundwater pollutants, the better.

From the evaluation results in Table 2, it can be seen that in Examples 1 to 3, the extraction well pipe can extract a higher proportion of groundwater pollutants by using the specific arrangement of the well screen and the opening angle of the extraction well pipe and the injection well pipe. On the other hand, according to the embodiment of the present invention, it can also be known 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 proportion of groundwater pollutants.

However, according to Comparative Examples 1 and 2 in Table 2, if the opening angle of the injection well pipe is greater than 270 degrees, the proportion of pollutants that can be extracted by the extraction well pipe becomes lower, which will affect the remediation efficiency of groundwater.

By applying the high-efficiency multi-angle well screen groundwater remediation equipment of the present invention, reusable slow-release reagents are used to treat groundwater pollutants, and the mobility of the groundwater remediation equipment can be improved through the mobile water purification device. In addition, the specific arrangement of the 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 opening angle of the first well screen and the second well screen, and the simultaneous extraction are also possible. The same amount of groundwater as injected can be used to stabilize the flow direction of groundwater, limit the scope of groundwater pollutants, increase the proportion of groundwater pollutants extracted by the extraction well pipe, and continue to conduct groundwater on-site treatment outside groundwater remediation equipment, thereby increasing groundwater remediation. efficiency.

The foregoing summarizes the features of various embodiments so that those skilled in the art may further understand the specific implementation of the invention. Those of ordinary skill in the art will readily be able to 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 described herein. It should also be understood by those of ordinary skill in the art that the above-described equivalent structures do not depart from the spirit and scope of the present invention, and that they may be modified, substituted, or substituted without departing from the spirit and scope of the present invention.

Claims (9)

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.

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