Landfill leachate circulating treatment device

Abstract

The utility model discloses a landfill leachate circulating treatment device, which comprises a water tank, a water inlet pipe, a water outlet pipe, a water outlet pipe and a water outlet pipe, wherein the water tank is used for containing landfill leachate and realizing water circulation through a water pump and a pipeline; the photocatalysis unit is arranged in a water circulation pipeline; the catalytic unit comprises a foamed ceramic carrier loaded with photocatalytic active components and an ultraviolet LED light source, the foamed ceramic carrier is arranged in the water storage disc, and the foamed ceramic carrier soaked in the landfill leachate is irradiated by the ultraviolet LED light source to be purified. According to the landfill leachate circulating treatment device, the concentration of organic matters in leachate is effectively degraded through the landfill leachate circulating treatment device according to the photocatalysis principle, the performance is stable, and COD and BOD in water can be efficiently degraded.

Description

Technical Field

[0001] The utility model relates to water treatment equipment, in particular to a garbage leachate circulation treatment device. Background Art

[0002] Landfill leachate refers to a high-concentration wastewater formed by the water contained in the garbage in the landfill, the rainwater and snow water entering the landfill, and other water, minus the saturated water holding capacity of the garbage and the covering soil layer, and passing through the garbage layer and the covering soil layer. The water quality of landfill leachate is quite complex, generally containing high concentrations of organic matter, heavy metal salts, SS and ammonia nitrogen. Landfill leachate not only pollutes the soil and surface water sources, but also pollutes groundwater. There have been many studies on the removal of COD (Chemical Oxygen Demand) in landfill leachate. Generally, biological treatment is used, but the treatment effect is not very ideal, and the operating cost is relatively high.

[0003] Leachate is the product of the gravity flow of liquid in the landfill, mainly from precipitation and the inherent water of the garbage itself. Since there are many factors that may affect the properties of the leachate during the flow of the liquid, including physical factors, chemical factors, and biological factors, the properties of the leachate vary within a fairly large range. Generally speaking, its pH value is between 4 and 9, COD is in the range of 2000 to 62000 mg / L, BOD5 (Biochemical Oxygen Demand) is from 60 to 45000 mg / L, and the concentration of heavy metals is basically the same as that of heavy metals in municipal sewage. The leachate from the urban landfill is a complex high-concentration organic wastewater. If it is directly discharged into the environment without treatment, it will cause serious environmental pollution. For the purpose of protecting the environment, it is essential to effectively treat the leachate.

[0004] In recent years, photocatalytic purification technology has become an environmental pollution control technology with good application prospects due to its mild reaction conditions, good stability, and thorough purification effect. Titanium dioxide (TiO2) has good photocorrosion resistance and catalytic activity, and is stable, cheap, easy to obtain, non-toxic and harmless. It is currently recognized as the best photocatalyst.

[0005] Titanium dioxide photocatalysts are usually used in powder form. In practical applications, titanium dioxide needs to be fixed on a carrier to overcome the shortcomings of suspended phase titanium dioxide photocatalysts. At present, the carrier materials mainly include glass carriers such as glass sheets, glass fiber meshes, etc., ceramic carriers such as alumina ceramic sheets, honeycomb ceramic columns, foam ceramics, etc., and metal carriers such as titanium sheets, stainless steel plates, nickel foams, etc. The usual loading method is the titanium colloid loading method or the method of adding titanium oxide grains to the binder loading method, and then sintering at high temperature to prepare a loaded photocatalyst.

[0006] In order to efficiently treat landfill leachate, there is an urgent need for a landfill leachate circulation treatment device with stable performance, especially more obvious COD removal effect.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0008] The utility model aims to utilize the photocatalytic principle to effectively degrade the concentration of organic matter in the leachate through the garbage leachate circulation treatment device, has stable performance, and is helpful for efficiently degrading COD and BOD in water.

[0009] To achieve the above-mentioned purpose, the utility model provides a garbage leachate circulation treatment device, comprising: a water tank, which is used to contain garbage leachate and realize water circulation through a water pump and a pipeline; a photocatalytic unit, which is arranged in the water circulation pipeline; the catalytic unit includes a foam ceramic carrier loaded with photocatalytic active components and an ultraviolet LED light source, the foam ceramic carrier is arranged in a water storage tray, and the foam ceramic carrier immersed in the garbage leachate is irradiated by the ultraviolet LED light source for purification treatment.

[0010] Furthermore, in the above technical solution, the foam ceramic carrier may be a foam ceramic plate or a foam ceramic ball.

[0011] Furthermore, in the above technical solution, there can be multiple water storage trays arranged in layers. The leachate pumped by the water pump enters the top water storage tray and overflows to the lower water storage tray. The leachate flows through each water storage tray layer by layer and overflows until it flows back to the water tank to achieve circulation treatment.

[0012] Furthermore, in the above technical solution, each layer of water storage trays can be arranged in a staggered manner, and an overflow port is provided on a recessed side of each layer of water storage trays.

[0013] Furthermore, in the above technical solution, the side wall of the water storage tray where the overflow port is arranged can be inclined at an acute angle.

[0014] Furthermore, in the above technical solution, a plurality of ultraviolet LED light sources are evenly distributed on the bars of a grille light panel, and the grille light panel is arranged at the lower part of each layer of the water storage tray to irradiate the foam ceramic plate or foam ceramic ball of the lower layer.

[0015] Furthermore, in the above technical solution, the grille light panel can be fixed to the lower part of the water storage tray by angle iron.

[0016] Furthermore, in the above technical solution, the water storage tray can be fixed on the frame of the circulation treatment device by means of channel steel and angle iron.

[0017] Furthermore, in the above technical solution, the ultraviolet LED light source can be a UVA band LED light source.

[0018] Furthermore, in the above technical solution, the bottom surface of the water storage tray can be tilted along the flow direction of the garbage leachate.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1) The photocatalytic unit of the utility model can effectively degrade the concentration of organic matter in the landfill leachate, and is very efficient in degrading COD and BOD in the liquid;

[0021] 2) The water storage trays are layered and staggered horizontally, which can maximize the liquid flow time and make the catalytic reaction more effective;

[0022] 3) The overflow port and the bottom of the water storage tray are tilted to make the water flow smoother;

[0023] 4) The side wall where the overflow port is located is tilted at an acute angle, which can effectively prevent the overflowing liquid from flowing to the grille light board at the bottom of the water storage tray and causing a short circuit.

[0024] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, and at the same time to make the above and other purposes, technical features and advantages of the utility model easier to understand, one or more preferred embodiments are listed below and described in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a stereoscopic diagram of the garbage leachate circulation treatment device of the utility model.

[0026] Figure 2 It is a side view of the garbage leachate circulation treatment device of the utility model.

[0027] Figure 3 It is a three-dimensional diagram of a water storage pan in a garbage leachate circulation treatment device of the utility model (showing two layers of water storage pans).

[0028] Figure 4 It is a decomposition schematic diagram of a photocatalytic unit in the garbage leachate circulation treatment device of the utility model.

[0029] Figure 5 It is a schematic diagram of the leachate flow direction of the garbage leachate circulation treatment device of the utility model.

[0030] Description of main reference numerals:

[0031] 1-garbage leachate circulation treatment device, 10-channel steel, 11-water tank, 12-water pipe, 13-water pump, 14-water storage tray, 140-inclined side wall, 141-overflow port, 142-angle iron, 15-foam ceramic plate, 16-grid light board. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0033] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0034] In this document, for the convenience of description, spatial relative terms such as "below", "below", "down", "above", "above", "upper", etc. may be used to describe the relationship between one element or feature and another element or feature in the accompanying drawings. It should be understood that the spatial relative terms are intended to include different orientations of the object in use or operation in addition to the orientation depicted in the figure. For example, if the object in the figure is turned over, the element described as being "below" or "below" other elements or features will be oriented "above" the element or feature. Therefore, the exemplary term "below" can include both below and above. Objects may also have other orientations (rotated 90 degrees or other orientations) and the spatial relative terms used in this document should be interpreted accordingly.

[0035] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable.

[0036] like Figure 1 As shown, the garbage leachate circulation treatment device 1 of the utility model is a frame structure as a whole, and a water tank 11 is provided at the bottom of the frame structure. The water tank 11 is used to contain the garbage leachate to be purified. The garbage leachate is pumped through a water pump 13 (see Figure 5) is extracted along the water pipe 12 to the top of the frame structure, and after being catalytically treated layer by layer by the photocatalytic unit, it finally returns to the water tank 11, thereby realizing the catalytic purification water cycle of the garbage leachate. The photocatalytic unit of the utility model is arranged in the pipeline of the water cycle, that is, the garbage leachate pumped to the top flows through the photocatalytic unit and then returns to the water tank 11. The photocatalytic unit includes a foam ceramic carrier loaded with photocatalytically active components and an ultraviolet LED light source (not shown in the figure). Preferably, but not restrictively, the foam ceramic carrier can use a foam ceramic plate 15 (illustrated in the utility model) or a foam ceramic ball (not shown in the figure). The material properties of the two are exactly the same, but the structural form is different. The foam ceramic carrier is arranged in the water storage tray 14. If a foam ceramic plate 15 is used, a whole plate can be placed in the water storage tray 14; if foam ceramic balls are used, multiple foam ceramic balls can be stacked in the water storage tray 14. The pumped garbage leachate continuously flows into the water storage tray 14 , and the foam ceramic carrier immersed in the garbage leachate is continuously irradiated by the ultraviolet LED light source, thereby catalytically purifying the garbage leachate in the water storage tray 14 .

[0037] Further Figure 1-3 As shown, in the garbage leachate circulation treatment device of the utility model, the water storage tray 14 includes multiple layers and is arranged in layers, and the garbage leachate can flow through each layer of the water storage tray 14, so that the catalytic purification is more thorough and the purification effect is more obvious. The garbage leachate pumped by the water pump 12 enters the uppermost water storage tray 14, and when the liquid level of the water storage tray of this layer rises to the overflow port 141, the garbage leachate overflows to the lower water storage tray, so that the garbage leachate can flow through each layer of the water storage tray 14 layer by layer and overflow until it flows back to the water tank 11 to achieve circulation treatment.

[0038] Further Figure 3 , 5 As shown, each layer of water storage trays 14 is staggered (see Figure 5 ), that is, the top water storage pan is arranged on the right side of the frame structure, the second water storage pan is arranged on the left side of the frame structure, the third water storage pan is arranged on the right side of the frame structure again, and so on. The overflow port 141 is arranged on the concave side of each layer of water storage pan, that is, the overflow port of the top water storage pan is arranged on the Figure 5 On the left side of the figure, the overflow port of the second water storage tray is set at Figure 5The right side of the figure can ensure that the garbage leachate pumped to the top can flow in the direction of the arrow in the figure, making the catalytic purification more complete. Since the ultraviolet LED light source is fixed at the bottom of the water storage tray 14 to irradiate the foam ceramic plate 15 in the lower layer soaked in the garbage leachate, there is no need to set a foam ceramic plate in the uppermost water storage tray 14. The uppermost water storage tray is only used to drain, mix and distribute the water. The ultraviolet LED light source is set on the grille light board 16, that is, multiple ultraviolet LED light sources are evenly distributed on the bars of the grille light board. The grille light board 16 is set at the bottom of each layer of the water storage tray 14 to irradiate the foam ceramic plate 15 in the lower layer. By fixing the grille light board 16 at the bottom of the water storage tray 14, the water flow can assist the grille light board in dissipating the heat of the ultraviolet LED light source.

[0039] Further Figure 3 As shown, a foam ceramic plate 15 is provided on each layer of water storage tray below the second layer from top to bottom, and the overflow port 141 of each layer of water storage tray is used for drainage. The overflow port gap is lower than that of the other three side walls, which can effectively prevent the garbage leachate from flowing out from the other three side walls. If it is necessary to increase the processing capacity of the catalytic purification, it can be achieved by replacing a large-flow liquid pump. If the pump flow rate becomes larger, when the water storage tray 14 is placed horizontally, the overflow port 141 of the water storage tray will appear due to the surface tension of the water body, and the outlet liquid level will be significantly higher than the outlet gap, and even close to the height of the other three side walls. At this time, the horizontal slope of each layer of the water storage tray can be slightly adjusted to lower the overflow port position and raise the position of the water inlet side of the water storage tray. By additionally increasing the inclination of the water storage tray, the overflow port can make the water discharge smoother, avoiding the overall overflow phenomenon. At the same time, it can also increase the flow rate of the garbage leachate on the surface of the foam ceramic plate and improve the circulation efficiency. Preferably, but not restrictively, as Figure 5 As shown, the side of the water storage pan where the overflow port 141 is provided is tilted at an acute angle, which can effectively prevent the overflowing liquid from flowing to the grille light plate 16 at the bottom of the water storage pan 14 .

[0040] Further Figure 3-5 As shown, in order to make the water storage pan and the grille light plate fixed more firmly, the water storage pan 14 is fixed to the frame of the circulation treatment device of the utility model through the channel steel 10 and the angle iron 142. The grille light plate 16 is fixed to the lower part of the water storage pan 14 through the angle iron 142.

[0041] In one or more exemplary embodiments of the present invention, the ultraviolet LED light source is preferably in the UVA band, and more preferably, the wavelength of the ultraviolet LED light source is 365nm. The use of an ultraviolet LED light source in the UVA band can improve photoelectric efficiency and reduce energy loss. The wavelength of ultraviolet light emitted by the ultraviolet LED light source is 280 to 390nm, which can be a single wavelength or a mixed wavelength.

[0042] Furthermore, the photocatalytic foam ceramic plate 15 or foam ceramic ball in the photocatalytic unit adopts a foam alumina-based carrier as an open-cell foam structure, and the photocatalyst is a foam alumina-based carrier loaded with TiO2 photocatalyst. In the photocatalyst, TiO2 crystals are embedded and dispersed on the outer surface of the photocatalyst, and among the TiO2 crystals on the outer surface of the photocatalyst, the TiO2 crystals with a particle size of 5 to 50 μm account for more than 70%.

[0043] The garbage leachate circulation treatment device of the utility model can effectively degrade the concentration of organic matter in the leachate by a photocatalytic method, and has the advantages of stable performance, mild reaction conditions, no secondary pollution, low cost, high efficiency, etc. It is a very efficient treatment method for degrading COD and BOD in garbage leachate and has good application prospects.

[0044] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments should fall within the scope of protection of the utility model.

Claims

1. A garbage leachate circulation treatment device, characterized in that: include: A water tank, which is used to contain the landfill leachate and realize water circulation through a water pump and a pipeline; A photocatalytic unit is arranged in the water circulation pipeline; The photocatalytic unit comprises a foam ceramic carrier loaded with photocatalytic active components and an ultraviolet LED light source. The foam ceramic carrier is arranged in a water storage tray. The foam ceramic carrier immersed in garbage leachate is irradiated by the ultraviolet LED light source for purification.

2. The garbage leachate circulation treatment device according to claim 1, characterized in that: The foam ceramic carrier is a foam ceramic plate or a foam ceramic ball.

3. The garbage leachate circulation treatment device according to claim 2 is characterized in that: There are multiple water storage pans arranged in layers. The garbage leachate pumped by the water pump enters the uppermost water storage pan and overflows to the lower water storage pans. The garbage leachate flows through each of the water storage pans layer by layer and overflows until it flows back to the water tank to achieve circulation treatment.

4. The garbage leachate circulation treatment device according to claim 3 is characterized in that: The water storage pans of each layer are arranged in a staggered manner, and an overflow port is arranged on a recessed side of the water storage pan of each layer.

5. The garbage leachate circulation treatment device according to claim 4, characterized in that: The side of the water storage tray where the overflow port is arranged is inclined at an acute angle.

6. The garbage leachate circulation treatment device according to claim 3 is characterized in that: A plurality of ultraviolet LED light sources are evenly distributed on the bars of a grille light panel, and the grille light panel is arranged at the lower part of each layer of the water storage tray to irradiate the foam ceramic panels or foam ceramic balls at the lower layer.

7. The garbage leachate circulation treatment device according to claim 6, characterized in that: The grille light panel is fixed to the lower part of the water storage tray through angle irons.

8. The garbage leachate circulation treatment device according to claim 3, characterized in that: The water storage tray is fixed on the frame of the circulation treatment device through channel steel and angle iron.

9. The garbage leachate circulation treatment device according to claim 1, characterized in that: The ultraviolet LED light source is a UVA band LED light source.

10. The garbage leachate circulation treatment device according to claim 1, characterized in that: The bottom surface of the water storage tray is inclined along the flow direction of the garbage leachate.

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