Intelligent system and method for condensate separation of exhaust well of landfill

Abstract

The invention relates to the technical field of environmental engineering, and discloses an intelligent system and method for condensate separation of an exhaust well of a landfill, and the intelligent system is composed of a Z-shaped condensation pipe, a water collecting pipe, an exhaust fan, a water level monitoring device, a hygrothermograph A, a hygrothermograph B and a central control system. The Z-shaped condensation pipe is connected to the rear end of the gas extraction well pipe and is composed of a front pipe, a middle pipe and a rear pipe. And the lower end of the water collecting pipe is connected with a drain pipe through a drain valve. The exhaust fan is communicated with the condensation pipe rear pipe through an exhaust pipeline, and a branch pipe valve is arranged at the tail end of the rear pipe. The water level monitoring device monitors the liquid level of the water collecting pipe, the hygrothermometers A and B monitor the temperature and humidity of landfill in the front pipe and the rear pipe, and the central control system controls the branch pipe valves, the exhaust fan and the drainage valve according to signals of all the devices, so that condensate is intelligently separated. The central control system intelligently adjusts the air exhaust rate and drainage operation according to data, automatic control is achieved in the whole process, personal errors and labor intensity are reduced, water vapor condensation is effectively promoted, and the condensate separation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental engineering, and particularly relates to an intelligent system and method for separating condensate from landfill extraction wells. Background Art

[0002] In domestic waste landfills, anaerobic fermentation of garbage generates a large amount of landfill gas, which needs to be fully drained to avoid safety and environmental protection risks caused by the accumulation or leakage of landfill gas. In the restoration or exploitation of domestic waste landfills, it is also necessary to inject and extract gas into the garbage mass forcibly to promote the degradation of garbage or the reduction of the concentration of landfill gas pollutants. Due to the high temperature, a large amount of leachate, and high water content in the garbage mass, the extracted landfill gas usually has the characteristics of high temperature and high humidity.

[0003] For the landfill gas extracted by aerobic extraction wells, a steam-water separator is usually set on the extraction pipeline to separate the water vapor in the landfill gas. For example, both the invention patents "Rapid Stabilization System for Landfill" (CN 112893384B) and "Gas-Liquid Combined System for Rapid Reduction of Garbage in Landfill" (CN 114393002B) mention setting a steam-water separator or a dehydration component at the inlet of the extraction fan.

[0004] However, when the landfill gas is transported in the extraction pipeline, it will gradually cool down, resulting in the condensation of water vapor in the pipeline. The accumulation of condensate will hinder the smooth extraction, and even cause the pipeline to be blocked, affecting the extraction efficiency. In view of this, we propose an intelligent system and method for separating condensate from landfill extraction wells, which can effectively separate the condensate in the landfill extraction wells, improve the extraction efficiency, avoid pipeline blockage caused by the accumulation of condensate, and ensure the stable operation of the landfill gas extraction system to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that when the landfill gas is transported in the extraction pipeline in the above-mentioned prior art, it causes the condensation of water vapor in the pipeline, hinders the extraction, causes the pipeline to be blocked, and affects the extraction efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An intelligent system for separating condensate from landfill extraction wells, comprising:

[0008] A Z-shaped condensate pipe, which is connected to the rear end of the landfill gas extraction well pipe. The Z-shaped condensate pipe is composed of a front condensate pipe, a middle condensate pipe, and a rear condensate pipe connected in sequence;

[0009] A water collecting pipe. The upper end of the water collecting pipe is connected to the lower end of the middle condensate pipe and the front end of the rear condensate pipe through a tee, and the tee is at the lowest position of the middle condensate pipe and the rear condensate pipe. The lower end of the water collecting pipe is connected to a drain valve, and the lower end of the drain valve is connected to a drain pipe;

[0010] An air extraction fan is connected to the rear pipe of the condenser pipe through an air extraction pipeline. The air extraction fan is used to cooperate with the Z-shaped condenser pipe for air extraction. A branch valve connected to the air extraction pipeline is provided at the end of the rear pipe of the condenser pipe;

[0011] A water level monitoring device is arranged on the water collecting pipe and is used to monitor whether the liquid level in the water collecting pipe rises to the three-way connection;

[0012] A thermometer and hygrometer A and a thermometer and hygrometer B. The thermometer and hygrometer A is arranged on the front pipe of the condenser pipe and is used to monitor the temperature and humidity of the landfill gas in the front pipe of the condenser pipe; the thermometer and hygrometer B is arranged on the rear pipe of the condenser pipe and is used to monitor the temperature and humidity of the landfill gas in the rear pipe of the condenser pipe;

[0013] A central control system is respectively connected to the branch valve, the drain valve, the air extraction fan, the thermometer and hygrometer A, the thermometer and hygrometer B, and the water level monitoring device, and controls the action of the branch valve, the air extraction fan, and the opening and closing of the drain valve by receiving the water level signal of the water level monitoring device.

[0014] Preferably, the front end of the front pipe of the condenser pipe is connected to the air extraction well pipe, and the front pipe of the condenser pipe is arranged upward along the moving direction of the landfill gas to avoid forming water accumulation in low-lying areas; the high-temperature and high-humidity landfill gas in the air extraction well pipe is transmitted upward along the front pipe of the condenser pipe, and the water vapor is continuously condensed and flows back downward into the air extraction well pipe.

[0015] Preferably, the rear pipe of the condenser pipe is arranged upward along the moving direction of the landfill gas to avoid forming water accumulation in low-lying areas. The rear pipe of the condenser pipe further condenses the landfill gas that is not fully condensed in the front pipe of the condenser pipe, and the condensed landfill gas forms condensed water and flows downward into the water collecting pipe.

[0016] Preferably, the front pipe of the condenser pipe is in a straight line, zigzag or spiral shape that is upward and has no low-lying points in the middle.

[0017] Preferably, the front pipe of the condenser pipe is made of plastic material or stainless steel material.

[0018] The straight front pipe of the condenser pipe is simple to process, has small air resistance, and fast condensed water reflux; the zigzag or spiral front pipe of the condenser pipe can increase the condensation contact area; the plastic front pipe of the condenser pipe is corrosion-resistant, and the stainless steel front pipe of the condenser pipe has a fast heat exchange rate.

[0019] Preferably, the end of the drain pipe far from the drain valve is connected to the air extraction well pipe, the leachate drainage pipe or the leachate recharge well.

[0020] Preferably, the water level monitoring device is a water level gauge or a water level viewing window provided in the collecting pipe. When the water level is high, the air extraction fan is turned off or the air extraction branch pipe valve is closed, and then the drain valve is opened to drain water; after the condensate is drained, the drain valve is closed, and the air extraction fan is turned on or the air extraction branch pipe valve is opened.

[0021] A method for separating condensate in a landfill gas extraction well, which is applied to an intelligent system for separating condensate in a landfill gas extraction well. The method includes:

[0022] The central control system receives the signal that the liquid level in the collecting pipe rises to the tee joint, and automatically closes or reduces the valve of the branch pipe, or automatically closes or reduces the power of the air extraction fan, and then automatically opens the drain valve. After the central control system feeds back that the condensate in the collecting pipe is drained, the drain valve is automatically closed, and the valve of the branch pipe is opened or increased, or the power of the air extraction fan is opened or increased;

[0023] Before the liquid level in the collecting pipe rises to the tee joint, if the humidity of the front pipe of the condensate pipe does not reach or is not close to the saturation humidity corresponding to the temperature of the front pipe of the condensate pipe, and the humidity of the gas in the rear pipe of the condensate pipe does not reach or is not close to the saturation humidity corresponding to the temperature of the rear pipe of the condensate pipe, the central control system receives the signal and automatically increases the valve of the branch pipe or the power of the air extraction fan to increase the air extraction speed of the air extraction pipeline and accelerate the air extraction rate;

[0024] On the contrary, before the liquid level in the collecting pipe rises to the tee joint, if the humidity of the front pipe of the condensate pipe reaches or is close to the saturation humidity corresponding to the temperature of the front pipe of the condensate pipe, or the humidity of the gas in the rear pipe of the condensate pipe reaches or is close to the saturation humidity corresponding to the temperature of the rear pipe of the condensate pipe, the central control system receives the signal and automatically reduces the valve of the branch pipe or the power of the air extraction fan to reduce the air extraction speed, so that the water vapor in the landfill gas can be fully condensed and separated in the front pipe and the rear pipe of the condensate pipe.

[0025] Compared with the prior art, the technical effects and advantages of the present invention are:

[0026] The present invention mainly realizes its functions based on the characteristics of landfill gas and the coordinated operation of related devices. High-temperature and high-humidity landfill gas enters the Z-shaped condenser pipe from the extraction well pipe. Both the front pipe and the rear pipe of the condenser pipe are arranged upward without low-lying areas. During the upward movement of the landfill gas, the temperature gradually decreases, and water vapor continuously condenses. Different shapes and materials of the front pipe of the condenser pipe can be selected as needed to achieve different condensation effects. The landfill gas that is not fully condensed enters the rear pipe of the condenser pipe for further condensation, and the condensed water flows into the water collection pipe. The water level monitoring device monitors the liquid level of the water collection pipe in real time. When the liquid level rises to the tee joint, the signal is transmitted to the central control system. The central control system closes the extraction fan or the branch valve and opens the drain valve to drain water; after the drainage is completed, the extraction is resumed. At the same time, thermohygrometers A and B respectively monitor the temperature and humidity of the landfill gas in the front and rear pipes, and the central control system adjusts the valve of the branch valve or the power of the extraction fan according to the data to control the extraction air speed.

[0027] Through the special design of the Z-shaped condenser pipe of the present invention, including the upward arrangement to avoid water accumulation and the selection of different shapes and materials, the water vapor in the landfill gas can be effectively condensed sufficiently, the separation efficiency of the condensate can be improved, and the content of water vapor entering the extraction system can be reduced. At the same time, the condensed water can be discharged in time to avoid accumulation in the extraction pipeline, prevent pipeline blockage caused by water accumulation, ensure the smooth progress of extraction, and maintain the stable operation of the landfill gas extraction system. In addition, the selection of various shapes and materials for the front pipe of the condenser pipe enables the system to be flexibly configured according to the specific characteristics of the landfill gas and the actual on-site requirements, better adapt to the working conditions of different landfills, and improve the versatility and reliability of the system.

[0028] According to the data of the thermohygrometer and the water level monitoring device, the central control system of the present invention can intelligently adjust the extraction rate and drainage operation. While ensuring sufficient condensation, the extraction air speed can be flexibly adjusted according to the actual situation, which not only improves the processing capacity of the system but also optimizes energy utilization and avoids unnecessary energy consumption. For example, when the water vapor content is high, the extraction air speed is reduced to promote condensation, and when the water vapor content is low, the extraction air speed is increased to speed up the processing process. The whole process is automatically controlled by the central control system without frequent manual intervention, reducing human operation errors and labor intensity, improving the reliability and stability of the system operation, and being able to continuously and efficiently achieve the separation of the condensate in the extraction well of the landfill. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the Z-shaped condenser pipe of the present invention;

[0030] Figure 2 It is a schematic structural diagram of the central control system of the present invention for adjusting the valve of the branch valve;

[0031] Figure 3 It is a schematic structural diagram of the central control system of the present invention for adjusting the frequency of the extraction fan;

[0032] Figure 4 This is the block diagram of the connection relationship of the present invention.

[0033] In the figure: 1. Z-shaped condenser; 101. Front pipe of the condenser; 102. Middle pipe of the condenser; 103. Rear pipe of the condenser; 2. Water collecting pipe; 3. Drain valve; 4. Drain pipe; 5. Exhaust fan; 6. Exhaust pipe; 7. Branch valve; 8. Water level monitoring device; 9. Temperature and humidity meter A; 10. Temperature and humidity meter B; 11. Central control system. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] The following is combined with Figures 1 to 4 to further elaborate on this application.

[0036] An intelligent system for separating condensate in a landfill gas extraction well according to an embodiment of the present application includes a Z-shaped condenser 1, a water collecting pipe 2, an exhaust fan 5, a water level monitoring device 8, a temperature and humidity meter A 9, a temperature and humidity meter B 10, and a central control system 11;

[0037] The Z-shaped condenser 1 is connected to the rear end of the landfill gas extraction well pipe. The Z-shaped condenser 1 is composed of a front pipe 101 of the condenser, a middle pipe 102 of the condenser, and a rear pipe 103 of the condenser connected in sequence. The front end of the front pipe 101 of the condenser is connected to the extraction well pipe, and the front pipe 101 of the condenser is arranged upward along the moving direction of the landfill gas to avoid forming water accumulation in low-lying areas. The high-temperature and high-humidity landfill gas in the extraction well pipe is transmitted upward along the front pipe 101 of the condenser, and water vapor is continuously condensed and flows back downward into the extraction well pipe. The front pipe 101 of the condenser is in a linear, folded, or spiral shape that is upward and has no low-lying points in the middle. The front pipe 101 of the condenser is made of plastic or stainless steel. The linear front pipe 101 of the condenser is simple to process, has low wind resistance, and fast condensate water reflux. The folded or spiral front pipe 101 of the condenser can increase the condensation contact area. The plastic front pipe 101 of the condenser is corrosion-resistant, and the stainless steel front pipe 101 of the condenser has a fast heat transfer rate.

[0038] The rear pipe 103 of the condenser is arranged upward along the moving direction of the landfill gas to avoid forming water accumulation in low-lying areas. The rear pipe 103 of the condenser further condenses the landfill gas that is not fully condensed in the front pipe 101 of the condenser, and the condensed landfill gas forms condensate water and flows downward into the water collecting pipe 2.

[0039] The upper end of the collecting pipe 2 is connected to the lower end of the middle pipe 102 of the condenser pipe and the front end of the rear pipe 103 of the condenser pipe through a tee, and the tee is at the lowest position of the middle pipe 102 and the rear pipe 103 of the condenser pipe. The lower end of the collecting pipe 2 is connected to the drain valve 3, and the lower end of the drain valve 3 is connected to the drain pipe 4; one end of the drain pipe 4 away from the drain valve 3 is connected to the air extraction well pipe, the leachate drainage pipe or the leachate recharge well.

[0040] The air extraction fan 5 is connected to the rear pipe 103 of the condenser pipe through the air extraction pipeline 6. The air extraction fan 5 is used to cooperate with the Z-shaped condenser pipe 1 for air extraction. A branch valve 7 connected to the air extraction pipeline 6 is provided at the end of the rear pipe 103 of the condenser pipe;

[0041] The water level monitoring device 8 is arranged on the collecting pipe 2 and is used to monitor whether the liquid level in the collecting pipe 2 rises to the tee connection; the water level monitoring device 8 is a water level gauge or a water level perspective window arranged in the collecting pipe 2. When the water level is high, the air extraction fan 5 or the air extraction branch valve 7 is closed, and then the drain valve 3 is opened for drainage; after the condensate is drained, the drain valve 3 is closed, and the air extraction fan 5 or the air extraction branch valve 7 is opened.

[0042] The temperature and humidity meter A9 is arranged on the front pipe 101 of the condenser pipe and is used to monitor the temperature and humidity of the landfill gas in the front pipe 101 of the condenser pipe; the temperature and humidity meter B10 is arranged on the rear pipe 103 of the condenser pipe and is used to monitor the temperature and humidity of the landfill gas in the rear pipe 103 of the condenser pipe;

[0043] The central control system 11 is respectively connected to the branch valve 7, the drain valve 3, the air extraction fan 5, the temperature and humidity meter A9, the temperature and humidity meter B10 and the water level monitoring device 8, and controls the action of the branch valve 7, the air extraction fan 5 and the opening and closing of the drain valve 3 by receiving the water level signal of the water level monitoring device 8.

[0044] The condensation process is as follows:

[0045] The high-temperature and high-humidity landfill gas enters the pipeline connected to the front end of the front pipe 101 of the condenser pipe from the air extraction well pipe and moves along the upwardly arranged front pipe 101 of the condenser pipe. Since the front pipe 101 of the condenser pipe is upward and has no low-lying places, the temperature of the landfill gas gradually decreases during the rising process, and the water vapor therein continuously condenses, and the condensed water flows downward back to the air extraction well pipe. Different shapes (linear, folded or spiral) and materials (plastic or stainless steel) of the front pipe 101 of the condenser pipe can be selected according to actual needs to achieve different condensation effects. The linear type is simple to process, has small wind resistance and fast condensate reflux; the folded or spiral type can increase the condensation contact area and improve the condensation efficiency; the plastic material is corrosion-resistant, and the stainless steel material has a fast heat exchange rate.

[0046] The landfill gas that is not fully condensed in the front pipe 101 of the condenser pipe enters the rear pipe 103 of the condenser pipe arranged upward along the moving direction of the landfill gas. After further condensation, the condensed water flows downward into the collecting pipe 2.

[0047] Liquid level monitoring and drainage control:

[0048] The water level monitoring device 8 (water level gauge or water level perspective window) monitors the liquid level in the collecting pipe 2 in real time. When the liquid level rises to the three-way connection, the water level monitoring device 8 transmits a signal to the central control system 11.

[0049] After receiving the signal, the central control system 11 automatically closes the air extraction fan 5 or closes the air extraction branch valve 7 (achieved by controlling the branch valve 7), and then opens the drainage valve 3 to drain the condensate in the collecting pipe 2.

[0050] When the system feedback indicates that the condensate in the collecting pipe 2 has been drained completely, the central control system 11 closes the drainage valve 3, opens the air extraction fan 5 or opens the air extraction branch valve 7, and resumes air extraction.

[0051] Air extraction rate adjustment:

[0052] The temperature and humidity meter A9 monitors the temperature and humidity of the landfill gas in the front pipe 101 of the condenser, and the temperature and humidity meter B10 monitors the temperature and humidity of the landfill gas in the rear pipe 103 of the condenser, and transmits the data to the central control system 11.

[0053] Before the liquid level in the collecting pipe 2 rises to the three-way connection, if the humidity in the front pipe 101 of the condenser does not reach or is not close to the saturation humidity corresponding to the front pipe temperature, after receiving the signal from the temperature and humidity meter A9, the central control system 11 automatically enlarges the branch valve 7 (the air extraction branch of the air extraction fan 5), or increases the power of the air extraction fan 5 to increase the air extraction wind speed of this branch, accelerate the air extraction rate, make the landfill gas pass through the condenser faster, and improve the processing efficiency of the whole system.

[0054] If the humidity of the gas in the rear pipe 103 of the condenser reaches or is close to the saturation humidity corresponding to the rear pipe temperature, after receiving the signal from the temperature and humidity meter B10, the central control system 11 automatically reduces the branch valve 7 or reduces the power of the air extraction fan 5 to reduce the air extraction wind speed, so that the water vapor in the landfill gas can be fully condensed and separated in the front pipe 101 and the rear pipe 103 of the condenser, and avoid the situation that the water vapor cannot be fully condensed due to too fast air extraction.

[0055] The intelligent system for condensate separation of the landfill gas extraction well can effectively make the water vapor in the landfill gas fully condensed, improve the separation efficiency of the condensate, and reduce the water vapor content entering the air extraction system through the special design of the Z-shaped condenser 1, including upward layout to avoid water accumulation and different shape and material selections.

[0056] The timely discharge of the condensate avoids the accumulation of condensate in the air extraction pipeline, prevents pipeline blockage caused by water accumulation, ensures the smooth progress of air extraction, and maintains the stable operation of the landfill gas extraction system.

[0057] The central control system 11 intelligently adjusts the air extraction rate and drainage operation according to the data of the thermometer and the water level monitoring device 8. While ensuring sufficient condensation, it can flexibly adjust the air extraction wind speed according to the actual situation, which not only improves the processing capacity of the system but also optimizes energy utilization and avoids unnecessary energy consumption. For example, when the water vapor content is high, the air extraction wind speed is reduced to promote condensation, and when the water vapor content is low, the air extraction wind speed is increased to accelerate the processing process.

[0058] The selection of various shapes and materials for the front pipe 101 of the condenser tube enables the system to be flexibly configured according to the specific characteristics of the landfill gas (such as temperature, humidity, etc.) and the actual on-site requirements, better adapting to the working conditions of different landfills and improving the versatility and reliability of the system.

[0059] A method for separating condensate liquid in a landfill gas extraction well, which is applied to an intelligent system for separating condensate liquid in a landfill gas extraction well. The method includes:

[0060] The central control system 11 receives the signal that the liquid level in the water collecting pipe 2 rises to the three-way connection, and automatically closes or reduces the valve of the branch pipe valve 7, or automatically closes or reduces the power of the air extraction fan 5, and then automatically opens the drain valve 3. After the central control system 11 feeds back that the condensate water in the water collecting pipe 2 is drained completely, it then automatically closes the drain valve 3, opens or increases the valve of the branch pipe valve 7, or opens or increases the power of the air extraction fan 5;

[0061] Before the liquid level in the water collecting pipe 2 rises to the three-way connection, if the humidity of the front pipe 101 of the condenser tube does not reach or is not close to the saturated humidity corresponding to the temperature of the front pipe 101 of the condenser tube, and the humidity of the gas in the rear pipe 103 of the condenser tube does not reach or is not close to the saturated humidity corresponding to the temperature of the rear pipe 103 of the condenser tube, the central control system 11 receives the signal and automatically increases the valve of the branch pipe valve 7, or increases the power of the air extraction fan 5, to increase the air extraction wind speed of the air extraction pipeline 6 and accelerate the air extraction rate;

[0062] On the contrary, before the liquid level in the water collecting pipe 2 rises to the three-way connection, if the humidity of the front pipe 101 of the condenser tube reaches or is close to the saturated humidity corresponding to the temperature of the front pipe 101 of the condenser tube, or the humidity of the gas in the rear pipe 103 of the condenser tube reaches or is close to the saturated humidity corresponding to the temperature of the rear pipe 103 of the condenser tube, the central control system 11 receives the signal and automatically reduces the valve of the branch pipe valve 7 or reduces the power of the air extraction fan 5 to reduce the air extraction wind speed, so that the water vapor in the landfill gas can be fully condensed and separated in the front pipe 101 and the rear pipe 103 of the condenser tube.

[0063] The liquid level rise drainage control principle of the method for separating condensate liquid in the landfill gas extraction well is as follows:

[0064] When the liquid level in the collecting pipe 2 rises to the tee joint, the liquid level monitoring device (such as a water level gauge or a water level perspective window) will detect the signal and transmit it to the central control system 11.

[0065] After receiving the signal, based on the preset logic, the central control system 11 closes or reduces the valve of the branch pipe valve 7 by controlling the actuator (such as an electric control valve or a frequency converter), or automatically closes or reduces the power of the air extraction fan 5. This is to reduce the air extraction rate, reduce the entry of new landfill gas into the system, and prevent more water vapor from entering the collecting pipe 2 and causing the liquid level to rise further.

[0066] Then the drain valve 3 is automatically opened to drain the condensed water in the collecting pipe 2. During the drainage process, the central control system 11 continuously monitors the liquid level in the collecting pipe 2.

[0067] After the central control system 11 receives the feedback signal indicating that the condensed water in the collecting pipe 2 has been drained, the drain valve 3 is automatically closed and the branch pipe valve 7 is opened to restore the normal air extraction state.

[0068] The principle of adjusting the air extraction rate is as follows:

[0069] Before the liquid level in the collecting pipe 2 rises to the tee joint, if the humidity of the front pipe 101 of the condenser has not reached or is not close to the saturated humidity corresponding to the temperature of the front pipe 101 of the condenser, the temperature and humidity meter A9 monitors this state and transmits the signal to the central control system 11.

[0070] After receiving the signal, the central control system 11 automatically increases the valve of the branch pipe valve 7 or increases the power of the air extraction fan 5 by controlling the actuator. This will increase the air extraction speed of the air extraction pipeline 6, accelerate the air extraction rate, and allow the landfill gas to pass through the condenser faster to make full use of the condensation capacity of the condenser and improve the overall processing efficiency of the system.

[0071] When the humidity of the gas in the rear pipe 103 of the condenser reaches or is close to the saturated humidity corresponding to the temperature of the rear pipe 103 of the condenser, the temperature and humidity meter B10 monitors this state and transmits the signal to the central control system 11.

[0072] After receiving the signal, the central control system 11 automatically reduces the valve of the branch pipe valve 7 or reduces the power of the air extraction fan 5 to reduce the air extraction speed. This can allow the landfill gas to have more sufficient time for heat exchange in the front pipe 101 and the rear pipe 103 of the condenser, so that the water vapor can be fully condensed and separated, and prevent the water vapor from not being fully condensed due to too fast air extraction speed and affecting the separation effect.

[0073] By draining water in a timely manner when the liquid level rises, excessive accumulation of condensate water in the water collecting pipe 2 is avoided, preventing waterlogging from clogging the system, ensuring the smooth progress of the air extraction process, and maintaining the stable operation of the landfill gas extraction system. The air extraction wind speed is automatically adjusted according to the humidity conditions of the front pipe 101 and the rear pipe of the condenser pipe. While ensuring sufficient condensation of water vapor, the air extraction efficiency is improved. When the humidity of the front pipe 101 of the condenser pipe is not saturated, the air extraction is accelerated, which can make full use of the system processing capacity; when the humidity of the rear pipe 103 of the condenser pipe is close to saturation, the air extraction wind speed is reduced, which is conducive to the full condensation of water vapor, thus improving the performance of the entire condensate separation system.

[0074] The whole process is automatically controlled by the central control system 11, without frequent manual intervention, reducing human operation errors and labor intensity, improving the reliability and stability of the system operation, and being able to continuously and efficiently separate the condensate of the landfill gas extraction well.

[0075] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent system for separating condensate from landfill wells, characterized in that: include: A Z-shaped condenser (1) is connected to the rear end of the landfill gas extraction well pipe, and the Z-shaped condenser (1) is composed of a condenser front pipe (101), a condenser middle pipe (102), and a condenser rear pipe (103) which are connected in sequence; A water collecting pipe (2), wherein the upper end of the water collecting pipe (2) is connected to the lower end of the middle pipe (102) of the condenser and the front end of the rear pipe (103) of the condenser via a tee, and the tee is located at the lowest position of the middle pipe (102) of the condenser and the rear pipe (103) of the condenser, the lower end of the water collecting pipe (2) is connected to the drain valve (3), and the lower end of the drain valve (3) is connected to the drain pipe (4); An exhaust fan (5) is connected to the rear pipe (103) of the condenser tube via an exhaust pipeline (6), the exhaust fan (5) is used to cooperate with the Z-shaped condenser tube (1) to exhaust air, and a branch valve (7) connected to the exhaust pipeline (6) is provided at the end of the rear pipe (103) of the condenser tube; A water level monitoring device (8) is arranged on the water collecting pipe (2) and is used to monitor whether the liquid level in the water collecting pipe (2) rises to the three-way connection; A thermometer and hygrometer A (9) and a thermometer and hygrometer B (10), wherein the thermometer and hygrometer A (9) is arranged on the front tube (101) of the condenser and is used to monitor the temperature and humidity of the landfill gas in the front tube (101) of the condenser; and the thermometer and hygrometer B (10) is arranged on the rear tube (103) of the condenser and is used to monitor the temperature and humidity of the landfill gas in the rear tube (103) of the condenser; The central control system (11) is respectively connected to the branch valve (7), the drain valve (3), the exhaust fan (5), the thermometer and hygrometer A (9), the thermometer and hygrometer B (10) and the water level monitoring device (8), and controls the valve of the branch valve (7), the action of the exhaust fan (5) and the switch of the drain valve (3) by receiving the water level signal of the water level monitoring device (8).

2. The intelligent system for separating condensate from a landfill well according to claim 1, characterized in that: The front end of the condenser front tube (101) is connected to the pumping well pipe, and the condenser front tube (101) is arranged upward along the moving direction of the landfill gas to avoid water accumulation in depressions; the high-temperature and high-humidity landfill gas in the pumping well pipe is transmitted upward along the condenser front tube (101), and the water vapor is continuously condensed and flows downward back into the pumping well pipe.

3. The intelligent system for separating condensate from a landfill well according to claim 2, characterized in that: The rear tube (103) of the condenser is arranged upward along the moving direction of the landfill gas to avoid water accumulation in depressions. The rear tube (103) of the condenser further condenses the landfill gas that is not fully condensed in the front tube (101) of the condenser. The condensed landfill gas forms condensed water that flows downward into the water collecting pipe (2).

4. The intelligent system for separating condensate from a landfill well according to claim 1, characterized in that: The condenser front tube (101) is in a straight line, a broken line or a spiral shape, pointing upward and having no low concave point in the middle.

5. The intelligent system for separating condensate from a landfill well according to claim 4, characterized in that: The condenser front tube (101) is made of plastic material or stainless steel material.

6. The intelligent system for separating condensate from a landfill well according to claim 1, characterized in that: One end of the drainage pipe (4) away from the drainage valve (3) is connected to the air extraction well pipe, the leachate drainage pipe or the leachate reinjection well.

7. The intelligent system for separating condensate from a landfill well according to claim 1, characterized in that: The water level monitoring device (8) is a water level gauge or a water level perspective window arranged in the water collecting pipe (2).

8. A method for separating condensate from a landfill well, characterized in that: The method is applied to an intelligent system for separating condensate from a landfill well as claimed in any one of claims 1 to 7, and the method comprises: The central control system (11) receives a signal indicating that the liquid level in the water collecting pipe (2) has risen to the three-way connection, and automatically closes or reduces the valve of the branch pipe valve (7), or automatically closes or reduces the power of the exhaust fan (5), and then automatically opens the drain valve (3). After the central control system (11) reports that the condensed water in the water collecting pipe (2) has been drained, it automatically closes the drain valve (3), opens or increases the valve of the branch pipe valve (7), or opens or increases the power of the exhaust fan (5); Before the liquid level in the water collecting pipe (2) rises to the three-way connection, if the humidity of the front tube (101) of the condenser tube does not reach or is close to the saturated humidity corresponding to the temperature of the front tube (101) of the condenser tube, and the humidity of the gas in the rear tube (103) of the condenser tube does not reach or is close to the saturated humidity corresponding to the temperature of the rear tube (103) of the condenser tube, the central control system (11) receives the signal and automatically increases the valve of the branch valve (7), or increases the power of the exhaust fan (5), thereby increasing the exhaust wind speed of the exhaust pipeline (6) and accelerating the exhaust rate; On the contrary, before the liquid level in the water collecting pipe (2) rises to the three-way connection, if the humidity of the front tube (101) of the condenser reaches or approaches the saturated humidity corresponding to the temperature of the front tube (101) of the condenser, or the humidity of the gas in the rear tube (103) of the condenser reaches or approaches the saturated humidity corresponding to the temperature of the rear tube (103) of the condenser, the central control system (11) receives the signal and automatically adjusts the valve of the branch valve (7) or adjusts the power of the exhaust fan (5) to reduce the exhaust wind speed, so that the water vapor in the landfill gas can be fully condensed and separated in the front tube (101) of the condenser and the rear tube (103) of the condenser.

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