A methane and odor emission prevention device for a drainage inspection well

Abstract

The utility model relates to a kind of drainage inspection well embedded methane and stench emission prevention device, by composite air-permeable membrane, cylindrical shell, biological filler layer, porous bottom plate, fixed ring, water seal box, downspout composition;The cylindrical shell upper opening and lay a layer of composite air-permeable membrane, the utility model relates to environmental protection technical field.This kind of drainage inspection well embedded methane and stench emission prevention device, can be installed in existing street drainage inspection well or community septic tank inspection well, can effectively prevent underground drainage pipeline and methane and stench in septic tank emit to ground air environment, improve urban street and air environment quality in community;Prevent methane release to atmospheric environment in drainage pipe system and produce greenhouse gas effect.It can also effectively prevent virus in drainage system with aerosol diffusion to ground air environment, and it has important significance to guarantee public safety.

Description

Technical Field

[0001] This utility model relates to an embedded device for preventing the emission of methane and odor from drainage inspection wells, specifically belonging to the field of environmental protection. It can improve the air quality of urban streets and prevent viruses from spreading from the sewer drainage system and septic tank system to the ground air, and prevent the emission of methane carbon sources from the drainage pipeline system into the atmosphere, thus preventing the greenhouse gas effect. Background Technology

[0002] Currently, urban drainage pipes are basically laid along streets and roads, forming a vast system that requires drainage inspection wells at regular intervals. Under anaerobic or anoxic conditions, sewage and sediment in underground drainage pipes release methane and foul odors, overflowing from inspection wells and septic tank openings into the air, affecting pedestrians and residents. Methane release from drainage systems is an easily overlooked, hidden source of carbon emissions; statistics show it accounts for approximately half of the carbon emissions from wastewater treatment plants, a significant amount. Furthermore, sewage flowing through drop manholes and other drainage systems causes water disturbance, easily generating aerosols. Viruses in the sewage can be carried by these aerosols, overflowing from inspection wells and spreading into the atmosphere, posing a significant threat to public safety.

[0003] Urban sewage systems are vast, with underground drainage pipes crisscrossing streets and alleys. In some older streets, the underground drainage pipes and manholes accumulate sediment, resulting in more severe odors, especially during hot summers and rainy days. This odor concentration is high, causing olfactory irritation to pedestrians and seriously impacting urban air quality. Therefore, embedding a device to prevent the emission of methane, odors, and viruses into existing drainage manholes or septic tank manholes can reduce carbon emissions, improve street air quality, and enhance public safety. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an embedded device for preventing the emission of methane and odors from drainage inspection wells. This prevents odors from drainage pipes from escaping from the sewage inspection wells into the street air, thus protecting the health of pedestrians and improving urban air hygiene. It also prevents the emission of methane carbon sources from the drainage system into the atmosphere, contributing to the greenhouse gas effect. Furthermore, this invention prevents infectious viruses from the drainage system from spreading from the sewage inspection wells into the atmosphere, enhancing public health and safety. The device is embedded within the drainage inspection well, without affecting the existing structure of drainage inspection wells and septic tank covers, eliminating the need to replace existing covers, minimizing traffic disruption, and offering quick and convenient installation.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an embedded device for preventing the emission of methane and odor from a drainage inspection well, comprising a composite breathable membrane, a cylindrical shell, a biological filler layer, a porous base plate, a fixing ring, a water seal box, and a downpipe; the upper part of the cylindrical shell is open and covered with a layer of composite breathable membrane, the lower part of the cylindrical shell is a porous base plate, on which a biological filler layer is laid, the cylindrical shell is placed on an annular fixing ring, the annular fixing ring is fixed to the well wall, and a water seal box and a downpipe are set in the middle of the cylindrical shell.

[0006] As a further embodiment of this utility model: the device is installed on the well wall below the cover of an existing street drainage inspection well, rainwater inspection well, or community septic tank inspection well.

[0007] As a further embodiment of this utility model, the inspection well is an existing brick-concrete structure, reinforced concrete structure, or prefabricated plastic inspection well.

[0008] As a further embodiment of this utility model: the cylindrical shell is placed on a fixing ring, and the fixing ring is pre-fixed to the well wall.

[0009] As a further embodiment of this invention: the composite breathable membrane is a multi-microporous hydrophobic breathable membrane that only allows small molecular weight gases such as water vapor and air to pass through, while blocking large odor molecules such as hydrogen sulfide, ammonia, and methanethiol, as well as viruses, from passing through; the odor components intercepted by the composite breathable membrane dissolve in water droplets below the membrane, drip into the biological filler layer, and are decomposed by deodorizing microorganisms in the biological filler layer.

[0010] As a further embodiment of this utility model: the composite breathable membrane is made of PTFE material; to increase the strength of the composite breathable membrane, a hydrophobic breathable membrane can be combined with a mesh structure material such as non-woven fabric.

[0011] As a further embodiment of this utility model: the cylindrical shell has a perforated bottom plate, and the upper opening can also be covered with a perforated cover plate; the shape of the cylindrical shell can be circular, square, rectangular or other shapes depending on the shape of the drainage inspection well; the holes on the perforated bottom plate can be circular, rhomboid or other shapes; the cylindrical shell can be made of plastic or steel or other materials.

[0012] As a further embodiment of this invention: a biological packing layer is laid inside the cylindrical shell and on the porous bottom plate, on which deodorizing microorganisms attach and multiply, thereby decomposing odor components through microorganisms.

[0013] As a further aspect of this utility model: the material of the biological filler layer can be organic or inorganic, and its form can be granular, fiber bundle, or fiber cluster. It can be sand, volcanic rock, bamboo charcoal, activated carbon, porous plastic rings, biomass fillers, etc. The filler in the biological filler layer can be one or more of the above fillers combined. Biological deodorizing bacteria are sprayed on the biological filler layer. The deodorizing bacteria use methane, odor components, and dripping rainwater as nutrients to reproduce, continuously ensuring the deodorizing effect.

[0014] As a further embodiment of this utility model: a water seal box and a downpipe are provided inside the cylindrical shell. Rainwater flowing into the well from the ground flows into the water seal box through the downpipe and is stored and evaporated in the water seal box to provide moisture for the reproduction of microorganisms in the biological packing layer; there can be one or more water seal boxes and downpipes.

[0015] Compared with existing technologies, this invention has the following advantages: This device can be installed in existing urban street drainage inspection wells and residential septic tank inspection wells, effectively preventing methane and odors from spreading from underground drainage pipes into the atmosphere, thus reducing urban street air quality and carbon emissions. It can also effectively prevent viruses from spreading from underground drainage pipes and residential septic tanks into the ground air environment via aerosols, which is of great significance for ensuring public safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] In the diagram: 1. Composite breathable membrane; 2. Cylindrical shell; 3. Cylindrical shell; 4. Porous base plate; 5. Fixing ring; 6. Water seal box; 7. Downpipe. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Please see Figure 1 This utility model provides the following technical solutions: Example 1

[0020] like Figure 1As shown, this utility model proposes an embedded device for preventing the emission of methane and odor from a drainage inspection well. The device consists of a composite breathable membrane 1, a cylindrical shell 2, a biological filler layer 3, a porous base plate 4, a fixing ring 5, a water seal box 6, and a downpipe 7. The device is installed inside the well wall below the drainage inspection well cover. The upper part of the cylindrical shell 2 is open and covered with a layer of composite breathable membrane 1. The lower part of the cylindrical shell 2 is a porous base plate 4, on which the biological filler layer 3 is laid. The cylindrical shell 2 is placed on an annular fixing ring 5, which is fixed to the well wall. A water seal box 6 and a downpipe 7 are located in the middle of the cylindrical shell 2.

[0021] When methane and odorous components from underground drainage pipes or septic tanks diffuse through inspection wells, they first pass through the biological packing layer 3 within the deodorization device, where they are mostly decomposed into water and carbon dioxide by the deodorizing microorganisms on the biological packing layer 3. Undecomposed large-molecule odorous components and viruses are blocked by the upper composite breathable membrane 1 and dissolved in water droplets below the membrane, which then drip into the biological packing layer 3, where they are further decomposed by the deodorizing microorganisms. Rainwater flowing into the well flows through the downpipe 7 into the water seal box 6, where it is stored and evaporated, providing moisture for the microorganisms in the biological packing layer 3. The dripping rainwater, containing organic matter, also provides nutrients for the deodorizing microorganisms. To ensure deodorization effectiveness, deodorizing microbial inoculants can be sprayed onto the biological packing layer 3 beforehand. Example 2

[0022] In another embodiment, the cylindrical shell 2 is circular, suitable for circular inspection wells. The porous base plate 4 has circular holes, the biological filler layer 3 uses volcanic rock particles, and the composite breathable membrane 1 is made of PTFE material combined with non-woven fabric to increase strength. One water seal box 6 and one downpipe 7 are each provided. The fixing ring 5 is fixed to the well wall with expansion bolts to ensure the stability of the device. This embodiment is suitable for street drainage inspection wells and can effectively block odors such as methane and hydrogen sulfide after installation. Example 3

[0023] In another embodiment, the cylindrical shell 2 is rectangular in shape, suitable for square inspection wells. The porous bottom plate 4 has rhomboid holes, the biological packing layer 3 uses a mixture of bamboo charcoal, activated carbon, and biomass packing, and the composite breathable membrane 1 is a pure PTFE membrane. Two water seal boxes 6 and two downpipes 7 are provided to increase the water seal effect and rainwater collection capacity. This embodiment is suitable for inspection wells in septic tanks in residential areas, and can efficiently decompose odorous components such as ammonia and methanethiol, while preventing the spread of viruses. Example 4

[0024] In another embodiment, the biological packing layer 3 uses a composite packing of porous plastic rings and sand, pre-sprayed with deodorizing microbial inoculants. The cylindrical shell 2 is made of stainless steel, and the porous bottom plate 4 is made of perforated steel plate. The composite breathable membrane 1 adopts a multi-layer PTFE composite structure to enhance durability. The water seal box 6 has a built-in float valve to automatically control the water level and ensure the moisture supply for the microorganisms. This embodiment is suitable for high-load drainage inspection wells and operates stably over a long period of time.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A device for preventing the emission of methane and odor from a drainage inspection well, characterized in that: It consists of a composite breathable membrane (1), a cylindrical shell (2), a biological filler layer (3), a porous bottom plate (4), a fixing ring (5), a water seal box (6), and a downpipe (7); the cylindrical shell (2) has an opening at the top and is covered with a layer of composite breathable membrane (1), the bottom of the cylindrical shell (2) is a porous bottom plate (4), a biological filler layer (3) is laid on the porous bottom plate (4), the cylindrical shell (2) is placed on the annular fixing ring (5), the annular fixing ring (5) is fixed to the well wall, and a water seal box (6) and a downpipe (7) are set in the middle of the cylindrical shell (2).

2. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The device is installed on the wall below the cover of an existing street drainage inspection well, rainwater inspection well, or community septic tank inspection well.

3. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The inspection well is an existing brick-concrete structure, reinforced concrete structure, or prefabricated plastic inspection well.

4. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The cylindrical shell (2) is placed on the fixing ring (5), which is fixed to the well wall beforehand.

5. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The composite breathable membrane (1) is a multi-microporous hydrophobic breathable membrane.

6. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The composite breathable membrane (1) is made of PTFE material or a composite weaving of hydrophobic breathable membrane and non-woven mesh structure material.

7. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The cylindrical shell (2) has a perforated bottom plate (4), and the cylindrical shell (2) is circular, square or rectangular in shape; the holes on the perforated bottom plate (4) are circular or rhomboid in shape; the cylindrical shell (2) is made of plastic or steel.

8. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: A biological filler layer (3) is laid inside the cylindrical shell (2) and on the porous bottom plate (4). Deodorizing microorganisms are attached to and reproduce on the biological filler layer (3), and the odor components are decomposed by the microorganisms.

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