Pneumatic membrane polluted soil treatment system

Abstract

The invention provides a pneumatic membrane polluted soil treatment system, which comprises an air membrane structure, which forms an air membrane space for stacking a polluted mound together with the ground; the air outlet ends of the air inlet pipelines extend in the direction away from the ground and are in contact with the polluted mounds; the thermal desorption device is used for generating hot gas and conveying the hot gas to the polluted mound through a gas inlet pipeline, so that the polluted mound is heated to generate volatile gas; the gas inlet ends of the exhaust pipelines are communicated with the gas film space, the gas outlet ends of the exhaust pipelines are communicated with the outside, and the exhaust pipelines are used for exhausting volatile gas generated by the polluted mounds out of the gas film space; the treatment and discharge system is used for treating the discharged gas; through cooperation of the thermal desorption device, the gas inlet pipeline, the gas exhaust pipeline and other equipment, the polluted soil treatment efficiency and treatment effect are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of contaminated soil remediation, and in particular relates to an aerated membrane contaminated soil treatment system. Background Art

[0002] In the process of rapid industrialization and urbanization, soil pollution has become increasingly prominent and has become a major obstacle to sustainable development. Contaminated soil refers to land where harmful substances are directly or indirectly introduced by human activities, resulting in damage to the original functions of the soil and deterioration of environmental quality. The sources of pollution are extensive, including but not limited to industrial wastewater discharge, excessive use of pesticides and fertilizers, oil spills, and solid waste landfills. These pollutants not only destroy the ecological balance of the soil, but may also accumulate through the food chain, ultimately threatening human health and ecological security.

[0003] In the existing system for treating contaminated soil, a portion of the contaminated soil is not in a completely closed environment, so that the toxic and harmful gases in the contaminated soil are directly discharged into the atmosphere, causing environmental pollution and endangering human health; another portion of the contaminated soil is in a completely closed environment during treatment, but its treatment environment is small, the treatment rate is low, and the treatment effect is poor. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention proposes an aerated membrane contaminated soil treatment system.

[0005] This is achieved specifically through the following technical solutions:

[0006] An aerated membrane contaminated soil treatment system, comprising:

[0007] An air membrane structure, wherein the air membrane structure and the ground together form an air membrane space for stacking contaminated soil;

[0008] A thermal desorption device and at least one air inlet pipeline, wherein the outlet ends of the multiple air inlet pipelines extend in a direction away from the ground and contact the contaminated soil pile; the outlet ends of the air inlet pipelines are connected to the air film space, and the inlet ends of the air inlet pipelines are connected to the thermal desorption device; the thermal desorption device is used to generate hot air and transport it to the contaminated soil pile through the air inlet pipeline, so that the contaminated soil pile is heated to generate volatile gas;

[0009] At least one exhaust pipeline, the air inlet end of the exhaust pipeline is connected to the air film space and close to the contaminated soil pile, and the air outlet end of the exhaust pipeline is connected to the outside world, and is used to discharge the volatile gas generated by the contaminated soil pile out of the air film space;

[0010] The treatment and exhaust system is used to connect to and treat the volatile gas exhausted from the exhaust pipeline so as to discharge the treated gas.

[0011] In a specific embodiment, at least one of the exhaust lines includes at least one first exhaust line and / or at least one second exhaust line.

[0012] The air inlet end of the first exhaust pipeline extends in a direction away from the ground and contacts the contaminated soil pile, and the air outlet end of the first exhaust pipeline is connected to the outside world, so as to discharge the volatile gas in the contaminated soil pile out of the air film space;

[0013] The air membrane structure has a lower structure for connecting to the ground, the air inlet end of the second exhaust pipeline is connected to the lower structure to the air membrane space, and the air outlet end of the second exhaust pipeline is connected to the outside world to discharge volatile gases outside the contaminated soil pile into the air membrane space.

[0014] In a specific embodiment, the outlet end of the air inlet pipeline has a plurality of first air holes, the plurality of first air holes are arranged along the extension direction of the outlet end of the air inlet pipeline, and each of the first air holes is inclined toward the ground;

[0015] The air inlet end of the first exhaust pipeline has a plurality of second air holes, the plurality of second air holes are arranged along the extension direction of the air inlet end of the first exhaust pipeline, and each of the second air holes is inclined toward the ground.

[0016] In a specific embodiment, it also includes a first monitoring device, a second monitoring device, a control device and an emission chimney, wherein the first monitoring device is used to monitor the concentration of the volatile gas inside the air membrane space, and the control device is used to open the treatment and emission system for treatment when the concentration of the volatile gas inside the air membrane space exceeds a first preset value;

[0017] The emission chimney is connected to the first exhaust pipeline and / or the second exhaust pipeline, and the second monitoring device is arranged at the emission chimney to monitor the dust and toxic and harmful gas concentrations in the emission chimney; the emission chimney is provided with an exhaust valve, and the control device is also used to close the exhaust valve when the dust and toxic and harmful gas concentrations in the emission chimney exceed a second preset value.

[0018] In a specific embodiment, it also includes an exhaust device, which is connected to the treatment and exhaust system and is used to generate negative pressure to extract volatile gases generated by the contaminated soil pile from the air membrane space to the treatment and exhaust system for treatment;

[0019] The treatment and emission system comprises at least one dust filtering device and at least one gas processing device, wherein the dust filtering device is arranged on the air film structure, and the air inlet end of the second exhaust pipeline is connected with the air film space through the dust filtering device, so as to connect with the volatile gas filtered by the dust filtering device;

[0020] The gas processing device is connected to the gas outlet end of the first exhaust pipeline and the gas outlet end of the second exhaust pipeline, and is used to connect the volatile gas transported by the first exhaust pipeline and the second exhaust pipeline, and adsorb toxic and harmful substances in the volatile gas;

[0021] The exhaust chimney is connected to the gas processing device or the air extraction device, and is used to discharge the gas filtered by the gas processing device.

[0022] In a specific embodiment, the air film structure further includes a film body arranged on the lower structure, and the lower structure, the film body and the ground together constitute an air film space; at least one of the dust filtering devices includes a plurality of the dust filtering devices, and the plurality of the dust filtering devices are arranged at intervals along the length direction of the lower structure and / or the width direction of the lower structure;

[0023] Wherein, each of the dust filtering devices is correspondingly configured with one of the second exhaust pipelines and one of the gas processing devices;

[0024] Or each of the dust filtering devices is correspondingly provided with a second exhaust pipeline, and the gas outlet ends of at least two of the second exhaust pipelines are connected to the same activated carbon adsorption box;

[0025] Or at least two of the dust filtering devices are jointly configured with one second exhaust pipeline and one gas processing device.

[0026] In a specific embodiment, at least one anemometer is provided on the top of the air membrane structure, and at least one pressure sensor is provided inside the air membrane structure. The control device is electrically connected to the anemometer and the pressure sensor, and is used to determine the pressure adjustment value of the air membrane space according to the wind speed outside the air membrane detected by the anemometer and the pressure inside the air membrane detected by the pressure sensor;

[0027] The inflatable membrane contaminated soil treatment system also includes a first air supply device, and the control device is electrically connected to the first air supply device and is used to drive the first air supply device to supply air to the air membrane space according to the pressure adjustment value of the air membrane space.

[0028] In a specific embodiment, the outlet ends of multiple inlet pipes and the inlet ends of multiple first exhaust pipes are alternately arranged on the ground and arranged in an array; and at least a portion of the outlet ends of the inlet pipes and at least a portion of the inlet ends of the first exhaust pipes are provided with opening and closing valves.

[0029] In a specific embodiment, the exhaust treatment system further includes a gas drying device and a gas cooling device, wherein the gas drying device is used to connect to the volatile gas transported by the first exhaust pipeline and the second exhaust pipeline and dry the volatile gas;

[0030] The gas cooling device is connected to the gas drying device and is used for cooling the dried volatile gas.

[0031] In a specific embodiment, it also includes a vehicle passage and a belt conveyor, wherein one end of the vehicle passage is connected to the air film structure and the other end is connected to the outside world; one end of the belt conveyor is connected to the air film structure and the other end is connected to the outside world, and an airtight device is provided at the connection between the belt conveyor and the air film structure;

[0032] And / or, the thermal desorption device comprises a second air supply device and a temperature regulating device, and the second air supply device and the temperature regulating device are sequentially arranged along the air supply direction of the air inlet pipeline;

[0033] And / or, the inflatable membrane contaminated soil treatment system also includes a personnel passage, which connects the air membrane space with the outside world.

[0034] The present invention has at least the following beneficial effects:

[0035] The present application provides an inflatable membrane contaminated soil treatment system, comprising: an air membrane structure, the air membrane structure and the ground together constitute an air membrane space for stacking contaminated soil piles; a thermal desorption device and at least one air inlet pipeline, the outlet end of at least one air inlet pipeline extends in a direction away from the ground and contacts the contaminated soil pile; the outlet end of the air inlet pipeline is connected to the air membrane space, and the air inlet end of the air inlet pipeline is connected to the thermal desorption device; the thermal desorption device is used to generate hot gas and transport it to the contaminated soil pile through the air inlet pipeline, so that the contaminated soil pile is heated to generate volatile gas; multiple exhaust pipelines, the air inlet end of the exhaust pipeline is connected to the air membrane space and close to the contaminated soil pile, and the outlet end of the exhaust pipeline is connected to the outside world, which is used to discharge the volatile gas generated by the contaminated soil pile from the air membrane space; a treatment and emission system, which is used to connect and treat the volatile gas discharged from the exhaust pipeline, so as to discharge the treated gas. The present application uses the air membrane space defined by the air membrane structure and the ground to stack the contaminated soil pile, so as to provide a large enclosed space for treating the contaminated soil pile, which has certain economy and flexibility. In addition, by providing an air intake pipeline and a thermal desorption device, the air intake pipeline is in full contact with the contaminated soil pile, thereby accelerating the contaminated soil pile to be fully heated to produce volatile gases; the volatile gases produced by the contaminated soil pile are then output through multiple exhaust pipelines to facilitate the treatment of toxic and harmful substances in the volatile gases, thereby effectively improving the contaminated soil treatment efficiency.

[0036] Furthermore, at least one exhaust pipeline includes at least one first exhaust pipeline and at least one second exhaust pipeline, the air inlet ends of the multiple first exhaust pipelines extend in a direction away from the ground and contact the contaminated soil pile, the air outlet ends of the first exhaust pipelines are connected to the outside world, and are used to discharge the volatile gases in the contaminated soil pile out of the air membrane space; the air membrane structure has a lower structure for connecting to the ground, the air inlet end of the second exhaust pipeline is connected to the air membrane space with the lower structure, and the air outlet end of the second exhaust pipeline is connected to the outside world, and is used to discharge the volatile gases outside the contaminated soil pile out of the air membrane space. The present application adopts two arrangements of exhaust pipes, that is, the first exhaust pipeline is directly in contact with the contaminated soil pile, and the volatile gases in the contaminated soil pile can be discharged, and the second exhaust pipeline is arranged in the lower structure, and the volatile gases outside the contaminated soil pile can be discharged. Through the cooperation of the first exhaust pipeline and the second exhaust pipeline, the volatile gases in the air membrane space can be discharged more fully and quickly.

[0037] Furthermore, the outlet end of the air inlet pipeline has a plurality of first air holes, which are arranged along the extension direction of the outlet end of the air inlet pipeline, and each first air hole is inclined toward the ground; the air inlet end of the first exhaust pipeline has a plurality of second air holes, which are arranged along the extension direction of the air inlet end of the first exhaust pipeline, and each second air hole is inclined toward the ground. The present application increases the full contact between hot air and the contaminated soil pile by setting a plurality of first air holes, thereby allowing the contaminated soil pile to be fully heated to facilitate the generation of volatile gases; the volatile gases in the contaminated soil pile can be fully extracted by setting a plurality of second air holes, so as to facilitate the subsequent treatment of the volatile gases; further, by setting the first and second air holes at an angle, the air holes can be effectively prevented from being blocked by the soil pile, thereby improving the reliability of the equipment.

[0038] Furthermore, the present application provides an inflatable membrane contaminated soil treatment system, which also includes a first monitoring device, a second monitoring device and a control device. The first monitoring device is used to monitor the concentration of volatile gases inside the air membrane space. The control device is used to open the treatment and discharge system when the concentration of volatile gases inside the air membrane space exceeds a first preset value; the discharge chimney is connected to the first exhaust pipeline and the second exhaust pipeline, and the second monitoring device is arranged at the discharge chimney to monitor the dust and toxic and harmful gas concentration of the discharge chimney; the discharge chimney is provided with an exhaust valve, and the control device is also used to close the exhaust valve when the dust and toxic and harmful gas concentration of the discharge chimney exceeds the second preset value. The present application realizes the automatic control of contaminated soil treatment through the cooperation of the first monitoring device, the second monitoring device and the control device. It has a high degree of intelligence, and can monitor the concentration of the air membrane space in real time, quickly identify the situation of excessive concentration, and respond to the treatment in time. At the same time, when the dust and toxic and harmful gas concentration of the discharge chimney is too high, the exhaust valve is automatically closed to avoid dust and toxic and harmful gases from being discharged into the air, causing pollution to the external environment, and improving the safety and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 An overall schematic diagram of an aerated membrane contaminated soil treatment system Figure 1 ;

[0041] Figure 2 An overall schematic diagram of an aerated membrane contaminated soil treatment system Figure 2 ;

[0042] Figure 3 A schematic top view of an aerated membrane contaminated soil treatment system;

[0043] Figure 4 An overall schematic diagram of an aerated membrane contaminated soil treatment system Figure 3 ;

[0044] Figure 5 This is an enlarged view of part A of an aerated membrane contaminated soil treatment system;

[0045] Figure 6 This is a module schematic diagram of an aerated membrane contaminated soil treatment system.

[0046] Reference numerals:

[0047] 1-air film structure; 2-thermal desorption device; 3-intake pipeline; 4-first exhaust pipeline; 5-second exhaust pipeline; 6-exhaust device; 7-treatment and emission system; 8-first monitoring device; 9-second monitoring device; 10-control device; 11-emission chimney; 12-exhaust valve; 13-anemometer; 14-pressure sensor; 15-first air supply device; 16-opening and closing valve; 18-personnel passage; 19-rain cap;

[0048] 101- membrane body; 102- lower structure; 103- air membrane space;

[0049] 201- second air supply device; 202- temperature control device;

[0050] 301 - the outlet end of the air intake pipeline; 302 - the inlet end of the air intake pipeline;

[0051] 3011-first pore;

[0052] 401 - an air inlet end of a first exhaust pipeline; 402 - an air outlet end of the first exhaust pipeline;

[0053] 4011-second pore;

[0054] 501 - air inlet end of the second exhaust pipeline; 502 - air outlet end of the second exhaust pipeline;

[0055] 701-dust filtering device; 702-gas processing device; 703-gas drying device; 704-gas cooling device;

[0056] 1701-vehicle channel; 1702-belt conveyor;

[0057] 1703-Airtight device. DETAILED DESCRIPTION

[0058] Hereinafter, various embodiments of the present invention will be described more fully. The present invention may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present invention to the specific embodiments disclosed herein, but the present invention should be understood to cover all adjustments, equivalents and / or alternatives falling within the spirit and scope of the various embodiments of the present invention.

[0059] Hereinafter, the term "include" or "may include" used in various embodiments of the present invention indicates the presence of disclosed functions, operations or elements, and does not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present invention, the terms "include", "have" and their cognates are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0060] like Figure 1-3 As shown, the present application provides an aerated membrane contaminated soil treatment system, comprising:

[0061] An air membrane structure 1, the air membrane structure 1 and the ground together form an air membrane space 103 for stacking contaminated soil;

[0062] The thermal desorption device 2 and at least one air inlet pipeline 3, the outlet ends 301 of the multiple air inlet pipelines extend in a direction away from the ground and contact the contaminated soil pile; the outlet end 301 of the air inlet pipeline is connected to the air membrane space 103, and the air inlet end 302 of the air inlet pipeline is connected to the thermal desorption device 2; the thermal desorption device 2 is used to generate hot air and transport it to the contaminated soil pile through the air inlet pipeline 3, so that the contaminated soil pile is heated to generate volatile gas;

[0063] At least one exhaust pipeline, the air inlet end of the exhaust pipeline is connected to the air membrane space 103, and the air outlet end of the exhaust pipeline is connected to the outside, so as to discharge the volatile gas generated by the polluted soil pile out of the air membrane space 103;

[0064] The treatment and exhaust system 7 is used to connect to and treat the volatile gas exhausted from the exhaust pipeline so as to discharge the treated gas.

[0065] The present application uses the air film space 103 defined by the air film structure 1 and the ground to pile up the contaminated soil pile, so as to provide a large enclosed space for treating the contaminated soil pile, which has certain economy and flexibility. In addition, by providing the air intake pipeline 3 and the thermal desorption device 2, the air intake pipeline 3 is fully in contact with the contaminated soil pile, accelerating the contaminated soil pile to be fully heated to produce volatile gases; and then the volatile gases generated by the contaminated soil pile are output through multiple exhaust pipelines, so as to facilitate the treatment of toxic and harmful substances in the volatile gases, thereby effectively improving the efficiency of contaminated soil treatment.

[0066] like Figure 1-3 As shown, at least one exhaust line includes at least one first exhaust line 4 and / or at least one second exhaust line 5.

[0067] The air inlet end 401 of the first exhaust pipeline extends in a direction away from the ground and contacts the contaminated soil pile, and the air outlet end 402 of the first exhaust pipeline is connected to the outside to discharge the volatile gas in the contaminated soil pile out of the air membrane space 103;

[0068] The air membrane structure 1 has a lower structure 102 for connecting to the ground. The air inlet end 501 of the second exhaust pipeline is connected to the lower structure 102 and the air membrane space 103. The air outlet end 502 of the second exhaust pipeline is connected to the outside world and is used to discharge volatile gases outside the contaminated soil pile out of the air membrane space 103.

[0069] When the contaminated soil pile is subjected to heat treatment, part of the volatile gas generated by the contaminated soil pile is located in the contaminated soil pile, and part of it is diffused to the air film space outside the contaminated soil pile. Due to the large volume of the air film space 103, the existing exhaust pipeline design cannot completely discharge the volatile gas, resulting in low emission rate and treatment rate. Therefore, the present application adopts two exhaust pipe arrangement methods, that is, the first exhaust pipeline 4 is directly in contact with the contaminated soil pile, which can discharge the volatile gas in the contaminated soil pile, and the second exhaust pipeline 5 is set on the lower structure 102, which can discharge the volatile gas outside the contaminated soil pile. Through the cooperation of the first exhaust pipeline 4 and the second exhaust pipeline 5, the volatile gas in the air film space 103 can be discharged more fully and quickly.

[0070] The first exhaust pipeline 4 and / or the second exhaust pipeline 5 are provided, and the number of the first exhaust pipeline 4 and the second exhaust pipeline 5 can be determined according to the actual scale of the air membrane structure.

[0071] In one embodiment, at least one exhaust pipeline includes at least one first exhaust pipeline 4, and the air inlet end 401 of at least one first exhaust pipeline extends in a direction away from the ground and contacts the contaminated soil pile. The number of first exhaust pipelines can be determined according to the size of the air membrane space 103. Generally, the number of first exhaust pipelines is multiple, and the multiple first exhaust pipelines 4 directly contact the contaminated soil pile to discharge the volatile gases in the contaminated soil pile, so that the volatile gases discharged from the contaminated soil pile can be discharged more fully and quickly.

[0072] In another embodiment, at least one exhaust pipeline includes at least one second exhaust pipeline 5. The number of first exhaust pipelines can be determined according to the size of the air membrane space 103. Generally, the number of first exhaust pipelines is multiple. The air inlet ends 501 of the multiple second exhaust pipelines are arranged along the length and / or width direction of the lower structure 102, and are all connected to the air membrane space 103. The volatile gases outside the contaminated soil pile are discharged through the multiple second exhaust pipelines 5, so that the volatile gases in the air membrane space 103 can be discharged more fully and quickly.

[0073] In this embodiment, at least one exhaust pipeline includes multiple first exhaust pipelines 4 and multiple second exhaust pipelines 5. The air inlet ends 401 of the multiple first exhaust pipelines all extend in a direction away from the ground and contact the contaminated soil pile. The air inlet ends 501 of the multiple second exhaust pipelines 5 are arranged along the length and / or width direction of the lower structure 102, and are all connected to the air membrane space 103. Two exhaust pipe arrangement methods are adopted, that is, multiple first exhaust pipelines 4 directly contact the contaminated soil pile to discharge the volatile gases in the contaminated soil pile, and multiple second exhaust pipelines 5 discharge the volatile gases outside the contaminated soil pile, so that the volatile gases in the air membrane space 103 can be discharged more fully and quickly.

[0074] like Figure 4 , 5 As shown, the outlet end 301 of the air inlet pipe has a plurality of first air holes 3011, which are arranged along the extension direction of the outlet end 301 of the air inlet pipe, and each first air hole 3011 is inclined toward the ground; the air inlet end 401 of the first exhaust pipe has a plurality of second air holes 4011, which are arranged along the extension direction of the air inlet end 401 of the first exhaust pipe, and each second air hole 4011 is inclined toward the ground.

[0075] The present application increases the full contact between hot air and the contaminated soil pile by setting multiple first air holes 3011, thereby allowing the contaminated soil pile to be fully heated to facilitate the generation of volatile gases; the multiple second air holes 4011 are set so that the volatile gases in the contaminated soil pile can be fully extracted to facilitate the subsequent treatment of the volatile gases; further, by tilting the first air holes 3011 and the second air holes 4011, the air holes can be effectively prevented from being blocked by the soil pile, thereby improving the reliability of the equipment.

[0076] like Figure 5 As shown, specifically, a portion of the outlet end 301 of the air intake pipeline is exposed to the ground and extends vertically in a direction away from the ground, and the first air holes 3011 are distributed in the portion of the outlet end 301 of the air intake pipeline exposed to the ground, for fully contacting with the contaminated soil pile, and a portion is buried in the ground and communicated with the air intake end 302 of the air intake pipeline. A portion of the air intake end 401 of the first exhaust pipeline is exposed to the ground and extends vertically in a direction away from the ground, and the second air holes 4011 are distributed in the portion of the air intake end 401 of the first exhaust pipeline exposed to the ground, for fully contacting with the contaminated soil pile, and a portion is buried in the ground and communicated with the air intake end 402 of the first exhaust pipeline.

[0077] Furthermore, in consideration of the natural rising characteristics of volatile gases, in order to achieve efficient collection and treatment of volatile gases in the contaminated soil pile, the height of the air inlet end 401 of the first exhaust pipeline and the air outlet end 301 of the air inlet pipeline (specifically, the height of the air inlet end 401 of the first exhaust pipeline from the ground and the height of the air outlet end 301 of the air inlet pipeline from the ground) are specially designed. Specifically, the height of the air inlet end 401 of the first exhaust pipeline is greater than the height of the air outlet end 301 of the air inlet pipeline, so as to utilize the principle of gas rising flow to more effectively capture and extract volatile gases, thereby ensuring the safety and efficiency of the treatment process.

[0078] like Figure 1-6 As shown, the present application provides an inflatable membrane contaminated soil treatment system, which also includes a first monitoring device 8, a second monitoring device 9, a control device 10 and an emission chimney 11. The first monitoring device 8 is used to monitor the concentration of volatile gases inside the air membrane space 103. The control device 10 is used to open the treatment and emission system 7 for treatment when the concentration of volatile gases inside the air membrane space 103 exceeds a first preset value;

[0079] The emission chimney 11 is connected to the first exhaust pipeline 4 and / or the second exhaust pipeline 5, and the second monitoring device 9 is arranged at the emission chimney 11, for monitoring the dust and toxic and harmful gas concentrations in the emission chimney 11; the emission chimney 11 is provided with an exhaust valve 12, and the control device 10 is also used to close the exhaust valve 12 when the dust and toxic and harmful gas concentrations in the emission chimney 11 exceed a second preset value.

[0080] The present application realizes the automatic control of contaminated soil treatment through the cooperation of the first monitoring device 8, the second monitoring device 9 and the control device 10. It has a high degree of intelligence and can monitor the concentration of the air film space 103 in real time, quickly identify the situation of excessive concentration, and respond to the treatment in time. When the concentration of dust and toxic and harmful gases in the chimney 11 is too high, the exhaust valve 12 is automatically closed to prevent dust and toxic and harmful gases from being discharged into the air and causing pollution to the external environment. At the same time, it is also convenient to check the treatment and emission system 7, thereby improving the safety and reliability of the system.

[0081] Furthermore, an alarm device is also included. The control device 10 is used to drive the alarm device to alarm when the exhaust valve 12 is closed, so as to provide timely warning, thereby improving the safety and reliability of the system.

[0082] In this embodiment, the second monitoring device 9 includes two groups of toxic and harmful gas sensors.

[0083] like Figure 1-6 As shown, it also includes an exhaust device 6, which is connected to the treatment and exhaust system 7 and is used to generate negative pressure to extract the volatile gas generated by the contaminated soil pile from the air film space 103 to the treatment and exhaust system 7 for treatment;

[0084] The treatment and emission system 7 includes a dust filter device 701 and a gas treatment device 702. The dust filter device 701 is arranged on the air membrane structure 1. The air inlet end 501 of the second exhaust pipeline is connected to the air membrane space 103 through the dust filter device 701, and is used to connect the volatile gas filtered by the dust filter device 701; the gas treatment device 702 is connected to the air outlet end 402 of the first exhaust pipeline and the air outlet end 502 of the second exhaust pipeline, and is used to connect the volatile gas transported by the first exhaust pipeline 4 and the second exhaust pipeline 5, and adsorb the toxic and harmful substances in the volatile gas; the discharge chimney 11 is connected to the gas treatment device 702 or the exhaust device 6, and is used to discharge the gas filtered by the gas treatment device 702. The present application filters dust through the dust filter device 701, and the gas treatment device 702 adsorbs the toxic and harmful substances in the volatile gas, and then discharges the treated gas from the discharge chimney 11, thereby improving the treatment effect.

[0085] In this embodiment, the exhaust device 6 is an exhaust fan with a power of 11 kW; the gas treatment device 702 is provided with adsorption materials such as activated carbon.

[0086] Specifically, the gas outlet end 402 of the first exhaust pipeline and the gas outlet end 502 of the second exhaust pipeline of the present application may be provided with a gas processing device 702, an exhaust chimney 11 and an exhaust device 6 in sequence, or may be provided with a gas processing device 702, an exhaust device 6 and an exhaust chimney 11 in sequence.

[0087] like Figure 1-3 As shown, the air film structure 1 also includes a film body 101 arranged on the lower structure 102, and the lower structure 102, the film body 101 and the ground together constitute an air film space 103; at least one dust filtering device 701 includes a plurality of dust filtering devices 701, and the plurality of dust filtering devices 701 are arranged at intervals along the length direction of the lower structure 102 and / or the width direction of the lower structure 102;

[0088] Each dust filtering device 701 is correspondingly configured with a second exhaust pipeline 5 and a gas processing device 702;

[0089] Or each dust filtering device 701 is correspondingly provided with a second exhaust pipeline 5, and the gas outlet ends 502 of at least two second exhaust pipelines are connected to the same activated carbon adsorption box;

[0090] Or at least two dust filtering devices 701 are jointly configured with a second exhaust pipeline 5 and a gas processing device 702 .

[0091] In one embodiment, at least one second exhaust pipeline 5 includes a second exhaust pipeline 5, at least one gas processing device 702 includes a gas processing device 702, the air inlet end 501 of the second exhaust pipeline is connected to multiple dust filtering devices 701 in sequence, and the air outlet end 502 of the second exhaust pipeline is connected to the gas processing device 702.

[0092] In another embodiment, at least one second exhaust pipeline 5 includes multiple second exhaust pipelines 5, at least one gas processing device 702 includes a gas processing device 702, the air inlet ends 501 of the multiple second exhaust pipelines correspond one-to-one with the multiple dust filtering devices 701 and are connected, and the air outlet ends 502 of the multiple second exhaust pipelines are commonly connected to a gas processing device 702.

[0093] In another embodiment, at least one second exhaust pipeline 5 includes multiple second exhaust pipelines 5, at least one gas processing device 702 includes multiple gas processing devices 702, the number of gas processing devices 702 is less than the number of second exhaust pipelines 5, the air inlet ends 501 of the multiple second exhaust pipelines correspond one-to-one and are connected to the multiple dust filtering devices 701, and the air outlet ends 502 of at least two second exhaust pipelines are connected to one gas processing device 702.

[0094] In another embodiment, at least one second exhaust pipeline 5 includes multiple second exhaust pipelines 5, at least one gas processing device 702 includes multiple gas processing devices 702, the number of second exhaust pipelines 5 is consistent with the number of gas processing devices 702, the air inlet end 501 of each second exhaust pipeline is connected to at least two dust filtering devices 701 in sequence, and the air outlet end 502 of each second exhaust pipeline is connected to a gas processing device 702.

[0095] In other embodiments, at least one second exhaust pipeline 5 includes multiple second exhaust pipelines 5, at least one gas processing device 702 includes multiple gas processing devices 702, the air inlet ends 501 of the multiple second exhaust pipelines correspond one-to-one to and are connected to the multiple dust filtering devices 701, and the air inlet ends 501 of the multiple second exhaust pipelines correspond one-to-one to and are connected to the multiple gas processing devices 702.

[0096] The specific number of the gas processing device 702 and the second exhaust pipeline 5 can be set according to the size of the air film space 103 .

[0097] like Figure 1-3 As shown, at least one anemometer 13 is provided on the top of the air membrane structure 1, and at least one pressure sensor 14 is provided inside the air membrane structure 1. The control device 10 is electrically connected to the anemometer 13 and the pressure sensor 14, and is used to determine the pressure adjustment value of the air membrane space 103 according to the wind speed outside the air membrane detected by the anemometer 13 and the pressure inside the air membrane detected by the pressure sensor 14; the inflatable membrane contaminated soil treatment system also includes a first air supply device 15, and the control device 10 is electrically connected to the first air supply device 15, and is used to drive the first air supply device 15 to supply air to the air membrane space 103 according to the pressure adjustment value of the air membrane space 103.

[0098] The present application monitors the wind speed in real time through the anemometer 13 and the pressure sensor 14 monitors the pressure in the air film space 103 in real time, and intelligently adjusts the air supply of the first air supply device 15 accordingly, thereby achieving dynamic stability of the structure. This system not only ensures the safety and stability of the air film structure 1 in a changing environment, but also reduces energy consumption and improves energy efficiency through precise control.

[0099] In this embodiment, the first air supply device 15 includes two 15KW, 50,000 cubic meters / h centrifugal fans (ventilation: 2h / 1 time); the gas treatment device 702 is an adsorption box with an air volume of 40,000m3 / h; and the pressure sensor 14 has two groups.

[0100] like Figure 5As shown, the outlet ends 301 of multiple air inlet pipelines and the air inlet ends 401 of multiple first exhaust pipelines are alternately arranged on the ground and arranged in an array; and at least a part of the air outlet ends 301 of the air inlet pipelines and at least a part of the air inlet ends 401 of the first exhaust pipelines are provided with an on-off valve 16. The present application provides the entire gas treatment system with higher flexibility and controllability by providing an on-off valve 16. By accurately controlling the switching state of the on-off valve 16, the time, speed and amount of hot gas release and gas extraction can be flexibly adjusted to meet the soil treatment requirements of different pollution degrees and properties. Secondly, the on-off valve 16 helps to improve the safety and stability of the system. During the soil remediation process, if the hot gas is released too quickly or the gas is not extracted in time, it may cause adverse conditions such as a sharp increase in soil temperature and an increase in gas pressure. Through the precise control of the on-off valve 16, these problems can be effectively avoided, further improving safety and reliability.

[0101] In one embodiment, an opening and closing valve 16 is provided at the outlet end 301 of each air inlet pipeline and the air inlet end 401 of each first exhaust pipeline, and the gas volume entering and exiting is controlled by the opening and closing valve 16, thereby effectively adjusting the time, speed and amount of hot gas release and gas extraction to meet the soil treatment requirements of different pollution degrees and properties.

[0102] like Figure 1-6 As shown, the treatment and exhaust system 7 also includes a gas drying device 703 and a gas cooling device 704. The gas drying device 703 is used to connect the volatile gas transported by the first exhaust pipeline 4 and the second exhaust pipeline 5 and dry it; the gas cooling device 704 is connected to the gas drying device 703 and is used to cool the dried volatile gas. The present application dries the water vapor in the sucked gas through the gas drying device 703, which is beneficial to the filtering efficiency of the rear end and the anti-corrosion protection of the equipment; and cools the sucked gas through the gas cooling device 704 to prevent the high temperature of the gas from damaging the subsequent equipment, thereby further improving the reliability of the system.

[0103] like Figure 1-6 As shown, an inflatable membrane contaminated soil treatment system provided by the present application also includes a vehicle passage 1701 and a belt conveyor 1702. One end of the vehicle passage 1701 is connected to the air membrane structure 1, and the other end is connected to the outside world; one end of the belt conveyor 1702 is connected to the air membrane structure 1, and the other end is connected to the outside world, and an airtight device 1703 is provided at the connection point between the belt conveyor 1702 and the air membrane structure 1. The vehicle passage 1701 and the belt conveyor 1702 are both used to realize the transportation of contaminated soil piles between the air membrane structure 1 and the outside world.

[0104] The vehicle channel 1701 and the belt conveyor 1702 are set up in the present application to transport the contaminated soil pile, which can significantly improve the transportation efficiency and flexibility, reduce the labor cost, reduce the labor intensity and enhance the adaptability of the operation through continuous operation and long-distance transportation. At the same time, it helps to reduce the scattering and diffusion of contaminated soil during transportation and treatment, reduce the risk of secondary pollution to the surrounding environment, and improve the convenience and safety of management through automated control.

[0105] Among them, the vehicle channel 1701 and the belt conveyor 1702 are located on different sides of the air membrane structure 1. The design of different sides makes the layout reasonable, avoids cross interference during transportation, and improves the overall operation efficiency; secondly, this layout is conducive to the zoning management and treatment of contaminated soil piles, and enhances the flexibility of the operation process; finally, by optimizing space utilization, the congestion and safety hazards inside the air membrane structure 1 are reduced, providing strong support for environmentally friendly and efficient contaminated soil treatment.

[0106] In one embodiment, the belt conveyor 1702 includes one or more of an underground belt conveyor 1702 , a ground belt conveyor 1702 , and an overhead belt conveyor 1702 .

[0107] The thermal desorption device 2 includes a second air supply device 201 and a temperature regulating device 202, which are arranged in sequence along the air supply direction of the air inlet pipeline 3; wherein the temperature regulating device 202 can heat or cool the air supplied.

[0108] The inflatable membrane contaminated soil treatment system also includes a personnel passage 18, which connects the air membrane space 103 with the outside world.

[0109] It should be noted that in the present invention, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0110] In the present invention, those skilled in the art need to understand that the terms indicating orientation or positional relationship herein are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0111] The terms used in various embodiments of the present invention are only used for the purpose of describing specific embodiments and are not intended to limit various embodiments of the present invention. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as the meaning generally understood by those of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as the terms defined in the dictionary generally used) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in various embodiments of the present invention.

Claims

1. An aerated membrane contaminated soil treatment system, characterized in that: include: An air membrane structure, wherein the air membrane structure and the ground together form an air membrane space for stacking contaminated soil; A thermal desorption device and at least one air inlet pipeline, wherein the air outlet end of the air inlet pipeline extends in a direction away from the ground and contacts the contaminated soil pile; the air outlet end of the air inlet pipeline is connected to the air film space, and the air inlet end of the air inlet pipeline is connected to the thermal desorption device; the thermal desorption device is used to generate hot air and transport it to the contaminated soil pile through the air inlet pipeline, so that the contaminated soil pile is heated to generate volatile gas; At least one exhaust pipeline, the air inlet end of the exhaust pipeline is connected to the air film space, and the air outlet end of the exhaust pipeline is connected to the outside, and is used to discharge the volatile gas generated by the contaminated soil pile out of the air film space; The treatment and exhaust system is used to connect to the volatile gas exhausted from the exhaust pipeline and treat it so as to discharge the treated gas.

2. The aerated membrane contaminated soil treatment system according to claim 1 is characterized in that: At least one of the exhaust lines comprises at least one first exhaust line and / or at least one second exhaust line, The air inlet end of the first exhaust pipeline extends in a direction away from the ground and contacts the contaminated soil pile, and the air outlet end of the first exhaust pipeline is connected to the outside world, so as to discharge the volatile gas in the contaminated soil pile out of the air film space; The air membrane structure has a lower structure for connecting to the ground, the air inlet end of the second exhaust pipeline is connected to the lower structure to the air membrane space, and the air outlet end of the second exhaust pipeline is connected to the outside world to discharge volatile gases outside the contaminated soil pile into the air membrane space.

3. The aerated membrane contaminated soil treatment system according to claim 2 is characterized in that: The air outlet end of the air inlet pipeline has a plurality of first air holes, the plurality of first air holes are arranged along the extension direction of the air outlet end of the air inlet pipeline, and each of the first air holes is inclined toward the ground; The air inlet end of the first exhaust pipeline has a plurality of second air holes, the plurality of second air holes are arranged along the extension direction of the air inlet end of the first exhaust pipeline, and each of the second air holes is inclined toward the ground.

4. The aerated membrane contaminated soil treatment system according to claim 2 is characterized in that: It also includes a first monitoring device, a second monitoring device, a control device and an emission chimney, wherein the first monitoring device is used to monitor the concentration of the volatile gas inside the air membrane space, and the control device is used to open the treatment and emission system for treatment when the concentration of the volatile gas inside the air membrane space exceeds a first preset value; The emission chimney is connected to the first exhaust pipeline and / or the second exhaust pipeline, and the second monitoring device is arranged at the emission chimney to monitor the dust and toxic and harmful gas concentrations in the emission chimney; the emission chimney is provided with an exhaust valve, and the control device is also used to close the exhaust valve when the dust and toxic and harmful gas concentrations in the emission chimney exceed a second preset value.

5. The aerated membrane contaminated soil treatment system according to claim 4 is characterized in that: It also includes an air extraction device, which is connected to the treatment and exhaust system and is used to generate negative pressure to extract volatile gases generated by the contaminated soil pile from the air film space to the treatment and exhaust system for treatment; The treatment and emission system comprises at least one dust filtering device and at least one gas processing device, wherein the dust filtering device is arranged on the air film structure, and the air inlet end of the second exhaust pipeline is connected with the air film space through the dust filtering device, so as to connect with the volatile gas filtered by the dust filtering device; The gas processing device is connected to the gas outlet end of the first exhaust pipeline and the gas outlet end of the second exhaust pipeline, and is used to connect the volatile gas transported by the first exhaust pipeline and the second exhaust pipeline, and adsorb toxic and harmful substances in the volatile gas; The exhaust chimney is connected to the gas processing device or the air extraction device, and is used to discharge the gas filtered by the gas processing device.

6. The aerated membrane contaminated soil treatment system according to claim 5 is characterized in that: The air film structure further comprises a film body arranged on the lower structure, and the lower structure, the film body and the ground together constitute an air film space; at least one of the dust filtering devices comprises a plurality of the dust filtering devices, and the plurality of the dust filtering devices are arranged at intervals along the length direction of the lower structure and / or the width direction of the lower structure; Wherein, each of the dust filtering devices is correspondingly configured with one of the second exhaust pipelines and one of the gas processing devices; Or each of the dust filtering devices is correspondingly configured with one of the second exhaust pipelines, and the gas outlet ends of at least two of the second exhaust pipelines are connected to the same gas processing device; Or at least two of the dust filtering devices are jointly configured with one second exhaust pipeline and one gas processing device.

7. The aerated membrane contaminated soil treatment system according to claim 4, characterized in that: At least one anemometer is provided on the top of the air film structure, and at least one pressure sensor is provided inside the air film structure. The control device is electrically connected to the anemometer and the pressure sensor, and is used to determine the pressure adjustment value of the air film space according to the wind speed outside the air film detected by the anemometer and the pressure inside the air film detected by the pressure sensor; The inflatable membrane contaminated soil treatment system also includes a first air supply device, and the control device is electrically connected to the first air supply device and is used to drive the first air supply device to supply air to the air membrane space according to the pressure adjustment value of the air membrane space.

8. The aerated membrane contaminated soil treatment system according to claim 2, characterized in that: The outlet ends of the plurality of air inlet pipes and the air inlet ends of the plurality of the first exhaust pipes are alternately arranged on the ground and arranged in an array; and at least a portion of the air outlet ends of the air inlet pipes and at least a portion of the air inlet ends of the first exhaust pipes are provided with opening and closing valves.

9. The aerated membrane contaminated soil treatment system according to claim 2, characterized in that: The treatment and exhaust system further comprises a gas drying device and a gas cooling device, wherein the gas drying device is used to connect to the volatile gas transported by the first exhaust pipeline and the second exhaust pipeline and dry the volatile gas; The gas cooling device is connected to the gas drying device and is used for cooling the dried volatile gas.

10. The aerated membrane contaminated soil treatment system according to claim 5, characterized in that: It also includes a vehicle passage and a belt conveyor, wherein one end of the vehicle passage is connected to the air film structure and the other end is connected to the outside world; one end of the belt conveyor is connected to the air film structure and the other end is connected to the outside world, and an airtight device is provided at the connection between the belt conveyor and the air film structure; And / or, the thermal desorption device comprises a second air supply device and a temperature regulating device, and the second air supply device and the temperature regulating device are sequentially arranged along the air supply direction of the air inlet pipeline; And / or, the inflatable membrane contaminated soil treatment system also includes a personnel passage, which connects the air membrane space with the outside world.

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