Highly efficient operation of constructed wetland systems in winter

Abstract

The present invention discloses a highly efficient artificial wetland system in winter. The highly efficient artificial wetland system in winter of the present invention comprises a solar greenhouse, a geothermal heat pump, an air heat pump, an artificial wetland and a ventilation component; the solar greenhouse is arranged adjacent to the artificial wetland, one end of the geothermal heat pump is used for water inlet and the other end extends to the artificial wetland for water outlet, the main part of the geothermal heat pump is buried in the underground soil, both ends of the air heat pump are located in the solar greenhouse and the main part of the air heat pump is passed through the artificial wetland, one end of the ventilation component is located outdoors of the solar greenhouse and the other end extends to the underground part of the artificial wetland, part of the ventilation component is passed through the solar greenhouse, and the ventilation component is used to ventilate the artificial wetland. The highly efficient artificial wetland system in winter of the present invention has the advantages of simple and convenient operation, low operating cost, good water treatment effect and good benefits.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to an artificial wetland system that operates efficiently in winter. Background Art

[0002] Constructed wetlands have become an important means of water management. The biochemical effect plays a decisive role in sewage treatment in artificial wetlands. The low temperature and lack of dissolved oxygen in winter will greatly affect the treatment efficiency of artificial wetlands. Too low temperature will reduce the enzyme activity in organisms and the survival ability of organisms, thereby reducing the treatment efficiency of artificial wetlands. For high-latitude areas, when the temperature drops and the water surface freezes, the reoxygenation process of the atmosphere into the water will be cut off. The aerobic respiration of microorganisms in the water consumes a large amount of dissolved oxygen. The freezing of the water surface caused by the drop in temperature makes the reoxygenation capacity of the air lower than the oxygen consumption of the microorganisms, which is not conducive to the life activities of the microorganisms and leads to reduced treatment efficiency.

[0003] It can be seen that winter insulation for artificial wetlands is more important. At present, there are many insulation measures for artificial wetlands in winter. Such as film covering, ice covering, plant covering, greenhouse, compost heating, anaerobic fermentation combustion heating, shallow geothermal, etc. For example, the artificial wetland is built in a self-circulating pool. In order to ensure the aeration effect at the bottom of the wetland, the bottom of the artificial wetland needs to be kept at a certain distance from the bottom of the self-circulating pool. However, this treatment is very difficult for the transformation of the original large-scale artificial wetlands, and the cost of new construction is high. For another example, after the artificial wetland plants are partially harvested, anaerobic fermentation is used to produce biogas, and then the heat energy generated by the combustion of biogas is used to warm the sewage near the roots of artificial wetland plants, thereby improving the sewage treatment effect of artificial wetlands in winter; in this method, the biogas production varies, and it is difficult to ensure the stability of biogas combustion. In addition, a large amount of greenhouse gases will be generated during the combustion of biogas, which needs to be treated and discharged, which will invisibly increase additional costs. For example, aeration pipes are laid at the bottom of artificial wetlands, and mechanical aeration methods such as blowers are used to increase the dissolved oxygen in the water. This method requires continuous consumption of electricity and is relatively costly. Summary of the invention

[0004] Based on this, it is necessary to provide a winter high-efficiency artificial wetland system. The winter high-efficiency artificial wetland system of the present invention has low cost, good water treatment effect and good benefits.

[0005] An embodiment of the present application provides a constructed wetland system that operates efficiently in winter.

[0006] A highly efficient artificial wetland system for winter operation comprises a solar greenhouse, a geothermal heat pump, an air heat pump, an artificial wetland and a ventilation component; the solar greenhouse is arranged adjacent to the artificial wetland, one end of the geothermal heat pump is used for water intake and the other end extends into the artificial wetland for water discharge, the main body of the geothermal heat pump is buried in the underground soil, both ends of the air heat pump are located in the solar greenhouse and the main body of the air heat pump is passed through the artificial wetland, one end of the ventilation component is located outside the solar greenhouse and the other end extends to the underground part of the artificial wetland, part of the ventilation component is passed through the solar greenhouse, and the ventilation component is used to ventilate the artificial wetland.

[0007] In some of the embodiments, the winter high-efficiency artificial wetland system further includes a front-end filter assembly, which is used to filter the water to be treated, and one end of the geothermal heat pump is connected to the front-end filter assembly for water intake.

[0008] In some embodiments, the front-end filter assembly includes a front-end filter tank body and a filter element filled in the front-end filter tank body, and the filter element includes one or more of gravel, pebbles and discarded bricks.

[0009] In some embodiments, the solar greenhouse includes a greenhouse wall, a light-transmitting and heat-insulating layer, a thermal insulation layer, an anaerobic fermentation layer and an air duct. The light-transmitting and heat-insulating layer is installed on the top of the greenhouse wall and seals the top of the greenhouse wall. The greenhouse wall and the light-transmitting and heat-insulating layer form a sealed greenhouse. The inner wall of the greenhouse wall is connected to the thermal insulation layer. The anaerobic fermentation layer is buried in the underground soil under the greenhouse wall. One end of the air duct is located in the anaerobic fermentation layer and the other end is located in the greenhouse.

[0010] In some of these embodiments, the greenhouse wall is installed in the underground soil;

[0011] And / or, there are multiple airway tubes, and the multiple airway tubes are distributed at intervals;

[0012] And / or, the main body of the geothermal heat pump is buried in the soil below the anaerobic fermentation layer.

[0013] In some of the embodiments, the main body of the geothermal heat pump located in the soil below the anaerobic fermentation layer is in a tortuous shape.

[0014] In some embodiments, the thermal insulation layer includes one or more of a rock wool layer, a slag wool layer, a polyurethane layer, and a polystyrene layer;

[0015] And / or, the thermal insulation layer is a black coating layer applied to the inner wall of the greenhouse wall.

[0016] In some embodiments, the light-transmitting and heat-insulating layer includes one or both of a plastic film and transparent glass;

[0017] And / or, the light-transmitting and heat-insulating layer is one layer or multiple layers.

[0018] In some embodiments, the artificial wetland includes a wetland soil layer, aquatic plants, a ceramsite filler layer, a zeolite filler layer and a gravel filler layer. The aquatic plants are planted in the wetland soil layer, and the ceramsite filler layer, the zeolite filler layer and the gravel filler layer are distributed in sequence below the wetland soil layer.

[0019] In some of the embodiments, the main body of the air heat pump is in a tortuous shape, and the main body of the air heat pump is arranged around the wetland soil layer, the ceramsite filler layer and the zeolite filler layer.

[0020] In some of the embodiments, the geothermal heat pump extends into the expanded clay filler layer for discharging water to the expanded clay filler layer.

[0021] In some embodiments, the ventilation assembly includes an air inlet and a ventilation pipe, wherein the air inlet is used for intake of air, the air inlet is connected to one end of the ventilation pipe, a portion of the ventilation pipe is located inside the solar greenhouse, the other end of the ventilation pipe extends into the gravel filling layer, and the portion of the ventilation pipe located inside the gravel filling layer has a plurality of ventilation holes.

[0022] In some embodiments, the ventilation assembly also includes a rotating part, the air inlet of the air inlet part is trumpet-shaped, the air inlet part is dynamically sealed to the ventilation pipe through the rotating part, and the air inlet part can rotate 360° in a horizontal plane relative to the ventilation pipe.

[0023] In some of the embodiments, a portion of the pipe where the air inlet member is connected to the ventilation pipe is in a tortuous shape.

[0024] In some embodiments, the aquatic plant is a plant with a well-developed root system, a large biomass and ornamental value;

[0025] And / or, the aquatic plants include one or more of canna, calamus, reed, lily of the valley and cattail.

[0026] The above-mentioned winter high-efficiency artificial wetland system introduces the water to be treated into the underground geothermal heat pump, heats the water to be treated through the geothermal heat pump, and increases the water inlet temperature of the artificial wetland. Secondly, the heat absorption and heat preservation effect of solar thermal radiation and greenhouse gases are used to rely on the air circulation formed by the temperature difference between the solar greenhouse and the artificial wetland for heat exchange, so as to achieve the purpose of heating the inside of the artificial wetland. At the same time, ventilation components are used to control the wind speed and wind direction, and the artificial wetland is naturally aerated. The above-mentioned winter high-efficiency artificial wetland system has the advantages of simple and convenient operation, low operating cost, good water treatment effect and good benefits.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention uses geothermal energy to heat the wetland inlet water, utilizes the heat absorption and heat preservation effects of solar thermal radiation and greenhouse gases, and completely relies on the temperature difference between the solar greenhouse and the artificial wetland to form air circulation flow, thereby achieving the purpose of heating and heat preservation of the internal filling area of ​​the artificial wetland. In addition to the infrastructure construction costs, the entire process does not require additional power. Compared with traditional technologies, the operating cost of the system of the present invention is extremely low.

[0029] (2) The present invention uses a ventilation component to achieve natural ventilation aeration. The air inlet is connected to the ventilation pipe through a rotating member. The air inlet of the air inlet is trumpet-shaped. The air inlet can rotate 360 ​​degrees relative to the ventilation pipe in the horizontal plane. It can effectively adapt to different wind direction changes and effectively control wind speed and wind direction. It is simple to operate and can effectively enhance the oxygen transfer and diffusion inside the wetland, significantly improve its reoxygenation capacity, thereby enhancing aerobic processes such as ammoniation, nitrification and aerobic biodegradation of organic matter in artificial wetlands. Compared with traditional mechanical aeration methods, no additional energy input is required, and the operating cost of the system of the present invention is extremely low. Furthermore, the trumpet-shaped air inlet and the part of the pipeline connected to the ventilation pipe are in a tortuous bending shape. For example, the pipeline part of the air inlet is set to be bent in a "J" shape, which can also prevent the reduction of total nitrogen removal rate due to excessive wind speed and play a controlling role in wind speed.

[0030] (3) The above-mentioned high-efficiency operation of the artificial wetland system in winter introduces the water to be treated into the underground geothermal heat pump. The main part of the geothermal heat pump is tortuous and the incoming water is bent and deflected in the buried geothermal heat pump pipeline. The water to be treated is heated by the up and down deflection method, which increases the contact time and contact area between the incoming water and the soil heat source. The heat exchange between the two is more sufficient, which helps to increase the water temperature of the wetland inlet water in winter and improve the inlet water temperature of the artificial wetland.

[0031] (4) The present invention adopts a front-end filter component installed at the water inlet of the artificial wetland. The front-end filter component mainly filters particulate matter in the water to be treated to prevent the water inlet from being blocked in the geothermal heat pump.

[0032] (5) The solar greenhouse of the present invention uses the carbon dioxide produced by the anaerobic fermentation layer to fill the sealed greenhouse of the solar greenhouse, thereby improving its heat absorption and heat preservation effects. The light-transmitting heat-insulating layer on the top of the solar greenhouse helps to irradiate sunlight, and a heat-insulating layer is provided around and at the bottom of the solar greenhouse, thereby improving the heat absorption and heat preservation effects. The hot air in the sealed greenhouse will flow upward through the air inlet of the air heat pump into the artificial wetland with a lower temperature, and heat exchange will be carried out in the artificial wetland to increase the temperature of the filling material inside the artificial wetland. At the same time, the temperature of the hot air in the air heat pump will decrease and become cold air, and the air density will increase. It will move downward and flow back into the sealed greenhouse of the solar greenhouse for reheating, and the cycle will continue. The temperature difference between the solar greenhouse and the artificial wetland will be used to cause gas circulation, thereby increasing the temperature of the filling material area inside the artificial wetland.

[0033] (6) The main body of the air heat pump of the present invention is in a winding shape, and the main body of the air heat pump is arranged around the wetland soil layer, the expanded clay filler layer and the zeolite filler layer. For example, the air heat pump is arranged around and bent in the wetland soil layer, the expanded clay filler layer and the zeolite filler layer of the artificial wetland in a "J"-shaped bending manner with up and down deflection, so as to achieve heat exchange, increase the contact time and contact area between the air heat pump and the soil, and make the heat exchange between the two more sufficient, which helps to increase the temperature of the artificial wetland in winter and can evenly increase the temperature of the corresponding area in the artificial wetland. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0035] In order to more completely understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0036] Figure 1 This is a schematic diagram of a highly efficient constructed wetland system in winter according to an embodiment of the present invention.

[0037] Description of Reference Numerals

[0038] 10. High-efficiency operation of artificial wetland system in winter; 100. Solar greenhouse; 101. Greenhouse wall; 102. Translucent and heat-insulating layer; 103. Insulating layer; 104. Anaerobic fermentation layer; 105. Air duct; 106. Sealed greenhouse; 200. Geothermal heat pump; 300. Air heat pump; 400. Artificial wetland; 401. Wetland soil layer; 402. Aquatic plants; 403. Ceramic filler layer; 404. Zeolite filler layer; 405. Gravel filler layer; 406. Wetland wall; 407. Drain pipe; 500. Ventilation assembly; 501. Air inlet; 502. Ventilation pipe; 503. Rotating part; 600. Front-end filter assembly. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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 connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0045] The embodiment of the present application provides a winter high-efficiency artificial wetland system 10 to solve the problems of great difficulty in renovating existing artificial wetlands and high costs for new construction; the existing artificial wetlands use anaerobic fermentation of plant parts after harvest to produce biogas for warming, and the biogas production varies, making it difficult to ensure stable biogas combustion, and the large amount of greenhouse gases generated during biogas combustion are expensive to handle and discharge; and the existing artificial wetlands use aeration pipes at the bottom and use mechanical aeration methods such as blowers to increase dissolved oxygen in the water body, which requires continuous consumption of electricity and is costly. The following will explain the winter high-efficiency artificial wetland system 10 in conjunction with the accompanying drawings.

[0046] The winter high-efficiency artificial wetland system 10 provided in the embodiment of the present application is exemplary, see Figure 1 As shown, Figure 1 Schematic diagram of a high-efficiency constructed wetland system 10 for winter operation provided by an embodiment of the present application. The high-efficiency constructed wetland system 10 for winter operation of the present application can operate efficiently and stably in winter.

[0047] In order to more clearly illustrate the structure of the artificial wetland system 10 for high efficiency operation in winter, the artificial wetland system 10 for high efficiency operation in winter will be introduced below with reference to the accompanying drawings.

[0048] For example, see Figure 1 As shown, an exemplary, highly efficient constructed wetland system 10 for winter operation includes a solar greenhouse 100 , a geothermal heat pump 200 , an air heat pump 300 , a constructed wetland 400 and a ventilation assembly 500 .

[0049] The solar greenhouse 100 is disposed adjacent to the artificial wetland 400. One end of the geothermal heat pump 200 is used for water intake and the other end extends into the artificial wetland 400 for water discharge into the artificial wetland 400. The main body of the geothermal heat pump 200 is buried in the underground soil.

[0050] Both ends of the air heat pump 300 are located in the solar greenhouse 100 and the main body of the air heat pump 300 is disposed in the artificial wetland 400 .

[0051] One end of the ventilation assembly 500 is located outside the solar greenhouse 100 and the other end extends to the underground part of the artificial wetland 400. Part of the ventilation assembly 500 is arranged in the solar greenhouse 100, and the ventilation assembly 500 is used to ventilate the artificial wetland 400.

[0052] In some of these examples, see Figure 1 As shown, the winter high-efficiency operation artificial wetland system 10 also includes a front-end filter assembly 600. The front-end filter assembly 600 is used to filter the water body to be treated, and one end of the geothermal heat pump 200 is connected to the front-end filter assembly 600 for water intake. In this embodiment, a front-end filter assembly 600 is provided at the water inlet of the artificial wetland 400 to filter particulate matter in the water body to be treated, and prevent the water intake from being blocked in the geothermal heat pump 200.

[0053] In some embodiments, the front-end filter assembly 600 includes a front-end filter tank body and a filter element filled in the front-end filter tank body. The filter element includes one or more of gravel, pebbles and discarded bricks. The specific composition of the filter element can be set according to the actual needs of the water body to be treated.

[0054] In some embodiments, the solar greenhouse 100 includes a greenhouse wall 101, a light-transmitting and heat-insulating layer 102, a heat-insulating layer 103, an anaerobic fermentation layer 104, and an air duct 105. The light-transmitting and heat-insulating layer 102 is installed on the top of the greenhouse wall 101 and seals the top of the greenhouse wall 101. The greenhouse wall 101 and the light-transmitting and heat-insulating layer 102 form a sealed greenhouse 106. The inner wall of the greenhouse wall 101 is connected to the heat-insulating layer 103. The anaerobic fermentation layer 104 is buried in the underground soil under the greenhouse wall 101. One end of the air duct 105 is located in the anaerobic fermentation layer 104 and the other end is located in the greenhouse. The air duct 105 can guide the carbon dioxide gas with a certain temperature generated by the anaerobic fermentation layer 104 into the sealed greenhouse 106.

[0055] In some of the embodiments, the anaerobic fermentation layer 104 may selectively utilize one or more of human and animal feces, crop straw, and weed stems and leaves. Under the activity of soil microorganisms, the organic matter in the human and animal feces, crop straw, and weed stems and leaves may decompose to produce carbon dioxide gas with a certain temperature.

[0056] In some of these embodiments, the greenhouse wall 101 is installed in the underground soil.

[0057] In some of these examples, see Figure 1 As shown, there are multiple air guide tubes 105, and the multiple air guide tubes 105 are distributed at intervals. Preferably, the air guide tubes 105 are distributed at equal intervals.

[0058] In some of these examples, see Figure 1 As shown, the main body of the geothermal heat pump 200 is buried in the soil below the anaerobic fermentation layer 104 .

[0059] In some of these examples, see Figure 1 As shown, the main part of the geothermal heat pump 200 located in the soil below the anaerobic fermentation layer 104 is in a tortuous shape. Preferably, the main part of the geothermal heat pump 200 located in the soil below the anaerobic fermentation layer 104 is bent up and down in a "J" shape. It is not difficult to understand that in other specific examples, the main part of the geothermal heat pump 200 located in the soil below the anaerobic fermentation layer 104 can also be bent in an "S" shape. The shape of the bend of the main part of the geothermal heat pump 200 located in the soil below the anaerobic fermentation layer 104 is not specifically limited.

[0060] In some embodiments, the insulation layer 103 includes one or more of a rock wool layer, a slag wool layer, a polyurethane layer, and a polystyrene layer. The insulation layer 103 can effectively maintain the temperature in the sealed greenhouse 106 .

[0061] In some of the embodiments, the insulation layer 103 is a black coating layer applied to the inner wall of the greenhouse wall 101 .

[0062] In some embodiments, the light-transmitting heat-insulating layer 102 includes one or both of a plastic film and transparent glass.

[0063] In some embodiments, the light-transmitting heat-insulating layer 102 is one layer or multiple layers.

[0064] In some of these examples, see Figure 1 As shown, the artificial wetland 400 includes a wetland soil layer 401, aquatic plants 402, a ceramsite filler layer 403, a zeolite filler layer 404 and a gravel filler layer 405. The aquatic plants 402 are planted in the wetland soil layer 401, and the ceramsite filler layer 403, the zeolite filler layer 404 and the gravel filler layer 405 are distributed in sequence below the wetland soil layer 401.

[0065] In some embodiments, the main body of the air heat pump 300 is in a winding shape, and the main body of the air heat pump 300 is arranged around the wetland soil layer 401, the ceramsite filler layer 403 and the zeolite filler layer 404. Figure 1 As shown, the main body of the air heat pump 300 is bent up and down in a "J" shape. It is not difficult to understand that the main body of the air heat pump 300 can also be in a bent shape.

[0066] In some of the embodiments, the geothermal heat pump 200 extends into the expanded clay filler layer 403 to discharge water to the expanded clay filler layer 403 .

[0067] In some of the embodiments, the aquatic plants 402 are plants with well-developed root systems, large biomass, and ornamental value.

[0068] In some embodiments, the aquatic plants 402 include one or more of canna, calamus, reed, lily of the valley, and cattail.

[0069] In some of these embodiments, see Figure 1 As shown, the artificial wetland 400 can be built by a wetland wall 406. Preferably, one of the wetland walls 406 of the artificial wetland 400 can be shared with one of the greenhouse walls 101 of the solar greenhouse 100, which can save materials and reduce costs. Preferably, the wetland wall 406 and the greenhouse wall 101 can be constructed with cement, bricks, sand and gravel, etc., which can be determined according to local actual conditions.

[0070] In some embodiments, the artificial wetland 400 further includes a drainage pipe 407 . One end of the drainage pipe 407 is located in the zeolite packing layer 404 , and the other end extends to the outside of the wetland wall 406 , so as to drain excess water in the artificial wetland 400 .

[0071] In some of these examples, see Figure 1As shown, the ventilation assembly 500 includes an air inlet 501 and a ventilation pipe 502. The air inlet 501 is used for air intake, and the air inlet 501 is connected to one end of the ventilation pipe 502. Part of the ventilation pipe 502 is located in the solar greenhouse 100, and the other end of the ventilation pipe 502 extends into the gravel filling layer 405. The part of the ventilation pipe 502 located in the gravel filling layer 405 has a plurality of ventilation holes.

[0072] In some of these examples, see Figure 1 As shown, the ventilation assembly 500 further includes a rotating member 503. The air inlet of the air inlet member 501 is trumpet-shaped, and the air inlet member 501 is dynamically sealed to the ventilation pipe 502 through the rotating member 503. The air inlet member 501 can rotate 360 ​​degrees relative to the ventilation pipe 502 in a horizontal plane.

[0073] In some embodiments, the portion of the pipe connecting the air inlet 501 and the ventilation pipe 502 is in a tortuous shape. Figure 1 As shown, the portion of the pipe connecting the air inlet member 501 and the ventilation pipe 502 is bent up and down in a "J" shape. The portion of the pipe connecting the air inlet member 501 and the ventilation pipe 502 can also be in other bending shapes, which can achieve disturbance of the incoming air, reduce the wind speed, prevent the reduction of the total nitrogen removal rate due to excessive wind speed, and play a role in controlling the wind speed.

[0074] In some of the embodiments, the preparation materials of the air heat pump 300, the preparation materials of the geothermal heat pump 200, and the preparation materials of the ventilation pipe 502 can be independently selected from polyethylene pipes.

[0075] The above-mentioned winter high-efficiency operation artificial wetland system 10 introduces the water body to be treated into the underground geothermal heat pump 200, heats the water body to be treated by the geothermal heat pump 200, and improves the water inlet temperature of the artificial wetland 400. Secondly, the heat absorption and heat preservation effect of solar thermal radiation and greenhouse gases are used to rely on the air circulation formed by the temperature difference between the solar greenhouse 100 and the artificial wetland 400 to exchange heat, so as to achieve the purpose of heating the inside of the artificial wetland 400. At the same time, the ventilation component 500 is used to control the wind speed and wind direction, and the artificial wetland 400 is naturally aerated. The above-mentioned winter high-efficiency operation artificial wetland system 10 has the advantages of simple and convenient operation, low operating cost, good water treatment effect and good benefits.

[0076] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0077] (1) The present invention uses geothermal energy to heat the wetland inlet water, utilizes the heat absorption and heat preservation effects of solar thermal radiation and greenhouse gases, and completely relies on the temperature difference between the solar greenhouse 100 and the artificial wetland 400 to form air circulation flow, thereby achieving the purpose of heating and heat preservation of the internal filling area of ​​the artificial wetland 400. The entire process does not require additional power except for the infrastructure costs. Compared with traditional technologies, the operating cost of the system of the present invention is extremely low.

[0078] (2) The present invention uses a ventilation assembly 500 to achieve natural ventilation aeration. The air inlet 501 is connected to the ventilation pipe 502 through a rotating member 503. The air inlet of the air inlet 501 is trumpet-shaped. The air inlet 501 can rotate at an angle of 360° in the horizontal plane relative to the ventilation pipe 502, which can effectively adapt to different wind direction changes, effectively control wind speed and wind direction, and is simple to operate. It can effectively enhance the oxygen transfer and diffusion inside the wetland, significantly improve its reoxygenation capacity, thereby enhancing the aerobic processes such as ammoniation, nitrification and aerobic biodegradation of organic matter in the artificial wetland 400. Compared with the traditional mechanical aeration method, no additional energy input is required, and the operating cost of the system of the present invention is extremely low. Furthermore, the part of the pipeline connecting the trumpet-shaped air inlet 501 and the ventilation pipe 502 is in a tortuous bending shape. For example, the pipeline part of the air inlet 501 is set to be bent in a "J" shape, which can also prevent the reduction of the total nitrogen removal rate caused by excessive wind speed, and play a control role in the wind speed.

[0079] (3) The above-mentioned high-efficiency operation of the artificial wetland system 10 in winter introduces the water body to be treated into the underground geothermal heat pump 200. The main part of the geothermal heat pump 200 is tortuous and curved, and the incoming water is bent and deflected in the buried geothermal heat pump 200 pipeline. The water body to be treated is heated by the up and down deflection method, which increases the contact time and contact area between the incoming water and the soil heat source. The heat exchange between the two is more sufficient, which helps to increase the water temperature of the wetland inlet water in winter and improve the inlet water temperature of the artificial wetland 400.

[0080] (4) The present invention adopts a front-end filter assembly 600 disposed at the water inlet of the artificial wetland 400. The front-end filter assembly 600 mainly filters particulate matter in the water to be treated to prevent the inlet water from being blocked in the geothermal heat pump 200.

[0081] (5) The solar greenhouse 100 of the present invention uses the carbon dioxide produced by the anaerobic fermentation layer 104 to fill the sealed greenhouse 106 of the solar greenhouse 100, thereby improving its heat absorption and heat preservation effects. The light-transmitting heat-insulating layer 102 on the top of the solar greenhouse 100 helps to irradiate sunlight, and the heat-insulating layer 103 is arranged around and at the bottom of the solar greenhouse 100, thereby improving the heat absorption and heat preservation effects. The hot air in the sealed greenhouse 106 will flow upward through the air inlet of the air heat pump 300 into the artificial wetland 400 with a lower temperature, and heat exchange will be carried out in the artificial wetland 400 to increase the temperature of the filling material inside the artificial wetland 400. At the same time, the temperature of the hot air in the air heat pump 300 will decrease and become cold air, and the air density will increase. The hot air will move downward and flow back into the sealed greenhouse 106 of the solar greenhouse 100 for reheating. In this way, the temperature difference between the solar greenhouse 100 and the artificial wetland 400 will cause gas circulation, thereby increasing the temperature of the filling material area inside the artificial wetland 400.

[0082] (6) The main part of the air heat pump 300 of the present invention is in a tortuous shape, and the main part of the air heat pump 300 is arranged around the wetland soil layer 401, the expanded clay filler layer 403 and the zeolite filler layer 404. For example, the air heat pump 300 is arranged around and bent in the wetland soil layer 401, the expanded clay filler layer 403 and the zeolite filler layer 404 of the artificial wetland 400 in a "J"-shaped bending manner with up and down deflection, so as to achieve heat exchange and increase the contact time and contact area between the air heat pump 300 and the soil. The heat exchange between the two is more sufficient, which helps to increase the temperature of the artificial wetland 400 in winter and can evenly increase the temperature of the corresponding areas in the artificial wetland 400.

[0083] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A highly efficient artificial wetland system in winter, characterized in that: The invention comprises a solar greenhouse, a geothermal heat pump, an air heat pump, an artificial wetland and a ventilation component; the solar greenhouse is arranged adjacent to the artificial wetland, one end of the geothermal heat pump is used for water inlet and the other end extends to the artificial wetland for water outlet, the main body of the geothermal heat pump is buried in the underground soil, both ends of the air heat pump are located in the solar greenhouse and the main body of the air heat pump is passed through the artificial wetland, one end of the ventilation component is located outside the solar greenhouse and the other end extends to the underground part of the artificial wetland, and the ventilation component is partially The solar greenhouse is provided at different positions, the ventilation assembly is used to ventilate the artificial wetland, the solar greenhouse includes a greenhouse wall, a light-transmitting and heat-insulating layer, a thermal insulation layer, an anaerobic fermentation layer and an air duct, the light-transmitting and heat-insulating layer is installed on the top of the greenhouse wall and seals the top of the greenhouse wall, the greenhouse wall and the light-transmitting and heat-insulating layer form a sealed greenhouse, the inner wall of the greenhouse wall is connected to the thermal insulation layer, the anaerobic fermentation layer is buried in the underground soil under the greenhouse wall, one end of the air duct is located in the anaerobic fermentation layer and the other end is located in the greenhouse.

2. The winter high-efficiency artificial wetland system according to claim 1 is characterized in that: The winter high-efficiency artificial wetland system also includes a front-end filter component, which is used to filter the water to be treated. One end of the geothermal heat pump is connected to the front-end filter component for water intake.

3. The winter high-efficiency artificial wetland system according to claim 2 is characterized in that: The front-end filter assembly comprises a front-end filter tank body and a filter element filled in the front-end filter tank body, and the filter element comprises one or more of crushed stones, pebbles and discarded bricks.

4. The winter high-efficiency artificial wetland system according to claim 1 is characterized in that: The greenhouse wall is installed in the underground soil; And / or, there are multiple air guide tubes, and the multiple air guide tubes are distributed at intervals.

5. The winter high-efficiency artificial wetland system according to claim 1 is characterized in that: The main body of the geothermal heat pump is buried in the soil below the anaerobic fermentation layer.

6. The winter high-efficiency artificial wetland system according to claim 1 is characterized in that: The main body of the geothermal heat pump located in the soil below the anaerobic fermentation layer is in a tortuous shape.

7. The winter high-efficiency artificial wetland system according to claim 1 is characterized in that: The thermal insulation layer includes one or more of a rock wool layer, a slag wool layer, a polyurethane layer and a polystyrene layer; And / or, the thermal insulation layer is a black coating layer applied to the inner wall of the greenhouse wall.

8. The winter high-efficiency artificial wetland system according to claim 1, characterized in that: The light-transmitting and heat-insulating layer comprises one or both of a plastic film and transparent glass; And / or, the light-transmitting and heat-insulating layer is one layer or multiple layers.

9. The winter high-efficiency artificial wetland system according to any one of claims 1 to 8, characterized in that: The artificial wetland includes a wetland soil layer, aquatic plants, a ceramsite filler layer, a zeolite filler layer and a crushed stone filler layer. The aquatic plants are planted in the wetland soil layer, and the ceramsite filler layer, the zeolite filler layer and the crushed stone filler layer are sequentially distributed below the wetland soil layer.

10. The winter high-efficiency artificial wetland system according to claim 9, characterized in that: The main body of the air heat pump is in a winding shape, and the main body of the air heat pump is arranged around the wetland soil layer, the ceramsite filler layer and the zeolite filler layer.

11. The winter high-efficiency artificial wetland system according to claim 9, characterized in that: The geothermal heat pump extends into the expanded clay filler layer to discharge water to the expanded clay filler layer.

12. The winter high-efficiency artificial wetland system according to claim 9, characterized in that: The ventilation assembly includes an air inlet and a ventilation pipe. The air inlet is used for air intake. The air inlet is connected to one end of the ventilation pipe. Part of the ventilation pipe is located in the solar greenhouse. The other end of the ventilation pipe extends into the gravel filling layer. The part of the ventilation pipe located in the gravel filling layer has a plurality of ventilation holes.

13. The winter high-efficiency artificial wetland system according to claim 12, characterized in that: The ventilation assembly also includes a rotating member, the air inlet of the air inlet member is trumpet-shaped, the air inlet member is dynamically sealed and connected to the ventilation pipe through the rotating member, and the air inlet member can rotate at an angle of 360° in a horizontal plane relative to the ventilation pipe.

14. The winter high-efficiency artificial wetland system according to claim 12, characterized in that: The portion of the pipeline connecting the air inlet member and the ventilation pipe is in a circuitous curved shape.

15. The winter high-efficiency artificial wetland system according to claim 9, characterized in that: The aquatic plants are plants with well-developed root systems, large biomass and ornamental value; And / or, the aquatic plants include one or more of canna, calamus, reed, lily of the valley and cattail.

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