Biogas slurry treatment irrigation system

Abstract

The utility model relates to a biogas slurry treatment and irrigation system which comprises a solid-liquid separator, a biogas slurry settling tank, a filtering and oxidizing tank, a liquid storage tank and an irrigation device which are sequentially connected through a pipeline, the interior of the filtering and oxidizing tank is divided into three areas through two layers of mesh plates, the three areas are an aeration area, a filtering and oxidizing area and a liquid outlet area in sequence from bottom to top, the filtering and oxidizing area is filled with filler composed of volcanic rock and activated carbon, and an aeration disc is arranged in the aeration area and connected with an ozone supply pipe. The biogas slurry treatment and irrigation system is novel in structure, reasonable in design, convenient and practical, after solid-liquid separation, sedimentation, filtration, catalytic oxidation and other treatments are conducted on biogas slurry, the biogas slurry is directly used for farmland irrigation through the irrigation device, and the utilization efficiency of the fertilizer efficiency of the biogas slurry is high; impurities and harmful substances in the biogas slurry can be effectively removed, influences on crop growth are avoided, meanwhile, the blocking situation of an irrigation device is reduced, reasonable recycling of the biogas slurry is achieved, and water quality pollution and environmental pollution are reduced.

Description

Technical Field

[0001] This utility model relates to the field of irrigation technology, and in particular to a biogas slurry treatment irrigation system. Background Technology

[0002] To achieve the harmless treatment and energy utilization of livestock manure, many livestock farms have built biogas projects, generating biogas through anaerobic treatment and recycling it. While achieving certain benefits, this also produces a large amount of byproducts, namely biogas slurry. Organic waste, especially livestock manure, is rich in heavy metals and antibiotics, which are difficult to eliminate during anaerobic fermentation, leaving residues in the biogas slurry after anaerobic digestion. Most farms discharge biogas slurry directly without treatment, exacerbating water and environmental pollution. If biogas slurry is used as liquid organic fertilizer, the presence of heavy metals and antibiotics also affects its safe utilization. Furthermore, the organic suspended solids and microorganisms in the biogas slurry can easily breed algae and bacterial clusters in pipelines, causing blockages in pipelines and irrigation devices. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a biogas slurry treatment irrigation system that enables the rational recycling and utilization of biogas slurry, reduces water and environmental pollution, and achieves high biogas slurry utilization efficiency.

[0004] This utility model is implemented using the following scheme: a biogas slurry treatment irrigation system, comprising a solid-liquid separator, a biogas slurry sedimentation tank, a filtration oxidation tank, a storage tank, and an irrigation device connected in sequence by pipelines; the filtration oxidation tank is divided into three areas by two layers of perforated plates, which are, from bottom to top, an aeration zone, a filtration oxidation zone, and a liquid outlet zone; the filtration oxidation zone is filled with a filler material composed of volcanic rock and activated carbon; the aeration zone is equipped with an aeration disc, which is connected to an ozone supply pipe.

[0005] Furthermore, the biogas slurry sedimentation tank is equipped with an inlet zone, a sedimentation zone, an inclined plate filtration zone, and a clear water zone. A first pipeline connects the clear water zone of the biogas slurry sedimentation tank and the aeration zone of the filtration oxidation tank.

[0006] Furthermore, the bottom of the biogas slurry sedimentation tank is inverted conical, a second pipeline is connected between the water inlet area of ​​the biogas slurry sedimentation tank and the water outlet of the solid-liquid separator, a biogas residue return pipe is connected between the bottom of the biogas slurry sedimentation tank and the feed inlet of the solid-liquid separator, and a sludge discharge pump is installed on the biogas residue return pipe.

[0007] Furthermore, a third pipeline connects the liquid storage tank and the liquid outlet area of ​​the filtration oxidation tank.

[0008] Furthermore, the top of the filtration oxidation tank is connected to an exhaust pipe, and an exhaust pump, a first valve, and an exhaust gas treatment device are connected to the exhaust pipe.

[0009] Further, the pipeline between the exhaust pump and the first valve on the exhaust pipe is connected with an ozone circulating pipe, the ozone supply pipe is provided with a second valve, and the ozone circulating pipe is provided with a third valve.

[0010] Further, the irrigation device comprises an irrigation main pipe connected with the liquid storage pool at one end and connected with an irrigation branch pipe at the other end, the irrigation branch pipe is connected with a plurality of irrigation pipes, and a plurality of drip irrigation heads are arranged on the irrigation pipes at intervals.

[0011] Further, the irrigation main pipe is provided with a delivery pump and a filter.

[0012] Further, the irrigation main pipe is connected with a pressure gauge at one end of the irrigation branch pipe, and each irrigation pipe is provided with a fourth valve at one end of the irrigation branch pipe.

[0013] Further, the liquid storage pool is connected with a tap water supplementing pipe at the top.

[0014] Compared with the prior art, the biogas slurry treatment and irrigation system has the following beneficial effects: the biogas slurry treatment and irrigation system has novel structure, reasonable design, convenience and practicality, after the biogas slurry is treated by solid-liquid separation, precipitation, filtration and catalytic oxidation, organic state nitrogen and phosphorus are converted into inorganic state nitrogen and phosphorus (such as nitrate nitrogen and phosphate), the biogas slurry is directly used for farmland irrigation by using the irrigation device, the utilization efficiency of the biogas slurry fertilizer effect is high, impurities and harmful substances (such as suspended solids, antibiotics and heavy metals) in the biogas slurry can be effectively removed, the influence on the soil and crop growth is avoided, the irrigation device clogging condition is reduced, the biogas slurry is reasonably recycled, water pollution and environmental pollution are reduced, and the harmless and resource utilization of livestock and poultry manure are realized.

[0015] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by specific examples and related drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic view of an embodiment of the utility model;

[0017] Explanation of the numbers in the diagram: 100-Solid-Liquid Separator, 200-Sludge Sedimentation Tank, 210-Inlet Zone, 220-Sedimentation Zone, 230-Inclined Plate Filter Zone, 240-Clear Water Zone, 300-Filter Oxidation Tank, 310-Mesh Plate, 320-Catching Material, 330-Aeration Disc, 400-Storage Tank, 500-Irrigation Device, 510-Irrigation Main Pipe, 520-Irrigation Branch Pipe, 530-Irrigation Capillary Pipe, 531-Drip Irrigation Head, 532-Fourth Valve, 540-Transfer Pump, 550-Filter, 560-Pressure Gauge, 600-Ozone Supply Pipe, 700-Sludge Return Pipe, 800-Exhaust Pipe, 810-Exhaust Pump, 820-Tail Gas Treatment Device, 830-Ozone Circulation Pipe. Detailed Implementation

[0018] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] like Figure 1 As shown, a biogas slurry treatment irrigation system includes a solid-liquid separator 100, a biogas slurry sedimentation tank 200, a filtration oxidation tank 300, a storage tank 400, and an irrigation device 500 connected in sequence by pipelines. The filtration oxidation tank 300 is internally divided into three areas by two layers of perforated plates 310, namely, an aeration zone, a filtration oxidation zone, and a liquid outlet zone, from bottom to top. The filtration oxidation zone is filled with a filler material 320 composed of volcanic rock and activated carbon. The aeration zone is equipped with an aeration disc 330, which is connected to an ozone supply pipe 600. This invention treats biogas slurry through solid-liquid separation, sedimentation, filtration, and catalytic oxidation, stores it in the storage tank, and uses the irrigation device 500 to directly irrigate farmland with the biogas slurry. This effectively removes impurities and harmful substances from the biogas slurry, avoiding negative impacts on crop growth (including crop diseases and seedling burn), while also reducing clogging of the irrigation device, achieving reasonable recycling of biogas slurry, and reducing water and environmental pollution.

[0021] The activated carbon can adsorb heavy metals (such as Cu, Zn, Pb, As, Hg and Cr) in the biogas slurry; the volcanic rock and ozone can catalyze and oxidize the antibiotics in the biogas slurry; after the filtration and oxidation treatment, the problems of high concentration of suspended solids, bad smell, heavy metal and antibiotic pollution of the biogas slurry are effectively solved.

[0022] In the embodiment, the mixing ratio of the volcanic rock and the activated carbon in the filling material is 2:1-3:1.

[0023] In the embodiment, the biogas slurry settling tank 200 is provided with a water inlet area 210, a settling area 220, an inclined plate filtration area 230 and a clear water area 240; a first pipeline is connected between the clear water area of the biogas slurry settling tank and the aeration area of the filtration and oxidation tank; the supernatant of the clear water area is transported to the aeration area of the filtration and oxidation tank through the first pipeline, and a water pump can be arranged on the first pipeline.

[0024] In the embodiment, the lower part of the bottom of the biogas slurry settling tank is in an inverted conical shape; a second pipeline is connected between the water inlet area of the biogas slurry settling tank and the water outlet of the solid-liquid separator; a biogas residue backflow pipe 700 is connected between the bottom of the biogas slurry settling tank and the feed inlet of the solid-liquid separator; a sludge discharge pump is arranged on the biogas residue backflow pipe; the biogas residue in the settling tank is transported back to the solid-liquid separator through the biogas residue backflow pipe to participate in the solid-liquid separation again; and the solid waste obtained by the solid-liquid separator can be used as solid organic fertilizer.

[0025] In the embodiment, a third pipeline is connected between the liquid storage pool and the liquid outlet area of the filtration and oxidation tank.

[0026] In the embodiment, an exhaust pipe 800 is connected to the top of the filtration and oxidation tank; an exhaust pump 810, a first valve and a tail gas treatment device 820 are connected to the exhaust pipe. The tail gas treatment device is a product of prior art and can be directly purchased; it is used for exhausting after ozone treatment and its structure and principle are not described in detail.

[0027] In the embodiment, in order to make full use of the ozone, an ozone circulation pipe 830 is connected between the pipeline between the exhaust pump and the first valve of the exhaust pipe and the ozone gas supply pipe; a second valve is arranged on the ozone gas supply pipe; a third valve is arranged on the ozone circulation pipe; the ozone circulation pipe can realize the circulation of the ozone in the filtration and oxidation tank, thereby improving the utilization rate of the ozone and the mineralization rate of the antibiotics.

[0028] In the embodiment, the irrigation device 500 comprises an irrigation main pipe 510 connected at one end to the liquid storage pool and at the other end to an irrigation branch pipe 520; a plurality of irrigation lateral pipes 530 are connected to the irrigation branch pipe; a plurality of drip irrigation heads 531 are arranged at intervals on the irrigation lateral pipes; and the drip irrigation method is used for irrigation, thereby saving resources and reducing waste.

[0029] In the embodiment, the irrigation main pipe is provided with a delivery pump 540 and a filter 550; the filter can be used to further filter the biogas slurry, so as to avoid blocking the pipeline or the drip irrigation head.

[0030] In the embodiment, in order to facilitate maintenance, the irrigation main pipe is connected with a pressure gauge 560 at the end of the irrigation branch pipe, and each irrigation pipe is provided with a fourth valve 532 at the end of the irrigation branch pipe.

[0031] In the embodiment, the liquid storage tank is connected with a tap water supplementing pipe at the top; by supplementing tap water into the liquid storage tank, the concentration of the biogas slurry can be adjusted, so as to avoid that the high concentration of the biogas slurry causes damage to crops.

[0032] Unless otherwise stated, if the above-mentioned any technical solution of the utility model discloses a numerical range, then the disclosed numerical range is the preferred numerical range, and any person skilled in the art should understand that the preferred numerical range is only one of the many implementable values with more obvious technical effect or representative value.

[0033] If the utility model discloses or involves mutually fixed connection parts or structural members, then, except otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, using bolt or screw connection), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutual fixed connection can also be replaced by an integral structure (for example, using casting process integral forming manufacturing), except obviously cannot adopt integral forming process.

[0034] In addition, the terms used to represent the position relationship or shape in the above-mentioned any technical solution of the utility model disclosed include the approximate, similar or close state or shape, except otherwise stated.

[0035] Any component provided by the utility model can be assembled by a plurality of individual components, or can be an individual component manufactured by integral forming process.

[0036] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application, and in accordance with the technical essence of the present application, still belong to the protection scope of the technical solution of the present application.

Claims

1. A biogas slurry treatment irrigation system, characterized by: The application relates to a biogas slurry treatment and irrigation device.

2. The biogas liquid treatment irrigation system according to claim 1, wherein: The biogas slurry settling tank is internally provided with a water inlet area, a settling area, an inclined plate filtering area and a clean water area, and a first pipeline is connected between the clean water area of the biogas slurry settling tank and the aeration area of the filter oxidation tank.

3. The biogas slurry treatment irrigation system according to claim 2, wherein: The bottom of the biogas slurry settling tank is in an inverted conical shape, a second pipeline is connected between the water inlet area of the biogas slurry settling tank and the water outlet of the solid-liquid separator, a sludge backflow pipe is connected between the bottom of the biogas slurry settling tank and the feeding port of the solid-liquid separator, and a sludge discharge pump is arranged on the sludge backflow pipe.

4. The biogas liquid treatment irrigation system of claim 1, wherein: A third pipeline is connected between the liquid outlet area of the filter oxidation tank and the liquid storage pool.

5. The biogas liquid treatment irrigation system of claim 1, wherein: An exhaust pipe is connected to the top of the filter oxidation tank, an exhaust pump, a first valve and a tail gas treatment device are connected to the exhaust pipe.

6. The biogas slurry treatment irrigation system according to claim 5, wherein: An ozone circulation pipe is connected between the pipeline between the exhaust pump and the first valve of the exhaust pipe and the ozone gas supply pipe, a second valve is arranged on the ozone gas supply pipe, and a third valve is arranged on the ozone circulation pipe.

7. The bioglycerol treatment irrigation system of claim 1, wherein: The irrigation device comprises an irrigation main pipe connected at one end to the liquid storage pool and at the other end to an irrigation branch pipe, a plurality of irrigation lateral pipes are connected to the irrigation branch pipe, and a plurality of drip irrigation heads are arranged at intervals on the irrigation lateral pipes.

8. The biogas slurry treatment irrigation system according to claim 7, wherein: A delivery pump and a filter are arranged on the irrigation main pipe.

9. The biogas slurry treatment irrigation system according to claim 8, wherein: A pressure gauge is arranged on the irrigation main pipe towards the one end of the irrigation branch pipe, and a fourth valve is arranged on each irrigation lateral pipe towards the one end of the irrigation branch pipe.

10. The bioglycerol treatment irrigation system of claim 1, wherein: A tap water supplementing pipe is connected to the top of the liquid storage pool.

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