A combined leachate and landfill gas collection device for landfills

Abstract

The present invention discloses a combined leachate and landfill gas collection device for a landfill, including a combined collection structure. The combined collection structure includes a waste landfill layer, and a collection shaft is provided on the top surface of the waste landfill layer; through an instantaneous heating structure, the magnesium hydroxide solution can be instantaneously heated to release the carbon dioxide adsorbed and fixed in the magnesium hydroxide solution. Through a cooling mechanism, the magnesium hydroxide solution inside the cooling structure and the sealed cylinder can be cooled. Through a stirring mechanism, the magnesium hydroxide solution inside the sealed cylinder can be stirred, which helps to increase the cooling speed. Through the cooling structure, the carbon dioxide gas flow can be cooled to liquefy the steam in the carbon dioxide and reflux it into the magnesium hydroxide solution, so as to maintain the concentration of the magnesium hydroxide solution, ensure that the magnesium hydroxide solution has a good adsorption and fixation effect on carbon dioxide, and improve the practicability of the combined leachate and landfill gas collection device for the landfill.

Description

Technical Field

[0001] The present invention relates to the field of garbage treatment equipment, and more specifically, to a combined leachate and landfill gas collection device for landfills. Background Art

[0002] Garbage treatment methods generally can be divided into several methods such as sanitary landfill, incineration, composting, etc. A landfill is a site where garbage is centrally stacked under the sanitary landfill method. Sanitary landfills are widely used in China because of their low cost and good sanitation. Leachate and landfill gas will be generated in landfills. Landfill gas is a mixed gas mainly composed of methane and carbon dioxide produced after domestic garbage is landfilled and decomposed by microorganisms in the landfill. Depending on the source and composition of the landfilled garbage, the landfill gas contains methane with a volume ratio of 30% - 55% and carbon dioxide with a volume ratio of 30% - 45%. Methane in the landfill gas is a flammable and explosive gas that can be recycled.

[0003] Existing combined leachate and landfill gas collection devices for landfills mainly consist of vertical shafts, leachate extraction pumps, landfill gas extraction pumps, pipelines, etc. Among them, the landfill gas extraction pump directly extracts the landfill gas in the vertical shaft and transports it to the collection tank for storage. However, the landfill gas contains a relatively large amount of carbon dioxide gas, and the carbon dioxide gas will occupy a relatively large amount of space inside the collection tank, resulting in less methane stored in the collection tank and low recovery efficiency of methane. Therefore, there is an urgent need to design a combined leachate and landfill gas collection device for landfills. Summary of the Invention

[0004] 1. Technical Problems to be Solved

[0005] Aiming at the problem existing in the prior art that existing combined leachate and landfill gas collection devices for landfills mainly consist of vertical shafts, leachate extraction pumps, landfill gas extraction pumps, pipelines, etc. Among them, the landfill gas extraction pump directly extracts the landfill gas in the vertical shaft and transports it to the collection tank for storage. However, the landfill gas contains a relatively large amount of carbon dioxide gas, and the carbon dioxide gas will occupy a relatively large amount of space inside the collection tank, resulting in less methane stored in the collection tank and low recovery efficiency of methane. The purpose of the present invention is to provide a combined leachate and landfill gas collection device for landfills, which can well solve the problems raised in the background art.

[0006] 2. Technical Solutions

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A combined leachate and landfill gas collection device for a landfill, comprising a combined collection structure. The combined collection structure includes a waste landfill layer, a collection shaft is opened on the top surface of the waste landfill layer, a coarse stone isolation layer is fixedly connected to the inner wall of the collection shaft, a fine sand isolation layer is fixedly connected to the inner wall of the coarse stone isolation layer, a collection cylinder is fixedly connected to the inner wall of the fine sand isolation layer, a liquid inlet hole is opened at the bottom of the collection cylinder, a detection liquid level gauge is fixedly connected to the left side surface of the inner cavity of the collection cylinder, an air inlet hole is opened at the top of the collection cylinder, a plug is fixedly inserted into the top of the collection cylinder, a drain pipe is arranged on the plug, the bottom end of the drain pipe extends to the bottom of the inner cavity of the collection cylinder, a drain pump is arranged on the pipeline of the drain pipe, a coarse stone covering layer is laid on the top surface of the waste landfill layer, a sealing covering layer is laid on the top surface of the coarse stone covering layer, and the collection cylinder is fixedly inserted into the coarse stone covering layer and the sealing covering layer.

[0009] Preferably, it further includes an energy charging structure. The energy charging structure includes an isolation vertical pipe and a storage battery. The isolation vertical pipe is fixedly connected to the top surface of the sealing covering layer, the top end of the drain pipe bends to the right and is fixedly inserted into the right side surface of the isolation vertical pipe, the storage battery is located inside the isolation vertical pipe and is fixedly connected to the top surface of the sealing covering layer, an intelligent controller is fixedly connected to the right side surface of the inner cavity of the isolation vertical pipe, the top end of the isolation vertical pipe is fixedly connected to a bearing plate, a solar panel is fixedly connected to the top surface of the bearing plate, the solar panel is electrically connected to the storage battery, the storage battery is electrically connected to the intelligent controller, and the intelligent controller is electrically connected to the detection liquid level gauge and the drain pump.

[0010] Preferably, it further includes a gas distribution structure. The gas distribution structure includes a gas distribution flat pipe. The gas distribution flat pipe is fixedly connected to the inner wall of the collection cylinder and is located between the liquid inlet hole and the air inlet hole. A one-way gas vent valve is opened on the top surface of the gas distribution flat pipe, a gas distribution fan is fixedly installed at the left end of the top surface of the gas distribution flat pipe, a gas distribution air pipe is fixedly communicated with the gas distribution fan, the other end of the gas distribution air pipe is fixedly inserted into the top surface of the gas distribution flat pipe and is fixedly communicated with its inner cavity, a gas distribution one-way valve is fixedly communicated with the pipeline of the gas distribution air pipe, the drain pipe penetrates through the gas distribution flat pipe, and the gas distribution fan is electrically connected to the intelligent controller.

[0011] Preferably, it further includes a gas purification structure. The gas purification structure includes an absorption housing fixedly connected to the top surface of the air distribution flat tube. The absorption housing is communicated with the one-way air vent valve. The absorption housing is fixedly inserted into the inside of the plugging block. The top end of the absorption housing extends into the inside of the isolation vertical tube. A guiding inclined block located at its right end is fixedly connected to the bottom surface of the inner cavity of the absorption housing. A right inclined plate is fixedly connected to the right side surface of the inner cavity of the absorption housing. A left inclined plate is fixedly connected to the left side surface of the inner cavity of the absorption housing. The right inclined plate and the left inclined plate are stacked up and down and distributed alternately. A shielding net is fixedly connected to the top surface of the guiding inclined block. The top end of the shielding net is fixedly connected to the bottom surface of a right inclined plate. The inside of the absorption housing is filled with magnesium hydroxide solution. A demisting layer is fixedly connected to the inner wall of the absorption housing at its top. An air delivery pipe is fixedly inserted into the top surface of the absorption housing. The top end of the air delivery pipe bends to the right and is fixedly inserted into the right side surface of the isolation vertical tube. A pressure sensor located inside the collection cylinder is fixedly installed on the left side surface of the absorption housing. The pressure sensor is electrically connected to the intelligent controller.

[0012] Preferably, it further includes a liquid distribution structure. The liquid distribution structure includes a liquid distribution plate fixedly connected to the right side surface of the absorption housing and located inside the isolation vertical tube. A liquid distribution pump is fixedly installed on the top surface of the liquid distribution plate. The liquid distribution pump is electrically connected to the intelligent controller. A liquid distribution outlet pipe is fixedly communicated with the top of the liquid distribution pump. The other end of the liquid distribution outlet pipe is fixedly communicated with a liquid distribution duckbill. A liquid distribution inlet pipe is fixedly communicated with the front surface of the liquid distribution pump. The other end of the liquid distribution inlet pipe is fixedly inserted into the right side surface of the absorption housing and corresponds to the shielding net.

[0013] Preferably, it further includes a release structure. The release structure includes a sealed cylinder. The inside of the sealed cylinder is filled with magnesium hydroxide solution. The sealed cylinder is located inside the isolation vertical tube. The liquid distribution duckbill is fixedly inserted into the left side surface of the sealed cylinder. An inclined flat tube located at its bottom is fixedly communicated with the left side surface of the sealed cylinder. The left end of the inclined flat tube is fixedly communicated with the absorption housing. An electric gate valve is fixedly installed on the bottom surface of the inclined flat tube. The top end of the electric gate valve extends into the inside of the inclined flat tube. A fixed support leg is fixedly connected to the bottom surface of the sealed cylinder. The bottom end of the fixed support leg is fixedly connected to the top surface of the sealing cover layer. A lower liquid level gauge is fixedly connected to the left side surface of the inner cavity of the sealed cylinder. An upper liquid level gauge is fixedly installed on the left side surface of the inner cavity of the sealed cylinder above the lower liquid level gauge. The electric gate valve, the lower liquid level gauge, and the upper liquid level gauge are electrically connected to the intelligent controller.

[0014] Preferably, it further includes a cooling structure. The cooling structure includes a heat preservation box fixedly connected to the right side surface of the sealed cylinder. A spiral tube is fixedly connected to the left side surface of the inner cavity of the heat preservation box. Both ends of the spiral tube extend into the inside of the sealed cylinder. The bottom end of the spiral tube is immersed in the magnesium hydroxide solution inside the sealed cylinder. An exhaust branch pipe is fixedly communicated with the pipeline of the spiral tube. The other end of the exhaust branch pipe extends to the outside of the heat preservation box.

[0015] Preferably, it further includes an instantaneous heating structure. The instantaneous heating structure includes a diversion inclined plate, which is fixedly connected to the left side surface of the inner cavity of the closed cylinder, above the upper liquid level gauge and below the liquid distribution duckbill. A fixing strip is fixedly connected to the top surface of the diversion inclined plate, and a serpentine heating wire is fixedly inserted into the fixing strip. The serpentine heating wire is electrically connected to the intelligent controller.

[0016] Preferably, it further includes a cooling mechanism. The cooling mechanism includes a refrigerator, which is fixedly installed on the top surface of the sealed covering layer and below the closed cylinder. The refrigerator is electrically connected to the intelligent controller. A circulating liquid outlet pipe is fixedly communicated with the right side surface of the refrigerator. The top end of the circulating liquid outlet pipe extends into the interior of the heat preservation box and is movably inserted into the interior of the spiral pipe. A circulating liquid inlet pipe is fixedly communicated with the top of the refrigerator. The other end of the circulating liquid inlet pipe extends into the interior of the closed cylinder and is fixedly communicated with a spring-type heat exchange pipe. An installation strip is fixedly sleeved on the outside of the spring-type heat exchange pipe, and the installation strip is fixedly connected to the inner wall of the closed cylinder. The other end of the spring-type heat exchange pipe is fixedly communicated with a transfer pipe, and the other end of the transfer pipe extends into the interior of the heat preservation box.

[0017] Preferably, it further includes a stirring mechanism. The stirring mechanism includes a stirring motor, which is fixedly installed on the top surface of the closed cylinder. The stirring motor is electrically connected to the intelligent controller. The end of the output shaft of the stirring motor is fixedly connected with a stirring rod. The bottom end of the stirring rod extends into the interior of the closed cylinder, penetrates through the diversion inclined plate and is fixedly sleeved with a stirring blade. The stirring blade is immersed in the magnesium hydroxide solution inside the closed cylinder.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] The combined collection structure can collect leachate and landfill gas. The energy charging structure can convert solar energy into electrical energy to power the collection device. The gas distribution structure can extract landfill gas and inject it into the gas purification structure. The gas purification structure can absorb and fix carbon dioxide in the landfill gas, remove the carbon dioxide in the landfill gas, increase the proportion of methane in the collection tank, and improve the recovery efficiency of methane. The liquid distribution structure can inject the magnesium hydroxide solution inside the gas purification structure into the release structure. The instantaneous heating structure can instantaneously heat the magnesium hydroxide solution to release the carbon dioxide adsorbed and fixed in the magnesium hydroxide solution. The cooling mechanism can cool the magnesium hydroxide solution inside the cooling structure and the sealed cylinder. The stirring mechanism can agitate the magnesium hydroxide solution inside the sealed cylinder, which helps to increase the cooling rate. The cooling structure can cool the carbon dioxide gas stream to liquefy the steam in the carbon dioxide and return it to the magnesium hydroxide solution to maintain the concentration of the magnesium hydroxide solution, ensure that the magnesium hydroxide solution has a good adsorption and fixation effect on carbon dioxide, help to further increase the recovery efficiency of methane, and improve the practicability of the combined leachate and landfill gas collection device for landfills. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 is a schematic structural diagram of the gas distribution structure in the present invention;

[0023] Figure 3 For the present invention Figure 2 is a schematic internal structural diagram of the present invention;

[0024] Figure 4 For the present invention Figure 2 is a schematic structural diagram of the release structure in the present invention;

[0025] Figure 5 For the present invention Figure 4 is a schematic internal structural diagram of the present invention;

[0026] Figure 6 For the present invention Figure 5 is a top view of the instantaneous heating structure in the present invention;

[0027] Figure 7 For the present invention Figure 5 is a top view of the mounting strip in the present invention;

[0028] Figure 8 For the present invention Figure 5 is a schematic internal structural diagram of the cooling structure in the present invention.

[0029] Explanation of the reference numerals in the drawings:

[0030] 1. Combined collection structure; 101. Landfill layer; 102. Collection shaft; 103. Coarse stone isolation layer; 104. Fine sand isolation layer; 105. Collection cylinder; 106. Liquid inlet hole; 107. Detection liquid level gauge; 108. Air inlet hole; 109. Plug; 110. Drain pipe; 111. Drain pump; 112. Coarse stone covering layer; 113. Sealing covering layer; 2. Energy charging structure; 21. Isolation vertical pipe; 22. Battery; 23. Intelligent controller; 24. Bearing plate; 25. Solar panel; 3. Air distribution structure; 31. Air distribution flat pipe; 32. One-way air vent valve; 33. Air distribution fan; 34. Air distribution air duct; 35. Air distribution one-way valve; 4. Gas purification structure; 41. Absorption shell; 42. Guide inclined plane block; 43. Right inclined plate; 44. Left inclined plate; 45. Shielding net; 46. Magnesium hydroxide solution; 47. Demisting layer; 48. Gas transmission pipe; 49. Air pressure sensor; 5. Liquid distribution structure; 51. Liquid distribution plate; 52. Liquid distribution pump; 53. Liquid distribution outlet pipe; 54. Liquid distribution duckbill; 55. Liquid distribution inlet pipe; 6. Release structure; 61. Sealed cylinder; 62. Inclined flat pipe; 63. Electric gate valve; 64. Fixed support leg; 65. Lower liquid level gauge; 66. Upper liquid level gauge; 7. Cooling structure; 71. Insulation box; 72. Spiral pipe; 73. Exhaust branch pipe; 8. Instantaneous heating structure; 81. Guide inclined plate; 82. Fixed strip; 83. Serpentine heating wire; 9. Cooling mechanism; 91. Refrigerator; 92. Circulating outlet liquid pipe; 93. Circulating inlet liquid pipe; 94. Installation strip; 95. Spring type heat exchange pipe; 96. Adapter pipe; 10. Stirring mechanism; 1001. Stirring motor; 1002. Stirring rod; 1003. Stirring blade. Specific embodiments

[0031] The following will combine the accompanying drawings in the embodiments of the present invention; clearly and completely describe the technical solutions 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. Based on the embodiments of the present invention; all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-8, A combined leachate and landfill gas collection device for landfills, including a combined collection structure 1. The combined collection structure 1 includes a landfill layer 101. A collection shaft 102 is opened on the top surface of the landfill layer 101. A coarse stone isolation layer 103 is fixedly connected to the inner wall of the collection shaft 102. A fine sand isolation layer 104 is fixedly connected to the inner wall of the coarse stone isolation layer 103. A collection cylinder 105 is fixedly connected to the inner wall of the fine sand isolation layer 104. A liquid inlet hole 106 is opened at the bottom of the collection cylinder 105. A detection liquid level gauge 107 is fixedly connected to the left side surface of the inner cavity of the collection cylinder 105. An air inlet hole 108 is opened at the top of the collection cylinder 105. A sealing plug 109 is fixedly inserted at the top of the collection cylinder 105. A drain pipe 110 is provided on the sealing plug 109. The bottom end of the drain pipe 110 extends to the bottom of the inner cavity of the collection cylinder 105. A drain pump 111 is provided on the pipeline of the drain pipe 110. A coarse stone covering layer 112 is laid on the top surface of the landfill layer 101. A sealing covering layer 113 is laid on the top surface of the coarse stone covering layer 112. The collection cylinder 105 is fixedly inserted into the coarse stone covering layer 112 and the sealing covering layer 113.

[0033] It also includes an energy charging structure 2. The energy charging structure 2 includes an isolation vertical pipe 21 and a storage battery 22. The isolation vertical pipe 21 is fixedly connected to the top surface of the sealing covering layer 113. The top end of the drain pipe 110 bends to the right and is fixedly inserted into the right side surface of the isolation vertical pipe 21. The storage battery 22 is located inside the isolation vertical pipe 21 and is fixedly connected to the top surface of the sealing covering layer 113. An intelligent controller 23 is fixedly connected to the right side surface of the inner cavity of the isolation vertical pipe 21. The top end of the isolation vertical pipe 21 is fixedly connected to a bearing plate 24. A solar panel 25 is fixedly connected to the top surface of the bearing plate 24. The solar panel 25 is electrically connected to the storage battery 22. The storage battery 22 is electrically connected to the intelligent controller 23. The intelligent controller 23 is electrically connected to the detection liquid level gauge 107 and the drain pump 111.

[0034] It also includes a gas distribution structure 3. The gas distribution structure 3 includes a gas distribution flat pipe 31. The gas distribution flat pipe 31 is fixedly connected to the inner wall of the collection cylinder 105 and is located between the liquid inlet hole 106 and the air inlet hole 108. A one-way gas vent valve 32 is opened on the top surface of the gas distribution flat pipe 31. A gas distribution fan 33 is fixedly installed at the left end of the top surface of the gas distribution flat pipe 31. A gas distribution air pipe 34 is fixedly connected to the gas distribution fan 33. The other end of the gas distribution air pipe 34 is fixedly inserted into the top surface of the gas distribution flat pipe 31 and is fixedly communicated with its inner cavity. A gas distribution one-way valve 35 is fixedly connected to the pipeline of the gas distribution air pipe 34. The drain pipe 110 penetrates through the gas distribution flat pipe 31. The gas distribution fan 33 is electrically connected to the intelligent controller 23.

[0035] It further includes a gas purification structure 4. The gas purification structure 4 includes an absorption housing 41. The absorption housing 41 is fixedly connected to the top surface of the air distribution flat tube 31. The absorption housing 41 is communicated with the one-way air vent valve 32. The absorption housing 41 is fixedly inserted into the inside of the plug 109. The top end of the absorption housing 41 extends into the inside of the isolation vertical tube 21. On the bottom surface of the inner cavity of the absorption housing 41, a guiding inclined plane block 42 located at its right end is fixedly connected. On the right side surface of the inner cavity of the absorption housing 41, a right inclined plate 43 is fixedly connected. On the left side surface of the inner cavity of the absorption housing 41, a left inclined plate 44 is fixedly connected. The right inclined plate 43 and the left inclined plate 44 are stacked up and down and distributed alternately. On the top surface of the guiding inclined plane block 42, a shielding net 45 is fixedly connected. The top end of the shielding net 45 is fixedly connected to the bottom surface of a right inclined plate 43. The inside of the absorption housing 41 is filled with magnesium hydroxide solution 46. The magnesium hydroxide solution 46 reacts with carbon dioxide to generate magnesium bicarbonate, and the magnesium bicarbonate decomposes when heated to generate magnesium hydroxide. On the inner wall of the absorption housing 41, a demisting layer 47 located at its top is fixedly connected. On the top surface of the absorption housing 41, an air delivery pipe 48 is fixedly inserted. The top end of the air delivery pipe 48 bends to the right and is fixedly inserted into the right side surface of the isolation vertical tube 21. On the left side surface of the absorption housing 41, a pressure sensor 49 located inside the collection cylinder 105 is fixedly installed. The pressure sensor 49 is electrically connected to the intelligent controller 23.

[0036] It further includes a liquid distribution structure 5. The liquid distribution structure 5 includes a liquid distribution plate 51. The liquid distribution plate 51 is fixedly connected to the right side surface of the absorption housing 41 and is located inside the isolation vertical tube 21. On the top surface of the liquid distribution plate 51, a liquid distribution pump 52 is fixedly installed. The liquid distribution pump 52 is electrically connected to the intelligent controller 23. The top of the liquid distribution pump 52 is fixedly communicated with a liquid distribution outlet pipe 53. The other end of the liquid distribution outlet pipe 53 is fixedly communicated with a liquid distribution duckbill 54. On the front surface of the liquid distribution pump 52, a liquid distribution inlet pipe 55 is fixedly communicated. The other end of the liquid distribution inlet pipe 55 is fixedly inserted into the right side surface of the absorption housing 41 and corresponds to the shielding net 45.

[0037] It also includes a release structure 6. The release structure 6 includes a sealed cylinder 61. The interior of the sealed cylinder 61 is filled with a magnesium hydroxide solution 46. The sealed cylinder 61 is located inside the isolation vertical pipe 21. The liquid distribution duckbill 54 is fixedly inserted on the left side surface of the sealed cylinder 61. On the left side surface of the sealed cylinder 61, there is a slanting flat pipe 62 fixedly connected at its bottom. The left end of the slanting flat pipe 62 is fixedly connected to the absorption housing 41. On the bottom surface of the slanting flat pipe 62, an electric gate valve 63 is fixedly installed. The top end of the electric gate valve 63 extends into the interior of the slanting flat pipe 62. On the bottom surface of the sealed cylinder 61, there is a fixed support leg 64 fixedly connected. The bottom end of the fixed support leg 64 is fixedly connected to the top surface of the sealing cover layer 113. On the left side surface of the inner cavity of the sealed cylinder 61, there is a lower liquid level gauge 65 fixedly connected. On the left side surface of the inner cavity of the sealed cylinder 61, there is an upper liquid level gauge 66 fixedly installed above the lower liquid level gauge 65. The electric gate valve 63, the lower liquid level gauge 65, and the upper liquid level gauge 66 are electrically connected to the intelligent controller 23.

[0038] It also includes a cooling structure 7. The cooling structure 7 includes a heat preservation box 71. The heat preservation box 71 is fixedly connected to the right side surface of the sealed cylinder 61. On the left side surface of the inner cavity of the heat preservation box 71, there is a spiral pipe 72 fixedly connected. Both ends of the spiral pipe 72 extend into the interior of the sealed cylinder 61. The bottom end of the spiral pipe 72 is immersed in the magnesium hydroxide solution 46 inside the sealed cylinder 61. On the pipeline of the spiral pipe 72, there is an exhaust branch pipe 73 fixedly connected. The other end of the exhaust branch pipe 73 extends outside the heat preservation box 71.

[0039] It also includes an instantaneous heating structure 8. The instantaneous heating structure 8 includes a diversion inclined plate 81. The diversion inclined plate 81 is fixedly connected to the left side surface of the inner cavity of the sealed cylinder 61, above the upper liquid level gauge 66 and below the liquid distribution duckbill 54. On the top surface of the diversion inclined plate 81, there is a fixed strip 82 fixedly connected. A serpentine heating wire 83 is fixedly inserted on the fixed strip 82. The serpentine heating wire 83 is electrically connected to the intelligent controller 23.

[0040] It also includes a temperature reduction mechanism 9. The temperature reduction mechanism 9 includes a refrigerator 91. The refrigerator 91 is fixedly installed on the top surface of the sealing cover layer 113 and below the sealed cylinder 61. The refrigerator 91 is electrically connected to the intelligent controller 23. On the right side surface of the refrigerator 91, there is a circulating liquid outlet pipe 92 fixedly connected. The top end of the circulating liquid outlet pipe 92 extends into the interior of the heat preservation box 71 and is movably inserted into the interior of the spiral pipe 72. On the top of the refrigerator 91, there is a circulating liquid inlet pipe 93 fixedly connected. The other end of the circulating liquid inlet pipe 93 extends into the interior of the sealed cylinder 61 and is fixedly connected to a spring - type heat exchange pipe 95. An installation strip 94 is fixedly sleeved outside the spring - type heat exchange pipe 95. The installation strip 94 is fixedly connected to the inner wall of the sealed cylinder 61. The other end of the spring - type heat exchange pipe 95 is fixedly connected to a transfer pipe 96. The other end of the transfer pipe 96 extends into the interior of the heat preservation box 71.

[0041] It further includes a stirring mechanism 10. The stirring mechanism 10 includes a stirring motor 1001 which is fixedly installed on the top surface of the closed cylinder 61. The stirring motor 1001 is electrically connected to the intelligent controller 23. The end of the output shaft of the stirring motor 1001 is fixedly connected with a stirring rod 1002. The bottom end of the stirring rod 1002 extends into the interior of the closed cylinder 61, penetrates through the diversion inclined plate 81, and is fixedly sleeved with a stirring blade 1003. The stirring blade 1003 is immersed in the magnesium hydroxide solution 46 inside the closed cylinder 61.

[0042] Working principle:

[0043] First, the leachate generated inside the landfill layer 101 passes through the internal gaps of the coarse stone isolation layer 103, the internal gaps of the fine sand isolation layer 104, and the liquid inlet hole 106 and enters the collection cylinder 105. Then, the liquid level inside the collection cylinder 105 gradually rises. Next, the liquid level gauge 107 monitors the liquid level height in real time. After that, when the liquid level height reaches the preset maximum value inside the intelligent controller 23, the liquid level gauge 107 sends a signal to the intelligent controller 23. Then, the intelligent controller 23 controls the drain pump 111 to work. Next, the drain pump 111 drives the leachate to be discharged through the drain pipe 110. After that, the liquid level height gradually decreases. Then, when the liquid level height reaches the preset minimum value inside the intelligent controller 23, the intelligent controller 23 controls the drain pump 111 to close. Thus, the automatic discharge of the leachate is realized. Next, the intelligent controller 23 controls the air distribution blower 33 to operate. After that, the air distribution blower 33 extracts the landfill gas inside the collection cylinder 105 and injects the landfill gas into the air distribution flat pipe 31 through the air distribution air duct 34 and the air distribution one-way valve 35. Then, the air pressure inside the collection cylinder 105 decreases. Next, the air pressure sensor 49 monitors the air pressure value in real time and sends it to the intelligent controller 23. When the air pressure value is greater than the preset value inside the intelligent controller 23, the intelligent controller 23 will control the air distribution blower 33 to operate. When the air pressure value is less than the preset value inside the intelligent controller 23, the intelligent controller 23 will control the air distribution blower 33 to stop operating in order to maintain a negative pressure state inside the collection cylinder 105. After that, the air distribution flat pipe 31 injects the landfill gas into the absorption housing 41 in the form of bubbles through the one-way gas vent valve 32. Then, the bubbles formed by the landfill gas rise inside the magnesium hydroxide solution 46. Next, the bubbles gather to form small air cavities below the connection between the right inclined plate 43 and the inner wall of the absorption housing 41 and below the connection between the left inclined plate 44 and the inner wall of the absorption housing 41, which helps to increase the retention time of the gas inside the magnesium hydroxide solution 46 and enhance the effect of carbon dioxide absorption. After that, the small air cavities gradually expand. Then, the gas inside the small air cavities overflows upward from the ends of the right inclined plate 43 and the left inclined plate 44 and gathers to form new small air cavities below the connection between the right inclined plate 43 and the inner wall of the absorption housing 41 and below the connection between the left inclined plate 44 and the inner wall of the absorption housing 41 in the upper layer. Repeat the above process to make the landfill gas move upward inside the magnesium hydroxide solution 46. Next, the magnesium hydroxide solution 46 absorbs and fixes the carbon dioxide in the landfill gas during the upward movement of the landfill gas in order to remove the carbon dioxide. After that, the landfill gas from which the carbon dioxide has been removed overflows from the top surface of the magnesium hydroxide solution 46, is demisted by the demisting layer 47, and is discharged into the collection box through the gas transmission pipe 48. Then, the intelligent controller 23 controls the serpentine heating wire 83 to operate. Next, the surface temperature of the serpentine heating wire 83 increases. After that, the intelligent controller 23 controls the liquid distribution pump 52 to operate. Then, the magnesium hydroxide solution 46 inside the absorption housing 41 is sprayed onto the surface of the serpentine heating wire 83 under the drive of the liquid distribution pump 52 through the liquid distribution inlet pipe 55, the liquid distribution pump 52, the liquid distribution outlet pipe 53, and the liquid distribution nozzle 54. Next, the serpentine heating wire 83 instantaneously heats the magnesium hydroxide solution 46 on its surface.Afterwards, the carbon dioxide absorbed in the magnesium hydroxide solution 46 is released by heating. Then, the intelligent controller 23 controls the operation of the refrigerator 91. Next, the coolant inside the refrigerator 91 circulates inside the circulating outlet pipe 92, the insulation box 71, the adapter pipe 96, the spring-type heat exchange pipe 95, and the circulating inlet pipe 93 to cool down the magnesium hydroxide solution 46 inside the sealed cylinder 61 and the carbon dioxide gas flow inside the spiral pipe 72. After that, the steam in the carbon dioxide gas flow liquefies and flows back to the inside of the sealed cylinder 61 along the bottom surface of the inner cavity of the spiral pipe 72, and the carbon dioxide is discharged through the exhaust branch pipe 73. Then, the magnesium hydroxide solution 46 spills from the diversion inclined plate 81. Next, the magnesium hydroxide solution 46 inside the sealed cylinder 61 gradually increases. After that, the intelligent controller 23 controls the operation of the stirring motor 1001. Then, the stirring motor 1001 drives the stirring blade 1003 to rotate through the stirring rod 1002 to stir the magnesium hydroxide solution 46 inside the sealed cylinder 61 to accelerate cooling. Next, the magnesium hydroxide solution 46 submerges the lower liquid level gauge 65. After that, the magnesium hydroxide solution 46 submerges the upper liquid level gauge 66. Then, the upper liquid level gauge 66 controls the opening of the electric gate valve 63 through the intelligent controller 23. Next, the magnesium hydroxide solution 46 inside the sealed cylinder 61 flows back to the inside of the absorption housing 41 through the inclined flat pipe 62. After that, the liquid level of the magnesium hydroxide solution 46 inside the sealed cylinder 61 drops. Then, the lower liquid level gauge 65 emerges from the magnesium hydroxide solution 46. Next, the lower liquid level gauge 65 controls the closing of the electric gate valve 63 through the intelligent controller 23. After that, the flow of the magnesium hydroxide solution 46 inside the sealed cylinder 61 into the inside of the absorption housing 41 stops, and that's it.,

[0044] The above; is only the preferred specific implementation manner of the present invention; however, the protection scope of the present invention is not limited thereto; any person skilled in the art within the technical scope disclosed by the present invention; according to the technical solution of the present invention and its improved conceptions, making equivalent replacements or changes; should be covered within the protection scope of the present invention.,

Claims

1. A combined leachate and landfill gas collection device for landfills, comprising a combined collection structure (1), characterized in that: The combined collection structure (1) includes a landfill layer (101). A collection shaft (102) is provided on the top surface of the landfill layer (101). A coarse stone isolation layer (103) is fixedly connected to the inner wall of the collection shaft (102). A fine sand isolation layer (104) is fixedly connected to the inner wall of the coarse stone isolation layer (103). A collection cylinder (105) is fixedly connected to the inner wall of the fine sand isolation layer (104). A liquid inlet hole (106) is provided at the bottom of the collection cylinder (105). A detection liquid level gauge (107) is fixedly connected to the left side surface of the inner cavity of the collection cylinder (105). An air inlet hole (108) is provided at the top of the collection cylinder (105). A plugging block (109) is fixedly inserted at the top of the collection cylinder (105). A liquid discharge pipe (110) is provided on the plugging block (109). The bottom end of the liquid discharge pipe (110) extends to the bottom of the inner cavity of the collection cylinder (105). A liquid discharge pump (111) is provided on the pipeline of the liquid discharge pipe (110). A coarse stone covering layer (112) is laid on the top surface of the landfill layer (101). A sealing covering layer (113) is laid on the top surface of the coarse stone covering layer (112). The collection cylinder (105) is fixedly inserted into the coarse stone covering layer (112) and the sealing covering layer (113). It further includes an energy charging structure (2). The energy charging structure (2) includes an isolation vertical pipe (21) and a storage battery (22). The isolation vertical pipe (21) is fixedly connected to the top surface of the sealing covering layer (113). The top end of the liquid discharge pipe (110) bends to the right and is fixedly inserted into the right side surface of the isolation vertical pipe (21). The storage battery (22) is located inside the isolation vertical pipe (21) and is fixedly connected to the top surface of the sealing covering layer (113). An intelligent controller (23) is fixedly connected to the right side surface of the inner cavity of the isolation vertical pipe (21). The top end of the isolation vertical pipe (21) is fixedly connected to a bearing plate (24). A solar panel (25) is fixedly connected to the top surface of the bearing plate (24). It further includes an air distribution structure (3). The air distribution structure (3) includes an air distribution flat pipe (31). The air distribution flat pipe (31) is fixedly connected to the inner wall of the collection cylinder (105) and is located between the liquid inlet hole (106) and the air inlet hole (108). A one-way air vent valve (32) is provided on the top surface of the air distribution flat pipe (31). An air distribution fan (33) is fixedly installed at the left end of the top surface of the air distribution flat pipe (31). An air distribution air pipe (34) is fixedly connected to the air distribution fan (33). The other end of the air distribution air pipe (34) is fixedly inserted into the top surface of the air distribution flat pipe (31) and is fixedly communicated with its inner cavity. An air distribution one-way valve (35) is fixedly connected to the pipeline of the air distribution air pipe (34). The liquid discharge pipe (110) penetrates through the air distribution flat pipe (31). It further includes a gas purification structure (4), and the gas purification structure (4) includes an absorption housing (41). The absorption housing (41) is fixedly connected to the top surface of the air distribution flat tube (31). The absorption housing (41) is communicated with the one-way air vent valve (32). The absorption housing (41) is fixedly inserted into the inside of the plug (109). The top end of the absorption housing (41) extends into the inside of the isolation vertical tube (21). A guiding inclined surface block (42) located at its right end is fixedly connected to the bottom surface of the inner cavity of the absorption housing (41). A right inclined plate (43) is fixedly connected to the right side surface of the inner cavity of the absorption housing (41). A left inclined plate (44) is fixedly connected to the left side surface of the inner cavity of the absorption housing (41). The right inclined plate (43) and the left inclined plate (44) are stacked up and down and distributed alternately. A shielding net (45) is fixedly connected to the top surface of the guiding inclined surface block (42). The top end of the shielding net (45) is fixedly connected to the bottom surface of a right inclined plate (43). Magnesium hydroxide solution (46) is filled in the absorption housing (41). A demisting layer (47) located at its top is fixedly connected to the inner wall of the absorption housing (41). An air delivery pipe (48) is fixedly inserted into the top surface of the absorption housing (41). The top end of the air delivery pipe (48) bends to the right and is fixedly inserted into the right side surface of the isolation vertical tube (21). A pressure sensor (49) located inside the collection cylinder (105) is fixedly installed on the left side surface of the absorption housing (41).

2. The combined leachate and landfill gas collection device for a landfill according to claim 1, characterized in that: It further includes a liquid distribution structure (5), and the liquid distribution structure (5) includes a liquid distribution plate (51). The liquid distribution plate (51) is fixedly connected to the right side surface of the absorption housing (41) and is located inside the isolation vertical tube (21). A liquid distribution pump (52) is fixedly installed on the top surface of the liquid distribution plate (51). The top of the liquid distribution pump (52) is fixedly communicated with a liquid distribution outlet pipe (53). The other end of the liquid distribution outlet pipe (53) is fixedly communicated with a liquid distribution duckbill (54). A liquid distribution inlet pipe (55) is fixedly communicated with the front surface of the liquid distribution pump (52). The other end of the liquid distribution inlet pipe (55) is fixedly inserted into the right side surface of the absorption housing (41) and corresponds to the shielding net (45).

3. The combined leachate and landfill gas collection device for a landfill according to claim 2, characterized in that: It further includes a release structure (6), and the release structure (6) includes a sealed cylinder (61). A cooling structure (7), a heating structure (8), a temperature reduction mechanism (9), and a stirring mechanism (10) are provided on the sealed cylinder (61). The sealed cylinder (61) is located inside the isolation vertical pipe (21). The liquid distribution duckbill (54) is fixedly inserted on the left side surface of the sealed cylinder (61). An inclined flat pipe (62) located at its bottom is fixedly communicated on the left side surface of the sealed cylinder (61). The left end of the inclined flat pipe (62) is fixedly communicated with the absorption housing (41). An electric gate valve (63) is fixedly installed on the bottom surface of the inclined flat pipe (62). The top end of the electric gate valve (63) extends into the inclined flat pipe (62). A fixed support leg (64) is fixedly connected to the bottom surface of the sealed cylinder (61). The bottom end of the fixed support leg (64) is fixedly connected to the top surface of the sealing cover layer (113). A lower liquid level gauge (65) is fixedly connected to the left side surface of the inner cavity of the sealed cylinder (61). An upper liquid level gauge (66) is fixedly installed on the left side surface of the inner cavity of the sealed cylinder (61) and is located above the lower liquid level gauge (65).

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