Movable groundwater pollution remediation device

Abstract

The utility model discloses a movable groundwater pollution remediation device, which relates to the technical field of environmental protection equipment and comprises a trolley and an injection well arranged in a groundwater pollution area. An integrated liquid preparation box, an air compressor, a high-pressure liquid injection pump, a distribution box and a plurality of liquid storage boxes are arranged on the trolley; the liquid storage tank is communicated with a liquid preparation tank pipeline through a liquid preparation pump, and a stirrer is arranged in the liquid preparation tank; the device further comprises a sealing valve, a liquid injection pipe and an aeration pipe; the sealing valve is detachably matched with the injection well opening; the liquid preparation box is connected with the high-pressure liquid injection pump through a pipeline; the liquid injection pipe is communicated with the high-pressure liquid injection pump and the liquid preparation box, the aeration pipe is connected with the air compressor, the aeration pipe and the air compressor are movably and hermetically connected with the injection well through the sealing valve, and the free end can extend and adjust in the cavity of the injection well. And the liquid preparation pump, the high-pressure liquid injection pump, the stirrer and the air compressor are electrically connected with the distribution box respectively. The movable trolley is matched with the multiple injection wells, and each injection well can be repeatedly used for injection operation. Compared with the prior art, the flexibility is higher, and the cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of environmental protection equipment, concretely relates to a movable groundwater pollution remediation device. BACKGROUND

[0002] The groundwater in-situ microbial remediation technology is a green and efficient groundwater pollution remediation technology, mainly adopts biological aeration, biological stimulation, biological strengthening and the like, utilizes the growth metabolism of microorganisms to degrade the pollutants in groundwater, and has a good remediation effect on the pollutants such as 'three nitrogen', petroleum hydrocarbon and chlorinated hydrocarbon in groundwater.

[0003] The high-pressure jetting process usually adopts a drilling and jetting integrated device. For example, the patent document with the announcement number CN221522162U discloses a groundwater remediation liquid permeation injection device, which is a drilling and jetting integrated device adopting the high-pressure jetting process. However, such devices have high equipment costs, high operation technical requirements, are only suitable for single-cycle injection, and are difficult to adjust parameters and supplement injection after injection according to remediation effects.

[0004] The well-type injection process is characterized by one-time well completion and multiple injections by laying injection wells and using in-situ injection devices for liquid injection and aeration. For example, the patent document with the announcement number CN103145232A discloses a method and system for in-situ remediation of groundwater by using micro-nano bubbles, which adopts the well-type injection process. In the existing well-type injection process, one injection well is usually equipped with one fixed and independent injection platform. However, in actual research, the groundwater pollution area is often distributed in a scattered manner. If only one injection well is laid, it is difficult to cover the scattered pollution areas in a large range for pollution remediation. If an injection well and a corresponding injection platform are set up for each small groundwater pollution area, the cost is too high.

[0005] In addition, the existing equipment lacks effective integration and intelligent control functions in liquid preparation, liquid injection and aeration, and has problems such as excessive or insufficient injection of reagents, which may easily cause secondary pollution risk or reduce remediation effect. SUMMARY

[0006] In view of the problems in the related art, the utility model provides a movable groundwater pollution remediation device, which can facilitate liquid preparation, liquid injection and aeration operations on scattered multiple groundwater pollution areas, can realize multiple injections, and has a lower cost.

[0007] The utility model is implemented as follows:

[0008] A movable groundwater pollution remediation device comprises a movable trolley and a plurality of injection wells; the plurality of injection wells are respectively installed in a plurality of (dispersed) groundwater pollution areas, or in the same area with more serious pollution; the upper end of the injection well has an opening, the lower end extends from the ground to the remediation target layer, and the middle is a cavity;

[0009] A liquid preparation tank, an air compressor, a high-pressure liquid injection pump, a distribution box and a plurality of liquid storage tanks are fixedly arranged on the trolley; a liquid preparation pump is arranged between one of the liquid storage tanks and the liquid preparation tank, and they are sequentially connected by pipelines; a stirrer is arranged in the liquid preparation tank; different liquid storage tanks are used to store different original liquid remediation agents; the liquid preparation tank is used to prepare a composite remediation agent by using the original liquid remediation agents; and the stirrer is used to mix the different original liquid remediation agents uniformly;

[0010] It also comprises a sealing valve, a liquid injection pipe and an aeration pipe; the sealing valve is detachably matched with the opening; the liquid preparation tank and the high-pressure liquid injection pump are connected by pipelines; one end of the liquid injection pipe is a first free end, the other end is connected with the high-pressure liquid injection pump and communicates with the liquid preparation tank; one end of the aeration pipe is a second free end, and the other end is connected with the air compressor;

[0011] The liquid injection pipe and the aeration pipe are movably and sealingly connected with the sealing valve, and the first free end and the second free end can be movably extended in the cavity;

[0012] The liquid preparation pump, the high-pressure liquid injection pump, the stirrer and the air compressor are electrically connected with the distribution box.

[0013] Different liquid storage tanks are used to store different original liquid remediation agents, such as microbial agents, nutrients and chemical agents; the liquid preparation tank is used to prepare a composite remediation agent by using the original liquid remediation agents; the stirrer is used to mix the different original liquid remediation agents uniformly to prevent aggregation and precipitation; and the distribution box is used to supply power to different power units.

[0014] The liquid injection pipe can extend into the underground aquifer through the injection well, the composite remediation agent can be injected into the aquifer, and the depth of the first free end can be adjusted; the aeration pipe can extend into the aquifer through the injection well, air can be injected into the aquifer, and the depth of the second free end can be adjusted; the sealing valve is tightly connected with the opening of the injection well to ensure the injection pressure of the air and the liquid.

[0015] By pre-installing injection wells in different groundwater pollution areas, using a movable trolley to carry an integrated "liquid preparation-liquid injection-aeration" system, groundwater pollution remediation can be carried out in each area through each injection well, dynamic liquid preparation can be carried out, and liquid injection and aeration can be carried out at the same time. Compared with the prior art, the flexibility is higher, the cost is effectively reduced, including equipment cost, operation and maintenance cost, and labor cost. Moreover, each injection well can be repeatedly injected.

[0016] As a further optimization of the above solution, a pressure gauge is further included; the pressure gauge includes a display end and a detection end; the detection end extends into the cavity through the sealing valve; the display end is exposed outside the sealing valve.

[0017] The display end can be observed to monitor the aeration and liquid injection pressure in real time.

[0018] As a further optimization of the above solution, the liquid preparation tank is further provided with a pH online monitor for monitoring the pH value of the composite repair agent; the pH online monitor is electrically connected with the power box.

[0019] By collecting the pH value provided by the pH online monitor, it is determined whether the composite repair agent meets the requirements; when the pH value of the composite repair agent does not meet the requirements, the working of the different liquid preparation pumps is adjusted to regulate the proportion of different stock repair agents, so that the pH value of the composite repair agent after mixing meets the requirements.

[0020] As a further optimization of the above solution, the sealing valve and the opening are both provided with threads; the sealing valve is tightly connected with the opening through the threads.

[0021] As a further optimization of the above solution, the stirring unit includes a motor, a transmission shaft and stirring blades; the motor is fixed outside the liquid preparation tank; one end of the transmission shaft is in transmission connection with the motor; the other end of the transmission shaft extends into the liquid preparation tank and is in transmission connection with the stirring blades; the motor is electrically connected with the power box.

[0022] As a further optimization of the above solution, the lower end of the injection well is provided with a plurality of screen holes in the part extending into the ground; the screen holes are located on the outer circumferential side of the cavity.

[0023] The screen holes can allow the composite repair agent and the pressurized air to be injected from the injection well to the underground water-bearing soil layer in a circumferential direction, forming a surface diffusion effect. Further, the outer circumferential side of the injection well is further provided with a screen mesh covering the screen holes.

[0024] As a further optimization of the above solution, the pH online monitor is provided with a control module; the liquid preparation pump is provided with an input interface; the input interface is in electrical connection with the control module.

[0025] The control module sends an electrical signal to control and adjust the flow rate and flow of the liquid preparation pump according to the collected pH value, so as to adjust the acidity and alkalinity of the composite repair agent.

[0026] As a further optimization of the above solution, the pH online monitor is provided with a wireless communication module; the wireless communication module is in wireless connection with a remote terminal.

[0027] The pH on-line monitor can be controlled by a remote terminal such as a mobile phone or a computer, and the target pH value can be set.

[0028] The beneficial effects are as follows:

[0029] The utility model provides a movable groundwater pollution remediation device, through installing injection well in different groundwater pollution area respectively in advance, utilize movable trolley to carry " liquid preparation - liquid injection - aeration" integrated system, can pass through every injection well to every area groundwater pollution remediation, can carry out liquid preparation dynamically, and inject liquid and aerate groundwater simultaneously. And every injection well can repeat injection operation. Compared with the prior art, it is more flexible, effectively reduces the cost, including equipment cost, operation and maintenance cost, manpower cost.

[0030] In addition, the pH on-line monitor is arranged, the pump-in amount and speed of the stock solution remediation agent can be dynamically adjusted according to the pH value when the composite remediation agent is prepared, and then the pH value of the composite remediation agent is dynamically adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A three-dimensional structure schematic view of the movable groundwater pollution remediation device is provided for the utility model embodiment;

[0032] Figure 2 is Figure 1 a side view;

[0033] Reference signs:

[0034] 1, trolley; 2, injection well; 2-1, screen hole; 3, liquid preparation tank; 4, liquid storage tank; 4-1, galvanized iron pipe outer frame; 5, liquid preparation pump; 6, high-pressure liquid injection pump; 7, air compressor; 8, stirrer; 9, distribution box; 10, sealing valve; 11, liquid injection pipe; 12, aeration pipe; 13, pressure gauge; 14, pH on-line monitor. DETAILED DESCRIPTION

[0035] The technical solutions in the utility model embodiments will be clearly and completely described below with reference to the drawings in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0036] As Figure 1 , Figure 2As shown, the embodiment provides a movable groundwater pollution remediation device, which comprises a movable trolley 1 and a plurality of injection wells 2. In the embodiment, the trolley 1 is modified from a tractor, which is convenient for moving and transporting between the material area and the injection remediation area. The material area is an area for storing and loading the original liquid remediation agent. The injection remediation area is an area where the injection well 2 is installed.

[0037] The upper end of the injection well 2 has an opening, the lower end extends from the ground to the remediation target layer underground, and the middle is a cavity. In the embodiment, the lower end of the injection well 2 is provided with a plurality of screen holes 2-1 in the part extending underground. The screen holes 2-1 are located on the outer peripheral side of the cavity. The screen holes 2-1 can allow the composite remediation agent and the pressurized air to be injected from the injection well 2 to the underground water-bearing soil layer in a peripheral direction, forming a surface diffusion effect.

[0038] In the embodiment, the well pipe of the injection well 2 is made of Φ110mm PVC pipe, and a cutting machine is used to open screen holes 2-1 in the pipe wall to form a screen pipe. The processing position of the screen pipe is designed according to the distribution characteristics of the groundwater pollution. The installation depth of the injection well 2 is 10-20m, which ensures that the liquid injection reaches the remediation target layer.

[0039] The trolley 1 is fixedly provided with a liquid preparation tank 3, an air compressor 7, a high-pressure liquid injection pump 6, a power distribution box 9 and a plurality of (1, 2 or more) liquid storage tanks 4. Specifically, two liquid storage tanks 4 are used in the embodiment. The liquid storage tank 4 and the liquid preparation tank 3 are both IBC containers, which are composed of an HDPE water tank liner and a galvanized iron pipe outer frame 4-1, and have a capacity of 1000L. The high-pressure liquid injection pump 6 is a GM-120 type. The air compressor 7 is a 1.5Mpa piston air compressor, which is used for groundwater aeration and oxygenation.

[0040] A liquid preparation pump 5 is provided between one liquid storage tank 4 and the liquid preparation tank 3, and is connected in sequence by pipelines. The liquid preparation pump 5 is a DN50 valve, which can control the discharge speed of the original liquid remediation agent in the liquid storage tank 4.

[0041] The liquid preparation tank 3 is provided with a stirrer 8. Specifically, the stirring unit comprises a motor, a transmission shaft and stirring blades. The motor is fixedly provided outside the liquid preparation tank 3. One end of the transmission shaft is in transmission connection with the motor. The other end of the transmission shaft extends into the liquid preparation tank 3 and is in transmission connection with the stirring blades.

[0042] Different liquid storage tanks 4 are used to store different original liquid remediation agents. The liquid preparation tank 3 is used to prepare composite remediation agents by using the original liquid remediation agents. The stirrer 8 is used to mix the different original liquid remediation agents uniformly.

[0043] It also comprises a sealing valve 10, a liquid injection pipe 11 and an aeration pipe 12. The sealing valve 10 is detachably matched with the opening. Specifically, the sealing valve 10 and the opening are both provided with threads. The sealing valve 10 is tightly connected with the opening by threads.

[0044] Specifically, the sealing valve 10 is made of a Φ110mm PVC pipe, the top of which is sealed by a 5mm thick stainless steel plate and connected with a pressure gauge 13, and the bottom of which is connected with the opening of the injection well 2 through a PVC threaded pipe joint.

[0045] In the embodiment, the pressure gauge 13 comprises a display end and a detection end; the detection end extends into the cavity through the sealing valve 10; and the display end is exposed outside the sealing valve 10. The display end can be observed to monitor the aeration and liquid injection pressure in real time.

[0046] The liquid preparation tank 3 is connected with the high-pressure liquid injection pump 6 through a pipeline; one end of the liquid injection pipe 11 is a first free end, the other end is connected with the high-pressure liquid injection pump 6 and communicates with the liquid preparation tank 3; one end of the aeration pipe 12 is a second free end, the other end is connected with the air compressor 7;

[0047] The liquid injection pipe 11 and the aeration pipe 12 are movably and sealingly connected with the sealing valve 10, and the first free end and the second free end movably extend in the cavity. In the embodiment, the liquid injection pipe 11 and the aeration pipe 12 are 50 black high-pressure rubber pipes, which extend into the injection well 2 by 218m.

[0048] In the embodiment, the liquid preparation tank 3 is also provided with a pH online monitor 14 for monitoring the pH value of the composite repair agent. In the embodiment, the pH online monitor 14 is provided with a control module; the liquid preparation pump 5 is provided with an input interface; and the input interface is electrically connected with the control module. The control module sends an electrical signal to control and adjust the flow rate and flow of the liquid preparation pump 5 according to the collected pH value, so as to adjust the acidity and alkalinity of the composite repair agent.

[0049] In the embodiment, the pH online monitor 14 is provided with a wireless communication module; and the wireless communication module is wirelessly connected with a remote terminal. The remote terminal such as a mobile phone or a computer can control the pH online monitor 14, such as setting a target pH value.

[0050] The pH value provided by the pH online monitor 14 is collected to determine whether the composite repair agent meets the requirements; when the pH value of the composite repair agent does not meet the requirements, the operation of different liquid preparation pumps 5 is adjusted to regulate the proportion of different liquid repair agents, so that the pH value of the composite repair agent obtained after mixing meets the requirements.

[0051] The liquid preparation pump 5, the high-pressure liquid injection pump 6, the motor, the air compressor 7 and the pH online monitor 14 are electrically connected with the distribution box 9.

[0052] Different liquid storage tanks 4 are used to store different liquid repair agents such as microbial agents, nutrients and chemical agents; the liquid preparation tank 3 is used to prepare the composite repair agent by using the liquid repair agents; the stirrer 8 is used to mix the different liquid repair agents uniformly to prevent aggregation and precipitation; and the distribution box 9 is used to supply power to different electrical units.

[0053] The liquid injection pipe 11 can extend into the underground aquifer through the injection well 2 to inject the composite repair agent into the aquifer, and the depth of the first free end can be adjusted; the aeration pipe 12 can extend into the aquifer through the injection well 2 to inject air into the aquifer, and the depth of the second free end can be adjusted; the sealing valve 10 is tightly connected with the opening of the injection well 2 to ensure the injection pressure.

[0054] By pre-installing the injection well 2 in different groundwater pollution areas respectively, the movable trolley 1 is used to carry the “liquid preparation-injection-aeration” integrated system, so that the groundwater pollution repair can be carried out on each area through each injection well 2, the liquid can be dynamically prepared, and the groundwater can be injected and aerated at the same time. Compared with the prior art, the flexibility is higher, and the cost, including equipment cost, operation and maintenance cost and labor cost, is effectively reduced. Moreover, the injection operation can be repeatedly carried out through each injection well 2.

[0055] In the actual application of the embodiment, the whole device is used for groundwater pollution repair in a certain ionic rare earth mine area. The groundwater in the mine area is generally acidified, the minimum pH is 4.5, and the ammonia nitrogen and nitrate nitrogen are seriously over-standard, and the maximum concentrations are 97.38 mg / L and 51.35 mg / L respectively.

[0056] At this time, the two liquid storage tanks 4 carried on the trolley 1 are loaded with chemical agents (nutrients + sodium bicarbonate alkaline buffer) and microbial agents (nitrification-denitrification bacteria) respectively. The suitable pH range of the nitrification-denitrification bacteria is 6.5-8.5, which is used for neutralizing the acidic groundwater. The most suitable pH is 8.5, which is set by the on-line pH monitor 14, and the composite repair agent is prepared. The composite repair agent is injected into the injection well 2 under high pressure and is aerated at the same time. After injection, the pH of the groundwater is 6.5-8, and the DO concentration is > 2 mg / L, which is an aerobic environment. After multiple rounds of liquid injection repair for 6 months, the groundwater quality in the mine area is significantly improved, the pH is changed to 6.72, the ammonia nitrogen concentration is reduced to 4.44 mg / L with a removal rate of 95.4%, the nitrate nitrogen concentration is reduced to 5.87 mg / L with a removal rate of 88.6%, and the potential by-product nitrite nitrogen concentration is 0.06 mg / L, which is better than the limit value of the groundwater quality standard (GB / T 14848-2017) III standard.

[0057] According to the disclosure and teaching of the above description, the skilled person in the technical field to which the utility model belongs can also change and modify the above embodiments. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the utility model should fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the utility model.

Claims

1. A mobile groundwater remediation apparatus comprising a mobile cart and a plurality of injection wells; characterized in that: A plurality of injection wells are installed in a plurality of groundwater pollution areas respectively; the upper end of the injection well has an opening, the lower end extends from the ground to the remediation target layer underground, and the middle is a cavity; The trolley is fixedly provided with a liquid preparation tank, an air compressor, a high-pressure liquid injection pump, a distribution box and a plurality of liquid storage tanks; a liquid preparation pump is arranged between one of the liquid storage tanks and the liquid preparation tank, and they are sequentially connected by pipelines; the liquid preparation tank is provided with a stirrer; different liquid storage tanks are used to store different original liquid remediation agents; the liquid preparation tank is used to prepare a composite remediation agent by using the original liquid remediation agents; and the stirrer is used to mix the different original liquid remediation agents uniformly; It also includes a sealing valve, a liquid injection pipe and an aeration pipe; the sealing valve is detachably matched with the opening; the liquid preparation tank and the high-pressure liquid injection pump are connected by pipelines; one end of the liquid injection pipe is a first free end, the other end is connected with the high-pressure liquid injection pump and communicates with the liquid preparation tank; one end of the aeration pipe is a second free end, the other end is connected with the air compressor; The liquid injection pipe and the aeration pipe are movably and sealingly connected with the sealing valve, and the first free end and the second free end can movably extend in the cavity; The liquid preparation pump, the high-pressure liquid injection pump, the stirrer and the air compressor are electrically connected with the distribution box respectively.

2. A mobile groundwater pollution remediation apparatus according to claim 1, wherein: It also includes a pressure gauge; the pressure gauge includes a display end and a detection end; the detection end extends into the cavity through the sealing valve; and the display end is exposed outside the sealing valve.

3. The mobile groundwater remediation device of claim 1, wherein: The liquid preparation tank is also provided with a pH online monitor for monitoring the pH value of the composite remediation agent; the pH online monitor is electrically connected with the distribution box.

4. The mobile groundwater remediation device of claim 1, wherein: The sealing valve and the opening are both provided with threads; the sealing valve is tightly connected with the opening through the threads.

5. The mobile groundwater pollution remediation device of claim 1, wherein: The stirring unit includes a motor, a transmission shaft and stirring blades; the motor is fixedly arranged outside the liquid preparation tank; one end of the transmission shaft is in transmission connection with the motor; the other end of the transmission shaft extends into the liquid preparation tank and is in transmission connection with the stirring blades; and the motor is electrically connected with the distribution box.

6. The mobile groundwater pollution remediation device of claim 1, wherein: The lower end of the injection well is provided with a plurality of screen holes in the part extending underground; the screen holes are located on the outer circumferential side of the cavity.

7. The mobile groundwater pollution remediation device of claim 3, wherein: The pH online monitor is provided with a control module; the liquid preparation pump is provided with an input interface; and the input interface is in electrical signal connection with the control module.

8. A mobile groundwater pollution remediation apparatus according to claim 7, wherein: The pH online monitor is provided with a wireless communication module; and the wireless communication module is in wireless connection with a remote terminal.

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