Automatic adjusting method, system and equipment for concentration of harmful gas in landfill leachate pit and storage medium

Abstract

The invention discloses a method, a system and equipment for automatically adjusting the concentration of harmful gases in a landfill leachate pit and a storage medium, and the method comprises the following steps: monitoring the concentration of various harmful gases in the landfill leachate pit in real time through a gas monitoring device, and judging whether the harmful gases in the various harmful gases exist or not; if the harmful gas with the concentration exceeding the concentration safety threshold value exists or not, the fan control system is driven to start the second fan to disperse the harmful gas, otherwise, the normally-open state of the first fan and the normally-stop state of the second fan are maintained, and after the second fan is started, the second fan is stopped; and if it is monitored that no harmful gas exceeding the respective concentration safety threshold exists in the various harmful gases, the fan control system is driven to shut down the second fan. Therefore, starting and stopping of the second fan are controlled based on the concentration of the harmful gas in the pit monitored in real time, so that automatic adjustment of the concentration of the harmful gas is achieved, and potential safety hazards caused by increase of the concentration of the harmful gas in the pit can be avoided on the premise that the second fan is not excessively used.

Description

Technical Field

[0001] The present application relates to the field of automatic monitoring technology, and more specifically, to an automatic adjustment method, system, equipment and storage medium for the concentration of harmful gases in a garbage leachate pit. Background Art

[0002] With the rapid development of the waste incineration power generation industry, a large number of waste incineration power plants have been put into construction in China. In waste incineration power plants, a large amount of flammable, toxic and harmful gases, such as methane, will be produced in the leachate pit due to the fermentation process of the leachate. The concentration of these harmful gases will fluctuate with the changes in the amount of leachate, the type of garbage and the ventilation conditions in the pit.

[0003] At present, the common practice in the industry is to install a gas concentration monitoring device in the leachate pit. The operating personnel check the concentration of harmful gases and manually judge whether to start or stop the ventilation fan.

[0004] However, the harmful gases in the leachate pit change quickly and in a complex manner. The observation and adjustment speed of the operators often cannot keep up with the changes in gas concentration, which can easily lead to untimely adjustments, resulting in increased concentrations of harmful gases in the pit and causing safety hazards. In addition, if all ventilation fans are turned on for a long time to avoid safety hazards, it will waste electricity and shorten the service life of the fans, which will have an adverse impact on the economic efficiency of the operation.

[0005] How to avoid safety hazards caused by increased concentration of harmful gases in the pit with lower resource consumption is an issue that needs attention. Summary of the invention

[0006] In view of the above problems, the present application provides a method, system, equipment and storage medium for automatically adjusting the concentration of harmful gases in a landfill leachate pit, so as to automatically adjust the concentration of harmful gases in the landfill leachate pit in real time on the basis of low resource consumption, thereby avoiding safety hazards caused by increased concentration of harmful gases.

[0007] In order to achieve the above objectives, the specific plan is proposed as follows:

[0008] A method for automatically adjusting the concentration of harmful gases in a garbage leachate pit is applied to an automatic adjustment system, wherein the automatic adjustment system is connected to a gas monitoring device, and the gas monitoring device is installed in the garbage leachate pit. The automatic adjustment system is also connected to a fan control system, and the fan control system is used to control the operation of a first fan and a second fan, wherein the first fan is in a normally open state and the second fan is in a normally stopped state;

[0009] The method includes:

[0010] The concentration of various harmful gases in the garbage leachate pit is monitored in real time by the gas monitoring device;

[0011] Among various harmful gases, if there is a harmful gas whose concentration exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas, otherwise the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state;

[0012] After the second fan is turned on, if it is monitored that there is no harmful gas among the various harmful gases that exceeds the respective concentration safety threshold, the fan control system is driven to shut down the second fan.

[0013] Optionally, the various harmful gases include methane gas,

[0014] If, among various harmful gases, there is a harmful gas whose concentration exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas, otherwise the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state, including:

[0015] If the concentration of methane gas among various harmful gases exceeds the safe concentration threshold of methane gas, the fan control system is driven to start the second fan to disperse the methane gas;

[0016] If the concentration of methane gas does not exceed the safe threshold of the concentration of methane gas, the first fan is maintained in a normally-on state and the second fan is maintained in a normally-off state.

[0017] Optionally, the automatic adjustment system is connected to an alarm.

[0018] The method further includes:

[0019] After the second fan is turned on, if the continuous operation time of the second fan exceeds the preset time, the driving alarm will sound to notify the staff in the management range of the garbage leachate pit to manually intervene and handle the problem.

[0020] Optionally, the method further includes:

[0021] After the second fan is turned on, if the continuous operation time of the second fan exceeds the preset time, a message requesting artificial reduction of the concentration of harmful gases is sent to the control end.

[0022] An automatic regulating system for the concentration of harmful gases in a garbage leachate pit, wherein the automatic regulating system is connected to a gas monitoring device, wherein the gas monitoring device is installed in the garbage leachate pit, and the automatic regulating system is also connected to a fan control system, wherein the fan control system is used to control the operation of a first fan and a second fan, wherein the first fan is in a normally open state and the second fan is in a normally stopped state;

[0023] The automatic adjustment system comprises:

[0024] A harmful gas concentration acquisition unit, used to monitor the concentration of various harmful gases in the garbage leachate pit in real time through the gas monitoring device;

[0025] A harmful gas concentration threshold judgment unit, used to drive the fan control system to turn on the second fan to disperse the harmful gas if the concentration of the harmful gas exceeds the concentration safety threshold among various harmful gases, otherwise maintain the first fan in a normally open state and the second fan in a normally stopped state;

[0026] The second fan driving and shutting down unit is used to drive the fan control system to shut down the second fan after the second fan is turned on, if it is monitored that there is no harmful gas among the various harmful gases exceeding the respective concentration safety threshold.

[0027] Optionally, the various harmful gases include methane gas,

[0028] The harmful gas concentration threshold determination unit comprises:

[0029] A methane concentration threshold judgment first unit is used to drive the fan control system to start the second fan to disperse the methane gas if the concentration of methane gas exceeds the concentration safety threshold of methane gas among various harmful gases;

[0030] The second methane concentration threshold judgment unit is used to maintain the first fan in a normally-on state and the second fan in a normally-off state if the concentration of the methane gas does not exceed the safe concentration threshold of the methane gas.

[0031] Optionally, the automatic adjustment system is connected to an alarm.

[0032] The automatic adjustment system also includes:

[0033] The alarm sounding driving unit is used to drive the alarm to sound after the second fan is turned on, if the continuous operation time of the second fan exceeds a preset time, so as to notify the staff within the scope of managing the garbage leachate pit to manually intervene and handle the problem.

[0034] Optionally, the automatic adjustment system further includes:

[0035] A request information sending unit is used to send information requesting artificial reduction of the concentration of harmful gases to the control end if the continuous operation time of the second fan exceeds a preset time after the second fan is turned on.

[0036] An automatic regulating device for the concentration of harmful gases in a garbage leachate pit, comprising a memory and a processor;

[0037] The memory is used to store programs;

[0038] The processor is used to execute the program to implement the various steps of the method for automatically adjusting the concentration of harmful gases in the garbage leachate pit as described above.

[0039] A storage medium stores a computer program, which, when executed by a processor, implements the various steps of the method for automatically adjusting the concentration of harmful gases in a garbage leachate pit as described above.

[0040] By means of the above technical solution, the present application monitors the concentration of various harmful gases in the garbage leachate pit in real time through a gas monitoring device, and determines whether there are any harmful gases whose concentration exceeds the safety threshold value among the various harmful gases, and then drives the fan control system to turn on the second fan to disperse the harmful gases, otherwise, the first fan is kept in the normally open state and the second fan is kept in the normally stopped state. After the second fan is turned on, if it is detected that there are no harmful gases among the various harmful gases that exceed the safety threshold value of their respective concentrations, then the fan control system is driven to shut down the second fan. It can be seen that the second fan is turned on and off based on the real-time monitoring of the concentration of harmful gases in the pit, thereby realizing the automatic adjustment of the concentration of harmful gases, and avoiding the increase of the concentration of harmful gases in the pit to cause safety hazards without excessive use of the second fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0042] Figure 1 A system structure diagram for realizing automatic regulation of harmful gas concentration in a landfill leachate pit provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of a process for realizing automatic regulation of the concentration of harmful gases in a garbage leachate pit provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the unit structure of a system for automatically adjusting the concentration of harmful gases in a landfill leachate pit provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a device for automatically adjusting the concentration of harmful gases in a landfill leachate pit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Figure 1 An optional system structure for realizing automatic regulation of the concentration of harmful gases in a landfill leachate pit provided in the embodiment of the present application is as follows: Figure 1 As shown, the system architecture may include:

[0048] Automatic adjustment system 10 , gas monitoring device 20 and fan control system 30 .

[0049] Specifically, the gas monitoring device 20 is connected to the automatic regulating system 10 . The automatic regulating system 10 is connected to the fan control system 30 .

[0050] Among them, the automatic adjustment system 10 can be a distributed control system (DCS system). The gas monitoring device 20 can be installed in the garbage leachate pit, and can detect the concentration of various harmful gases in the pit in real time. The fan control system 30 can control the operation of the first fan 31 and the second fan 32. The first fan 31 and the second fan 32 are both located in the garbage leachate pit. The first fan 31 is in a normally open state and is generally kept open. The second fan 32 is in a normally stopped state and is only turned on when it is necessary to dispel harmful gases or reduce the concentration of harmful gases.

[0051] The gas monitoring device 20 and the automatic regulating system 10 can be connected by communication, and the automatic regulating system 10 and the fan control system 30 can be connected by communication. The automatic regulating system 10 can transmit the harmful gas concentration signal to the gas monitoring device 20, and the gas monitoring device 20 can send a fan control instruction to the fan control system 30.

[0052] based on Figure 1 The system structure shown in Figure 2 A schematic diagram of a process for automatically adjusting the concentration of harmful gases in a garbage leachate pit provided in an embodiment of the present application is shown. Figure 2 , the process may include:

[0053] Step S110: monitor the concentration of various harmful gases in the landfill leachate pit in real time through a gas monitoring device.

[0054] Step S120: among various harmful gases, if there is a harmful gas whose concentration exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas; otherwise, the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state.

[0055] It is understandable that when the concentration of harmful gases in the pit is higher than the concentration safety threshold, it indicates that the fermentation of the garbage leachate in the pit is intensified. At this time, the operation of the first fan 31 alone is not enough to dispel the harmful gases or reduce the concentration of the harmful gases. In this case, the second fan 32 can be turned on to further dispel the harmful gases or reduce the concentration of the harmful gases. If the concentration of harmful gases is within the safe range, there is no need to start the second fan 32, but the first fan 31 still needs to be kept on.

[0056] Step S130: After the second fan is turned on, if it is monitored that there is no harmful gas among the various harmful gases that exceeds the respective concentration safety threshold, the fan control system is driven to shut down the second fan.

[0057] It is understandable that the turning on of the second fan indicates that the concentration of harmful gases is too high. If the concentration of harmful gases is monitored to be within a safe range, the second fan 32 can be shut down to extend the service life of the second fan 32.

[0058] The method for automatically adjusting the concentration of harmful gases in a garbage leachate pit provided in this embodiment monitors the concentration of various harmful gases in the garbage leachate pit in real time through a gas monitoring device, and determines whether there is any harmful gas whose concentration exceeds its concentration safety threshold among the various harmful gases, and then drives the fan control system to turn on the second fan to disperse the harmful gas, otherwise, the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state. After the second fan is turned on, if it is detected that there is no harmful gas among the various harmful gases that exceeds their respective concentration safety thresholds, then the fan control system is driven to shut down the second fan. It can be seen that the second fan is controlled to start and stop based on the real-time monitoring of the concentration of harmful gases in the pit, thereby realizing automatic adjustment of the concentration of harmful gases, and the increase of the concentration of harmful gases in the pit can avoid safety hazards caused by excessive use of the second fan.

[0059] In some embodiments of the present application, the harmful gas mentioned in the above embodiment is introduced. The components of the harmful gas may include methane gas. Based on this, the step S120 mentioned in the above embodiment, among various harmful gases, if the concentration of the harmful gas exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas, otherwise the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state, which may include:

[0060] S1. Among various harmful gases, if the concentration of methane gas exceeds the safe concentration threshold of methane gas, the fan control system is driven to start the second fan to disperse the methane gas.

[0061] S2. If the concentration of methane gas does not exceed the safe concentration threshold of methane gas, the first fan is kept in a normally-on state and the second fan is kept in a normally-off state.

[0062] Specifically, the safety threshold of methane gas concentration is 25%LEL, so the safety range of methane gas concentration is 0~25%LEL. When the methane concentration is less than or equal to 25%LEL, the first fan 31 can be kept running, and the second fan 32 does not need to be turned on. When the methane concentration is greater than 25%LEL, the second fan 32 can be turned on to disperse the methane gas to reduce the methane gas concentration. Further, the second fan 32 is stopped until the methane gas concentration drops to 25%LEL.

[0063] Taking into account that the concentration of harmful gases in the pit remains high for a long time, it is also prone to safety hazards, which require timely manual intervention. Based on this, the automatic adjustment system 10 mentioned in the aforementioned embodiment is further introduced. The automatic adjustment system 10 can also be connected to an alarm, so that after the second fan 32 is turned on, if the continuous operation time of the second fan exceeds the preset time, the alarm is driven to sound to notify the staff within the scope of the management of the garbage leachate pit to intervene manually.

[0064] Specifically, the preset time may represent the effective time for reducing the concentration of harmful gases after the second fan 32 is turned on.

[0065] It is understandable that if the concentration of harmful gases has not been reduced to a safe range after the second fan 32 is turned on for more than the preset time, manual intervention is required. Specifically, an alarm can be driven to sound to notify the staff within the scope of the management of the leachate pit to intervene manually.

[0066] In addition, information requesting artificial reduction of harmful gas concentrations can be sent to the control end, so that the staff within the leachate pit can be notified through the control end, so that the situation where the harmful gas concentration in the pit remains high for a long time can be dealt with in a timely manner.

[0067] The following is a description of the system for automatically adjusting the concentration of harmful gases in a garbage leachate pit provided in an embodiment of the present application. The system for automatically adjusting the concentration of harmful gases in a garbage leachate pit described below and the method for automatically adjusting the concentration of harmful gases in a garbage leachate pit described above can be referenced to each other.

[0068] See also Figure 3 , Figure 3 This is a schematic diagram of the unit structure of a system for automatically adjusting the concentration of harmful gases in a landfill leachate pit disclosed in an embodiment of the present application.

[0069] like Figure 3 As shown, the automatic adjustment system may include:

[0070] The harmful gas concentration acquisition unit 11 is used to monitor the concentration of various harmful gases in the garbage leachate pit in real time through a gas monitoring device;

[0071] A harmful gas concentration threshold judgment unit 12 is used to drive the fan control system to turn on the second fan to disperse the harmful gas if the concentration of the harmful gas exceeds the concentration safety threshold among various harmful gases, otherwise, the first fan is kept in a normally open state and the second fan is kept in a normally stopped state;

[0072] The second fan driving and shutting down unit 13 is used to drive the fan control system to shut down the second fan after the second fan is turned on if it is monitored that no harmful gas among various harmful gases exceeds the respective concentration safety threshold.

[0073] Optionally, the various harmful gases include methane gas,

[0074] The harmful gas concentration threshold determination unit comprises:

[0075] A methane concentration threshold judgment first unit is used to drive the fan control system to start the second fan to disperse the methane gas if the concentration of methane gas exceeds the concentration safety threshold of methane gas among various harmful gases;

[0076] The second methane concentration threshold judgment unit is used to maintain the first fan in a normally-on state and the second fan in a normally-off state if the concentration of the methane gas does not exceed the safe concentration threshold of the methane gas.

[0077] Optionally, the automatic adjustment system is connected to an alarm.

[0078] The automatic adjustment system also includes:

[0079] The alarm sounding driving unit is used to drive the alarm to sound after the second fan is turned on, if the continuous operation time of the second fan exceeds a preset time, so as to notify the staff within the scope of managing the garbage leachate pit to manually intervene and handle the problem.

[0080] Optionally, the automatic adjustment system further includes:

[0081] A request information sending unit is used to send information requesting artificial reduction of the concentration of harmful gases to the control end if the continuous operation time of the second fan exceeds a preset time after the second fan is turned on.

[0082] The automatic regulation system for the concentration of harmful gases in a landfill leachate pit provided in the embodiment of the present application can be applied to the automatic regulation system for the concentration of harmful gases in a landfill leachate pit. Figure 4The hardware structure diagram of the automatic regulation system of harmful gas concentration in the garbage leachate pit is shown in FIG. Figure 4 , the hardware structure of the automatic regulation system of harmful gas concentration in the landfill leachate pit may include: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4;

[0083] In the embodiment of the present application, the number of the processor 1, the communication interface 2, the memory 3, and the communication bus 4 is at least one, and the processor 1, the communication interface 2, and the memory 3 communicate with each other through the communication bus 4;

[0084] The processor 1 may be a central processing unit CPU, or an application-specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention, etc.;

[0085] The memory 3 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), etc., such as at least one disk memory;

[0086] The memory stores a program, and the processor can call the program stored in the memory, wherein the program is used to:

[0087] The concentration of various harmful gases in the landfill leachate pit is monitored in real time through the gas monitoring device;

[0088] Among various harmful gases, if there is a harmful gas whose concentration exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas, otherwise the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state;

[0089] After the second fan is turned on, if it is monitored that there is no harmful gas among the various harmful gases that exceeds the respective concentration safety threshold, the fan control system is driven to shut down the second fan.

[0090] Optionally, the detailed functions and extended functions of the program may refer to the above description.

[0091] The embodiment of the present application further provides a storage medium, which may store a program suitable for execution by a processor, wherein the program is used to:

[0092] The concentration of various harmful gases in the landfill leachate pit is monitored in real time through the gas monitoring device;

[0093] Among various harmful gases, if there is a harmful gas whose concentration exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas, otherwise the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state;

[0094] After the second fan is turned on, if it is monitored that there is no harmful gas among the various harmful gases that exceeds the respective concentration safety threshold, the fan control system is driven to shut down the second fan.

[0095] Optionally, the detailed functions and extended functions of the program may refer to the above description.

[0096] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0097] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can refer to each other.

[0098] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for automatically adjusting the concentration of harmful gases in a landfill leachate pit, characterized in that: Applied to an automatic adjustment system, the automatic adjustment system is connected to a gas monitoring device, the gas monitoring device is installed in a garbage leachate pit, the automatic adjustment system is also connected to a fan control system, the fan control system is used to control the operation of a first fan and a second fan, the first fan is in a normally open state, and the second fan is in a normally stopped state; The method includes: The concentration of various harmful gases in the garbage leachate pit is monitored in real time by the gas monitoring device; Among various harmful gases, if there is a harmful gas whose concentration exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas, otherwise the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state; After the second fan is turned on, if it is monitored that there is no harmful gas among the various harmful gases that exceeds the respective concentration safety threshold, the fan control system is driven to shut down the second fan.

2. The method according to claim 1, characterized in that The various harmful gases include methane gas, If, among various harmful gases, there is a harmful gas whose concentration exceeds its concentration safety threshold, the fan control system is driven to turn on the second fan to disperse the harmful gas, otherwise the first fan is maintained in a normally open state and the second fan is maintained in a normally stopped state, including: If the concentration of methane gas among various harmful gases exceeds the safe concentration threshold of methane gas, the fan control system is driven to start the second fan to disperse the methane gas; If the concentration of methane gas does not exceed the safe threshold of the concentration of methane gas, the first fan is maintained in a normally-on state and the second fan is maintained in a normally-off state.

3. The method according to claim 1 or 2, characterized in that: The automatic adjustment system is connected to an alarm. The method further includes: After the second fan is turned on, if the continuous operation time of the second fan exceeds the preset time, the driving alarm will sound to notify the staff in the management range of the garbage leachate pit to manually intervene and handle the problem.

4. The method according to claim 1 or 2, characterized in that: Also includes: After the second fan is turned on, if the continuous operation time of the second fan exceeds the preset time, a message requesting artificial reduction of the concentration of harmful gases is sent to the control end.

5. An automatic control system for the concentration of harmful gases in a landfill leachate pit, characterized in that: The automatic adjustment system is connected to a gas monitoring device, which is installed in a garbage leachate pit. The automatic adjustment system is also connected to a fan control system, which is used to control the operation of a first fan and a second fan, wherein the first fan is in a normally open state and the second fan is in a normally stopped state; The automatic adjustment system comprises: A harmful gas concentration acquisition unit, used to monitor the concentration of various harmful gases in the garbage leachate pit in real time through the gas monitoring device; A harmful gas concentration threshold judgment unit, used to drive the fan control system to turn on the second fan to disperse the harmful gas if the concentration of the harmful gas exceeds the concentration safety threshold among various harmful gases, otherwise maintain the first fan in a normally open state and the second fan in a normally stopped state; The second fan driving and shutting down unit is used to drive the fan control system to shut down the second fan after the second fan is turned on, if it is monitored that there is no harmful gas among the various harmful gases exceeding the respective concentration safety threshold.

6. The automatic adjustment system according to claim 5, characterized in that: The various harmful gases include methane gas, The harmful gas concentration threshold determination unit includes: A methane concentration threshold judgment first unit is used to drive the fan control system to start the second fan to disperse the methane gas if the concentration of methane gas exceeds the concentration safety threshold of methane gas among various harmful gases; The second methane concentration threshold judgment unit is used to maintain the first fan in a normally-on state and the second fan in a normally-off state if the concentration of the methane gas does not exceed the safe concentration threshold of the methane gas.

7. The automatic adjustment system according to claim 5 or 6, characterized in that: The automatic adjustment system is connected to an alarm. The automatic adjustment system also includes: The alarm sounding driving unit is used to drive the alarm to sound after the second fan is turned on, if the continuous operation time of the second fan exceeds a preset time, so as to notify the staff within the scope of managing the garbage leachate pit to manually intervene and handle the problem.

8. The automatic adjustment system according to claim 5 or 6, characterized in that: Also includes: A request information sending unit is used to send information requesting artificial reduction of the concentration of harmful gases to the control end if the continuous operation time of the second fan exceeds a preset time after the second fan is turned on.

9. An automatic regulating device for the concentration of harmful gases in a landfill leachate pit, characterized in that: including memory and processor; The memory is used to store programs; The processor is used to execute the program to implement the various steps of the method for automatically adjusting the concentration of harmful gases in a landfill leachate pit as described in any one of claims 1 to 4.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the various steps of the method for automatically adjusting the concentration of harmful gases in a landfill leachate pit as described in claims 1-4 are implemented.

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