A smart aeration wellhead and smart aeration system for soil remediation

Abstract

This invention discloses an intelligent aeration wellhead and an intelligent aeration system for soil remediation. The intelligent aeration wellhead is equipped with a gas flow regulating valve, an electromagnetic three-way valve, a liquid flow regulating valve, an aeration inlet port, a drainage outlet port, an aeration outlet port, a drainage port, detection instruments, and a wellhead control system. In conjunction with the intelligent control system, based on real-time changes in the aeration input pressure, real-time aeration output flow rate, and real-time water level, the intelligent aeration wellhead is controlled to operate in both drainage and aeration modes. While maintaining the pressure and flow rate of compressed air injected into the aeration pipeline at preset aeration pressure and flow rate, the water level in the aeration well is automatically controlled between a preset drainage level and the screen opening height. This ensures effective aeration and avoids the problem that excessively high water levels in the aeration well prevent the compressed air injected according to the preset aeration pressure and flow rate from being effectively discharged into the soil for aeration.

Description

Technical Field

[0001] This invention relates to the field of in-situ multiphase extraction technology for soil remediation, specifically to an intelligent aeration wellhead and intelligent aeration system for soil remediation. Background Technology

[0002] During the use of existing aeration wells, the water level inside the well is often too high, which makes it impossible to effectively discharge the compressed air into the soil when the preset aeration pressure and preset aeration volume are injected into the aeration well.

[0003] There are three existing technologies to solve the above problems: First, the aeration pressure or flow rate needs to be manually increased to force the liquid in the aeration well out through the increased compressed air. After the excessively high water level in the aeration well is forcibly reduced to a suitable height, the compressed air pressure and flow rate are then restored to the preset aeration pressure and flow rate. Second, the drain valve at the head of the aeration well is manually opened to drain the water accumulated in the aeration well out through the high-pressure gas inside the aeration well. Third, the liquid in the aeration well is extracted using a water pump.

[0004] The existing solutions described above have the following drawbacks: The process of resolving these problems is not only time-consuming but also damages the instruments at the top of the aeration well head. Furthermore, due to the size and structural limitations of the aeration well, a water pump cannot be installed. Forcing the use of a water pump would occupy space at the bottom of the well, reducing injection efficiency. If sediment accumulates, it will further affect injection efficiency and pump operation. Summary of the Invention

[0005] One of the technical problems to be solved by the present invention is to provide an intelligent aeration wellhead for soil remediation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A smart aeration well head for soil remediation includes a well head housing for installation at the wellhead of an aeration well; characterized in that:

[0008] The wellhead shell has a waterproof sealed inner cavity, in which a gas flow regulating valve, a solenoid three-way valve and a liquid flow regulating valve are installed.

[0009] The wellhead shell is provided with an exposed aeration inlet, a drainage outlet, an aeration outlet, and a drainage port. The drainage outlet and the aeration outlet are both exposed below the bottom partition of the waterproof sealed inner cavity of the wellhead shell. The aeration inlet, aeration outlet, and drainage port are preferably quick-connect interfaces to facilitate quick connection with the corresponding external pipes.

[0010] The intelligent aeration wellhead achieves the following connections through an internal pipe set inside the wellhead shell: the aeration inlet is connected to the inlet of the electromagnetic three-way valve through a gas flow regulating valve; the first outlet of the electromagnetic three-way valve is connected to the drainage outlet; and the second outlet of the electromagnetic three-way valve is divided into two paths, the first path being connected to the aeration outlet and the second path being connected to the drainage outlet through a liquid flow regulating valve.

[0011] Furthermore, the wellhead casing is equipped with detection instruments and a wellhead control system. The detection instruments can detect the real-time aeration input pressure and real-time aeration output flow rate of the intelligent aeration wellhead, as well as the real-time water level in the aeration well where the intelligent aeration wellhead is installed. The wellhead control system can send the data detected by the detection instruments to an external intelligent control system, and can control the working status of the gas flow regulating valve, the solenoid three-way valve, and the liquid flow regulating valve according to the instructions sent by the intelligent control system. Preferably, the wellhead control system adopts a PLC control system.

[0012] Preferably, the detection instrument includes a pressure detector, a flow monitor, and a liquid level detector; the pressure detector is used to monitor the air pressure at the aeration inlet as the real-time aeration input air pressure; the flow monitor is used to monitor the gas flow at the aeration outlet as the real-time aeration output flow; and the liquid level detector is used to monitor the water level in the aeration well as the real-time water level.

[0013] Preferably, a data display table is installed on the top of the wellhead casing; the data detected by the detection instrument is displayed on the data display table.

[0014] The second technical problem to be solved by the present invention is to provide an intelligent aeration system for soil remediation, so as to solve the problem in the prior art where the water level in the aeration well is too high, which causes the compressed air injected into the aeration well according to the preset aeration pressure and flow rate to fail to effectively aerate the soil.

[0015] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0016] A smart aeration system for soil remediation includes: an aeration well and a smart control system; characterized in that:

[0017] The aeration well is equipped with the intelligent aeration well head; the aeration inlet is connected to an aeration pipe for injecting compressed air, the aeration outlet is connected to the upper pipe of the aeration pipe, the lower pipe of the aeration pipe extends to the screen opening position of the aeration well for connecting the inside and outside of the well, and the drainage interface is connected to a drainage pipe; the well head control system is communicatively connected to the intelligent control system.

[0018] The intelligent control system is configured by operators with preset aeration pressure, preset aeration flow rate, and preset drainage level. It receives data from monitoring instruments in real time through the wellhead control system and controls the intelligent aeration wellhead operation in the following manner:

[0019] When the real-time aeration input pressure reaches the preset aeration pressure and the real-time aeration output flow is zero, it is determined whether the real-time water level is above the preset drainage water level. If the determination result is yes, it indicates that the aeration well is blocked and the water level is too high. Then, the intelligent aeration well head is controlled to enter the drainage mode.

[0020] When the real-time water level drops below the opening height of the aeration well, the intelligent aeration well head is controlled to enter the aeration mode; wherein, the opening height is the highest point of the opening position of the aeration well used to connect the inside and outside of the well.

[0021] in:

[0022] See Figure 2 In the aeration mode, the gas flow regulating valve is opened according to a preset aeration flow rate, the first and second outlets of the electromagnetic three-way valve are closed and opened respectively, and the liquid flow regulating valve is closed; so that: compressed air injected from the aeration pipe enters the electromagnetic three-way valve through the gas flow regulating valve according to the preset aeration flow rate, and then enters the aeration well through the second outlet of the electromagnetic three-way valve, the aeration outlet interface and the aeration pipe in sequence, thereby realizing aeration.

[0023] See Figure 3 In the drainage mode, the gas flow regulating valve is controlled to open according to a preset aeration flow rate, the first and second outlets of the electromagnetic three-way valve are controlled to open and close respectively, and the liquid flow regulating valve is controlled to open; so that: compressed air injected from the aeration pipe enters the electromagnetic three-way valve through the gas flow regulating valve according to the preset aeration flow rate, and then enters the aeration well through the first outlet and the drainage outlet of the electromagnetic three-way valve in sequence. Thus, under the pressure of the compressed air output from the drainage outlet, the liquid with an excessively high water level in the aeration well enters the aeration pipe through the lower pipe port of the aeration pipe and flows upward, and then flows into the drainage pipe through the aeration outlet, the liquid flow regulating valve and the drainage outlet in sequence, thereby realizing the drainage of the liquid with an excessively high water level in the aeration well.

[0024] Therefore, this invention can automatically control the water level in the aeration well between the preset drainage water level and the screen opening height while keeping the pressure and flow rate of the compressed air injected into the aeration pipe constant at the preset aeration pressure and the preset aeration flow rate. This ensures that the aeration well can effectively achieve aeration and avoids the problem that the compressed air injected into the aeration well according to the preset aeration pressure and flow rate cannot be effectively discharged into the soil to achieve aeration due to the water level in the aeration well being too high.

[0025] Since this invention does not require temporary adjustments to the compressed air pressure and flow rate, it will not damage the instruments in the aeration well. Because this invention only requires changes to the structure of the intelligent aeration head, without altering the rest of the aeration well's structure, it will not adversely affect the aeration efficiency of the aeration well.

[0026] Preferably, the preset drainage water level is as follows: when the intelligent aeration head is operating in aeration mode, and the real-time aeration input pressure and real-time aeration output flow rate are preset aeration pressure and preset aeration flow rate, respectively, if the water level in the aeration well is lower than the critical water level, the compressed air input to the aeration well can discharge the liquid in the aeration well into the soil through the open screen position, thus achieving aeration; if the water level in the aeration well is above the critical water level, the compressed air input to the aeration well cannot discharge the liquid in the aeration well into the soil through the open screen position, thus failing to achieve aeration; this critical water level is the preset drainage water level.

[0027] The preset aeration pressure and preset aeration flow rate are set according to the influence range required when the aeration well aerates and repairs the soil, and can be adjusted according to the liquid level and pollutant concentration at the site where the aeration well is located.

[0028] Preferably, the intelligent control system controls the operation of the intelligent aeration wellhead in the following ways:

[0029] When the real-time aeration input pressure reaches the preset aeration pressure and the real-time aeration output flow is zero, a high water level warning is activated to alert the staff so that they can promptly go to the site to detect the fault in the aeration well.

[0030] When the real-time aeration output flow rate returns to the preset aeration flow rate, the high water level warning is lifted.

[0031] Preferably, the intelligent control system controls the operation of the intelligent aeration wellhead in the following ways:

[0032] When the aeration well is in an abnormal operating state, the intelligent aeration head is controlled to enter the drainage mode; the abnormal operating state of the aeration well includes:

[0033] Case 1: The real-time aeration input pressure is more than 1.5 times the preset aeration pressure, or less than 0.75 times the preset aeration pressure; that is, the real-time aeration input pressure is much greater than or much less than the preset aeration pressure.

[0034] Scenario 2: The real-time aeration output flow rate is more than 1.5 times the preset aeration flow rate, or less than 0.75 times the preset aeration flow rate; that is, the real-time aeration output flow rate is much greater than or much less than the preset aeration flow rate.

[0035] Scenario 3: The real-time water level is more than 1.5 times the preset drainage water level; that is, the real-time water level is much greater than the preset drainage water level.

[0036] Therefore, when an aeration well is detected to be in an abnormal working state, the present invention can control the intelligent aeration head to enter the drainage mode, so as to automatically eliminate the abnormal working state of the aeration well.

[0037] Preferably, the intelligent control system controls the operation of the intelligent aeration wellhead in the following ways:

[0038] When the intelligent control system determines for the Nth time within a preset time period that the real-time water level is above the preset drainage water level and controls the intelligent aeration well head to enter drainage mode, or when it determines for the Nth time that the aeration well is in an abnormal working state, the aeration well blockage alarm is activated; where N is the preset number of times, and N≥2. Therefore, on-site operators check the aeration well for blockages. After clearing the blockages, a trial run is conducted based on preset pressure and flow values. If the trial run is successful, i.e., both the pressure and flow values ​​reach the preset range, the aeration well blockage alarm is deactivated.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] First, this invention employs an intelligent aeration wellhead equipped with a gas flow regulating valve, an electromagnetic three-way valve, a liquid flow regulating valve, an aeration inlet port, a drainage outlet port, an aeration outlet port, a drainage port, detection instruments, and a wellhead control system. In conjunction with the intelligent control system, based on real-time changes in the aeration input pressure, real-time aeration output flow rate, and real-time water level, the intelligent aeration wellhead is controlled to operate in drainage mode and aeration mode respectively. This ensures that the pressure and flow rate of the compressed air injected into the aeration pipeline remain constant at the preset aeration pressure and flow rate, while automatically controlling the water level in the aeration well between the preset drainage level and the screen opening height. This ensures that the aeration well can effectively achieve aeration and avoids the problem that excessively high water levels in the aeration well prevent the compressed air injected according to the preset aeration pressure and flow rate from being effectively discharged into the soil for aeration.

[0041] Since this invention does not require temporary adjustments to the compressed air pressure and flow rate, it will not damage the instruments in the aeration well. Because this invention only requires changes to the structure of the intelligent aeration head, without altering the rest of the aeration well's structure, it will not adversely affect the aeration efficiency of the aeration well.

[0042] Secondly, when the invention detects that the aeration well is in an abnormal working state, it can control the intelligent aeration well head to enter the drainage mode, so as to automatically eliminate the abnormal working state of the aeration well. Attached Figure Description

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0044] Figure 1 This is a schematic diagram of the structure of the intelligent aeration wellhead of the present invention;

[0045] Figure 2 This is a schematic diagram of the compressed air flow direction in the aeration mode of the intelligent aeration head of the present invention;

[0046] Figure 3 This is a schematic diagram of the compressed air and water flow direction of the intelligent aeration head of the present invention in drainage mode. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the embodiments and accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the scope of protection of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative effort without departing from the inventive concept of the present invention are within the scope of protection of the present invention.

[0048] Example 1

[0049] like Figure 1 As shown, the present invention discloses an intelligent aeration wellhead for soil remediation, including a wellhead shell 1 for installation at the wellhead of an aeration well;

[0050] The wellhead shell 1 has a waterproof sealed inner cavity 1a, in which a gas flow regulating valve 2, an electromagnetic three-way valve 3 and a liquid flow regulating valve 4 are installed.

[0051] The wellhead shell 1 is provided with an exposed aeration inlet 5, a drainage outlet 6, an aeration outlet 7, and a drainage outlet 8. The drainage outlet 6 and the aeration outlet 7 are both exposed below the bottom partition 1-1 of the waterproof sealed inner cavity of the wellhead shell 1. The aeration inlet 5, the aeration outlet 7, and the drainage outlet 8 are preferably quick-connect interfaces to facilitate quick connection with the corresponding external pipes.

[0052] The intelligent aeration wellhead achieves the following connections through an internal pipe set inside the wellhead shell 1: the aeration inlet 5 is connected to the inlet of the electromagnetic three-way valve 3 through the gas flow regulating valve 2, the first outlet 3a of the electromagnetic three-way valve 3 is connected to the drainage outlet 6, and the second outlet 3b of the electromagnetic three-way valve 3 is divided into two paths, the first path is connected to the aeration outlet 7, and the second path is connected to the drainage outlet 8 through the liquid flow regulating valve 4.

[0053] Furthermore, the wellhead casing 1 is equipped with detection instruments and a wellhead control system. The detection instruments can detect the real-time aeration input pressure and real-time aeration output flow rate of the intelligent aeration wellhead, as well as the real-time water level in the aeration well where the intelligent aeration wellhead is installed. The wellhead control system can send the data detected by the detection instruments to an external intelligent control system, and can control the working status of the gas flow regulating valve 2, the electromagnetic three-way valve 3, and the liquid flow regulating valve 4 according to the instructions sent by the intelligent control system. Preferably, the wellhead control system adopts a PLC control system.

[0054] The above is the basic implementation method of this embodiment one, and further optimizations, improvements and limitations can be made based on this basic implementation method:

[0055] Preferably, the detection instruments include a pressure detector, a flow monitor, and a level detector; the pressure detector is used to monitor the air pressure at the aeration inlet 5 as the real-time aeration input air pressure; the flow monitor is used to monitor the gas flow at the aeration outlet 7 as the real-time aeration output flow; and the level detector is used to monitor the water level in the aeration well as the real-time water level.

[0056] Preferably, a data display table 9 is installed on the top of the wellhead housing 1; the data detected by the detection instrument is displayed on the data display table 9.

[0057] Example 2

[0058] Based on the above embodiment one, this embodiment two also adopts the following preferred implementation method:

[0059] A smart aeration system for soil remediation includes: an aeration well and a smart control system; characterized in that:

[0060] The aeration well is equipped with the intelligent aeration well head described in Embodiment 1; the aeration inlet 5 is connected to an aeration pipe for injecting compressed air, the aeration outlet 7 is connected to the upper pipe opening of the aeration pipe, the lower pipe of the aeration pipe extends to the screen opening position of the aeration well for connecting the inside and outside of the well, and the drainage interface 8 is connected to a drainage pipe; the well head control system is communicatively connected to the intelligent control system.

[0061] The intelligent control system is configured by operators with preset aeration pressure, preset aeration flow rate, and preset drainage level. It receives data from monitoring instruments in real time through the wellhead control system and controls the intelligent aeration wellhead operation in the following manner:

[0062] When the real-time aeration input pressure reaches the preset aeration pressure and the real-time aeration output flow is zero, it is determined whether the real-time water level is above the preset drainage water level. If the determination result is yes, it indicates that the aeration well is blocked and the water level is too high. Then, the intelligent aeration well head is controlled to enter the drainage mode.

[0063] When the real-time water level drops below the opening height of the aeration well, the intelligent aeration well head is controlled to enter the aeration mode; wherein, the opening height is the highest point of the opening position of the aeration well used to connect the inside and outside of the well.

[0064] in:

[0065] See Figure 2 In the aeration mode, the gas flow regulating valve 2 is opened according to the preset aeration flow rate, the first outlet 3a and the second outlet 3b of the electromagnetic three-way valve 3 are closed and opened respectively, and the liquid flow regulating valve 4 is closed; so that: the compressed air injected from the aeration pipe enters the electromagnetic three-way valve 3 through the gas flow regulating valve 2 according to the preset aeration flow rate, and then enters the aeration well through the second outlet 3b of the electromagnetic three-way valve 3, the aeration outlet port 7 and the aeration pipe in sequence, thereby realizing aeration.

[0066] See Figure 3 In the drainage mode, the gas flow regulating valve 2 is opened according to a preset aeration flow rate, the first outlet 3a and the second outlet 3b of the electromagnetic three-way valve 3 are opened and closed according to a preset aeration flow rate, and the liquid flow regulating valve 4 is opened according to a preset aeration flow rate. This allows compressed air injected from the aeration pipe to enter the electromagnetic three-way valve 3 through the gas flow regulating valve 2 at a preset aeration flow rate, and then enter the aeration well through the first outlet 3a and the drain outlet 6 of the electromagnetic three-way valve 3 in sequence. Thus, under the pressure of the compressed air output from the drain outlet 6, the liquid with an excessively high water level in the aeration well enters the aeration pipe through the lower pipe opening of the aeration pipe and flows upward. Then, it flows into the drainage pipe through the aeration outlet 7, the liquid flow regulating valve 4, and the drain outlet 8 in sequence, thereby realizing the drainage of the liquid with an excessively high water level in the aeration well.

[0067] Therefore, this invention can automatically control the water level in the aeration well between the preset drainage water level and the screen opening height while keeping the pressure and flow rate of the compressed air injected into the aeration pipe constant at the preset aeration pressure and the preset aeration flow rate. This ensures that the aeration well can effectively achieve aeration and avoids the problem that the compressed air injected into the aeration well according to the preset aeration pressure and flow rate cannot be effectively discharged into the soil to achieve aeration due to the water level in the aeration well being too high.

[0068] Since this invention does not require temporary adjustments to the compressed air pressure and flow rate, it will not damage the instruments in the aeration well. Because this invention only requires changes to the structure of the intelligent aeration head, without altering the rest of the aeration well's structure, it will not adversely affect the aeration efficiency of the aeration well.

[0069] The above is the basic implementation method of this embodiment two, and further optimizations, improvements and limitations can be made based on this basic implementation method:

[0070] Preferably, the preset drainage water level is as follows: when the intelligent aeration head is operating in aeration mode, and the real-time aeration input pressure and real-time aeration output flow rate are preset aeration pressure and preset aeration flow rate, respectively, if the water level in the aeration well is lower than the critical water level, the compressed air input to the aeration well can discharge the liquid in the aeration well into the soil through the open screen position, thus achieving aeration; if the water level in the aeration well is above the critical water level, the compressed air input to the aeration well cannot discharge the liquid in the aeration well into the soil through the open screen position, thus failing to achieve aeration; this critical water level is the preset drainage water level.

[0071] The preset aeration pressure and preset aeration flow rate are set according to the influence range required when the aeration well aerates and repairs the soil, and can be adjusted according to the liquid level and pollutant concentration at the site where the aeration well is located.

[0072] Preferably, the intelligent control system controls the operation of the intelligent aeration wellhead in the following ways:

[0073] When the real-time aeration input pressure reaches the preset aeration pressure and the real-time aeration output flow is zero, a high water level warning is activated to alert the staff so that they can promptly go to the site to detect the fault in the aeration well.

[0074] When the real-time aeration output flow rate returns to the preset aeration flow rate, the high water level warning is lifted.

[0075] Preferably, the intelligent control system controls the operation of the intelligent aeration wellhead in the following ways:

[0076] When the aeration well is in an abnormal operating state, the intelligent aeration head is controlled to enter the drainage mode; the abnormal operating state of the aeration well includes:

[0077] Case 1: The real-time aeration input pressure is more than 1.5 times the preset aeration pressure, or less than 0.75 times the preset aeration pressure; that is, the real-time aeration input pressure is much greater than or much less than the preset aeration pressure.

[0078] Scenario 2: The real-time aeration output flow rate is more than 1.5 times the preset aeration flow rate, or less than 0.75 times the preset aeration flow rate; that is, the real-time aeration output flow rate is much greater than or much less than the preset aeration flow rate.

[0079] Scenario 3: The real-time water level is more than 1.5 times the preset drainage water level; that is, the real-time water level is much greater than the preset drainage water level.

[0080] Therefore, when an aeration well is detected to be in an abnormal working state, the present invention can control the intelligent aeration head to enter the drainage mode, so as to automatically eliminate the abnormal working state of the aeration well.

[0081] Preferably, the intelligent control system controls the operation of the intelligent aeration wellhead in the following ways:

[0082] When the intelligent control system determines for the Nth time within a preset time period that the real-time water level is above the preset drainage water level and controls the intelligent aeration well head to enter drainage mode, or when it determines for the Nth time that the aeration well is in an abnormal working state, the aeration well blockage alarm is activated; where N is the preset number of times, and N≥2. Therefore, on-site operators check the aeration well for blockages. After clearing the blockages, a trial run is conducted based on preset pressure and flow values. If the trial run is successful, i.e., both the pressure and flow values ​​reach the preset range, the aeration well blockage alarm is deactivated.

[0083] In addition, the aforementioned intelligent control system can also be manually operated by staff by sending instructions to the intelligent aeration wellhead.

[0084] This invention is not limited to the specific embodiments described above. Based on the above content and in accordance with common technical knowledge and conventional methods in the field, without departing from the basic technical concept of this invention, this invention can also make other equivalent modifications, substitutions or alterations, all of which fall within the protection scope of this invention.

Claims

1. A smart aeration wellhead for soil remediation, comprising a wellhead housing (1) for installation at the wellhead of an aeration well; characterized in that: The wellhead shell (1) has a waterproof sealed inner cavity (1a), in which a gas flow regulating valve (2), an electromagnetic three-way valve (3) and a liquid flow regulating valve (4) are installed; The wellhead shell (1) is provided with an exposed aeration inlet (5), a drainage outlet (6), an aeration outlet (7) and a drainage outlet (8), and the drainage outlet (6) and the aeration outlet (7) are both exposed below the bottom partition (1-1) of the waterproof sealed inner cavity of the wellhead shell (1). The intelligent aeration head achieves the following connections through an internal pipe set inside the head shell (1): the aeration inlet (5) is connected to the inlet of the electromagnetic three-way valve (3) through the gas flow regulating valve (2), the first outlet (3a) of the electromagnetic three-way valve (3) is connected to the drainage outlet (6), and the second outlet (3b) of the electromagnetic three-way valve (3) is divided into two paths, the first path is connected to the aeration outlet (7), and the second path is connected to the drainage outlet (8) through the liquid flow regulating valve (4). Furthermore, the wellhead shell (1) is equipped with a detection instrument and a wellhead control system. The detection instrument can detect the real-time aeration input pressure and real-time aeration output flow of the intelligent aeration wellhead, as well as the real-time water level in the aeration well where the intelligent aeration wellhead is installed. The wellhead control system can send the data detected by the detection instrument to an external intelligent control system, and can control the working status of the gas flow regulating valve (2), the electromagnetic three-way valve (3), and the liquid flow regulating valve (4) according to the instructions sent by the intelligent control system.

2. The intelligent aeration wellhead for soil remediation according to claim 1, characterized in that: The detection instruments include a pressure detector, a flow monitor, and a liquid level detector; the pressure detector is used to monitor the air pressure at the aeration inlet (5) as the real-time aeration input air pressure; The flow monitor is used to monitor the gas flow at the aeration outlet (7) as the real-time aeration output flow. The liquid level detector is used to monitor the water level in the aeration well as the real-time water level.

3. The intelligent aeration wellhead for soil remediation according to claim 1 or 2, characterized in that: A data display table (9) is installed on the top of the wellhead casing (1); the data detected by the detection instrument is displayed on the data display table (9).

4. An intelligent aeration system for soil remediation, comprising: Aeration well and intelligent control system; characterized in that: The aeration well is equipped with the intelligent aeration well head as described in any one of claims 1 to 3; the aeration inlet port (5) is connected to an aeration pipe for injecting compressed air, the aeration outlet port (7) is connected to the upper port of the aeration pipe, the lower pipe of the aeration pipe extends to the screen opening position of the aeration well for connecting the inside and outside of the well, and the drainage port (8) is connected to a drainage pipe; the well head control system is communicatively connected to the intelligent control system. The intelligent control system is equipped with preset aeration pressure, preset aeration flow rate, and preset drainage water level. It receives data detected by the monitoring instruments in real time through the wellhead control system and controls the intelligent aeration wellhead to operate in the following manner: When the real-time aeration input pressure reaches the preset aeration pressure and the real-time aeration output flow is zero, it is determined whether the real-time water level is above the preset drainage water level. If the determination result is yes, the intelligent aeration well head is controlled to enter the drainage mode. When the real-time water level drops below the opening height of the aeration well, the intelligent aeration well head is controlled to enter the aeration mode. in: In the aeration mode, the gas flow regulating valve (2) is controlled to open according to the preset aeration flow rate, the first outlet (3a) and the second outlet (3b) of the electromagnetic three-way valve (3) are controlled to close and open respectively, and the liquid flow regulating valve (4) is controlled to close. In the drainage mode, the gas flow regulating valve (2) is controlled to open according to the preset aeration flow rate, the first outlet (3a) and the second outlet (3b) of the electromagnetic three-way valve (3) are controlled to open and close respectively, and the liquid flow regulating valve (4) is controlled to open.

5. The intelligent aeration system for soil remediation according to claim 4, characterized in that: The preset drainage water level is: when the intelligent aeration well head is working in aeration mode, and the real-time aeration input pressure and real-time aeration output flow rate are preset aeration pressure and preset aeration flow rate respectively, if the water level in the aeration well is lower than the critical water level, the compressed air input to the aeration well can discharge the liquid in the aeration well into the soil through the screen opening position. If the water level in the aeration well is above the critical water level, the compressed air input into the aeration well cannot discharge the liquid in the aeration well into the soil through the screen opening position; the critical water level is the preset drainage water level.

6. The intelligent aeration system for soil remediation according to claim 4 or 5, characterized in that: The intelligent control system also controls the operation of the intelligent aeration wellhead in the following ways: When the real-time aeration input pressure reaches the preset aeration pressure and the real-time aeration output flow is zero, a high water level warning is activated. When the real-time aeration output flow rate returns to the preset aeration flow rate, the high water level warning is lifted.

7. The intelligent aeration system for soil remediation according to claim 4 or 5, characterized in that: The intelligent control system also controls the operation of the intelligent aeration wellhead in the following ways: When the aeration well is in an abnormal operating state, the intelligent aeration head is controlled to enter the drainage mode; the abnormal operating state of the aeration well includes: Case 1: The real-time aeration input pressure is more than 1.5 times the preset aeration pressure, or less than 0.75 times the preset aeration pressure. Case 2: The real-time aeration output flow rate is more than 1.5 times the preset aeration flow rate, or less than 0.75 times the preset aeration flow rate; Scenario 3: The real-time water level is more than 1.5 times the preset drainage water level.

8. The intelligent aeration system for soil remediation according to claim 7, characterized in that: The intelligent control system also controls the operation of the intelligent aeration wellhead in the following ways: When the intelligent control system determines for the Nth time within a preset time period that the real-time water level is above the preset drainage water level and controls the intelligent aeration well head to enter the drainage mode, or when it determines for the Nth time that the aeration well is in an abnormal working state, the aeration well blockage alarm is activated; where N is the preset number of times, and N≥2.

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