A domestic sewage treatment device suitable for high-cold and arid area expressway

Abstract

The utility model provides a kind of domestic sewage treatment device suitable for high-cold arid region expressway, it is related to environmental protection equipment field. Including the device body of box structure, the sidewall of device body includes electric heat tracing layer, first insulating layer and second insulating layer in turn from inside to outside;The sidewall of device body is provided with air inlet, and multiple-channel filter structure is arranged at air inlet;Aerator, A / O pool and filter tank are arranged inside device body;Aerator is connected with the gas outlet of multiple-channel filter structure;A / O pool is connected with aerator by gas supply pipeline, and its inside is provided with biological membrane filler;Filter tank is communicated with A / O pool by drain pipeline or drain port, and multiple layers of filter layer are sequentially arranged in filter tank along water flow direction. The present application can significantly enhance extreme environmental adaptability, and improve water quality reuse rate and stability, with high anti-freezing and high efficient reuse performance.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment, and more specifically, to a domestic sewage treatment device suitable for highways in cold and arid regions. Background Technology

[0002] As my country's expressway network expands into high-altitude and arid regions, the treatment of domestic sewage generated by service areas, toll stations, and other facilities along the routes faces severe challenges. These regions are characterized by low average annual temperatures, deep permafrost, and annual evaporation rates far exceeding precipitation.

[0003] However, traditional wastewater treatment equipment is prone to freezing in Xinjiang's winters (below -20°C) and its components age faster in the summer due to high temperatures. Furthermore, in windy and sandy environments, aeration systems and pipelines are easily clogged, making it difficult for effluent to consistently meet greening / toilet flushing standards. Therefore, current highway wastewater treatment methods suffer from poor environmental adaptability and low wastewater reuse rates. Utility Model Content

[0004] The purpose of this invention is to provide a domestic sewage treatment device suitable for highways in cold and arid regions. It can significantly enhance adaptability to extreme environments, improve water reuse rate and stability, and has high antifreeze and heat preservation performance as well as high reuse efficiency.

[0005] The embodiments of this utility model are implemented as follows:

[0006] This application provides a domestic sewage treatment device suitable for highways in cold and arid regions, including a device body with a box structure. The side wall of the device body includes an electric heat tracing layer, a first insulation layer and a second insulation layer from the inside to the outside.

[0007] The device body has an air inlet on its side wall, and a multi-channel filtration structure is provided at the air inlet; the device body is equipped with an aerator, an A / O tank and a filter tank; the aerator is connected to the air outlet of the multi-channel filtration structure.

[0008] The A / O tank is connected to the aerator via an air supply pipeline, and its interior is equipped with biofilm packing material.

[0009] The filter tank is connected to the A / O tank through a drainage pipeline or drainage outlet, and the filter tank has multiple filter layers arranged sequentially along the water flow direction.

[0010] Furthermore, based on the aforementioned scheme, the first insulation layer is a polyurethane insulation material, and the second insulation layer is a double-layer hollow fiberglass plate.

[0011] Furthermore, based on the aforementioned scheme, the electric heat tracing layer is arranged in sections from top to bottom and each section is independently controlled, including an upper electric heat tracing cable, a middle electric heat tracing cable, and a lower electric heat tracing cable.

[0012] Furthermore, based on the aforementioned scheme, the multi-channel filtration structure includes a structural body, inside which are provided multiple parallel gas channels, each of which is provided with a filter element; each of the multiple parallel gas channels is provided with a chamber communicating with it at both ends, one of which is open and provided with a filter screen, and the other is provided with an air outlet.

[0013] Furthermore, based on the aforementioned scheme, the multi-layer filter layer sequentially includes a sand filter layer, an activated carbon layer, and a volcanic rock layer along the water flow direction.

[0014] Furthermore, based on the aforementioned scheme, it also includes a clear water tank, which is located behind the filter tank and connected to the filter tank through a drainage pipeline or drain outlet; a pump body is installed in the clear water tank, and the clear water tank is connected to an external water supply device through a return water pipeline.

[0015] Furthermore, based on the aforementioned scheme, the A / O tank, the filter tank, and the clear water tank are all made of fiberglass or PVDF.

[0016] Furthermore, based on the aforementioned scheme, the biofilm packing material is a rope-type suspended packing material, which is suspended inside the A / O tank.

[0017] Furthermore, based on the aforementioned scheme, a temperature sensor and a DO sensor are installed in the A / O tank; a pressure sensor is installed in the gas supply pipeline.

[0018] Furthermore, based on the aforementioned scheme, the A / O tank is connected to a sewage pipeline, and the sewage pipeline is equipped with an electric regulating valve and a flow meter.

[0019] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0020] This application utilizes a box-shaped device body with enclosed sides to provide initial insulation for the internal equipment, integrating all equipment into the main body for a unified wastewater treatment device that facilitates manufacturing, installation, and transportation. The device body's sidewalls are designed with a three-layer structure, consisting of an electric heating layer, a first insulation layer, and a second insulation layer from the inside out. The internal electric heating layer heats the internal components, while the two external insulation layers provide insulation, reducing heat loss. Air inlets with multi-channel filtration structures on the sidewalls increase the contact area between air and the internal filter elements, effectively reducing the clogging of the aeration system and pipelines caused by windblown sand and other impurities. An A / O tank and a filter are incorporated. The A / O tank contains biofilm packing material, providing a space for microorganisms in the wastewater to attach and grow, increasing wastewater treatment efficiency. Wastewater treated in the A / O tank flows to the filter, which has multiple filtration layers arranged along the water flow direction for further filtration and purification of the biologically treated wastewater, improving effluent quality. This application can significantly enhance adaptability to extreme environments, improve water reuse rate and stability, and has high antifreeze and heat preservation performance as well as high reuse performance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a domestic sewage treatment device applicable to highways in cold and arid regions according to an embodiment of this utility model;

[0023] Figure 2 This is a cross-sectional view of the multi-channel filter structure according to an embodiment of the present invention.

[0024] Icons: 1-device body, 11-electric heating layer, 12-first insulation layer, 13-second insulation layer, 14-air inlet, 2-multi-channel filtration structure, 21-air outlet, 22-gas channel, 23-filter element, 24-filter screen, 3-sewage pipeline, 31-flow meter, 32-electric regulating valve, 4-air supply pipeline, 5-return water pipeline, 6-A / O tank, 7-filter tank. Detailed Implementation

[0025] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0026] Please refer to Figures 1-2The diagram shows the overall structure of a domestic sewage treatment device suitable for highways in cold and arid regions.

[0027] This embodiment provides a domestic sewage treatment device suitable for highways in cold and arid regions, including a device body 1 with a box structure. The side wall of the device body 1 includes an electric heat tracing layer 11, a first insulation layer 12 and a second insulation layer 13 from the inside to the outside.

[0028] The side wall of the device body 1 is provided with an air inlet 14, and a multi-channel filtration structure 2 is provided at the air inlet 14; an aerator, an A / O tank 6 and a filter tank 7 are provided inside the device body 1; the aerator is connected to the air outlet 21 of the multi-channel filtration structure 2.

[0029] A / O tank 6 is connected to an aerator via air supply line 4, and its interior is equipped with biofilm packing material.

[0030] The filter tank 7 is connected to the A / O tank 6 through a drainage pipe or drain outlet. The filter tank 7 has multiple filter layers arranged sequentially along the water flow direction.

[0031] The following will further describe an exemplary embodiment of a domestic sewage treatment device suitable for highways in cold and arid regions.

[0032] In some embodiments, the device body 1 has a box-like structure with an openable door at one end, similar to a carriage structure. In this embodiment, a sealing strip is provided on the door frame or the edge of the door to seal the gap between the door and the device body 1, thereby maintaining the insulation effect. The side wall of the device body 1 includes, from the inside to the outside, an electric heat tracing layer 11, a first insulation layer 12, and a second insulation layer 13. The electric heat tracing layer 11 is used to electrically heat the internal facilities, ensuring that critical internal components and sewage do not freeze due to low temperatures. The two external insulation layers can insulate the device and reduce heat loss.

[0033] In a preferred embodiment, the aforementioned electric heat tracing layer 11 is arranged in sections from top to bottom, with each section being independently controlled, including an upper electric heat tracing tape, a middle electric heat tracing tape, and a lower electric heat tracing tape. Understandably, the electric heat tracing tapes in the upper, middle, and lower sections are all arranged in a ring on the inner wall of the device body 1 to provide comprehensive heating for the internal equipment.

[0034] It should be noted that the electric heating tapes for the three areas are all independent electric heating tapes with a power density of 15W / m. They are independently controlled by the control system and can be set to automatically start when the temperature is below 0℃ (the temperature is monitored in real time by a temperature sensor). Since the device has three installation methods—buried, above ground, and semi-above ground—and the temperature varies in different parts depending on the installation method, the zoned electric heating layer 11 can accurately heat different areas of the device, saving energy.

[0035] In a preferred embodiment, the first insulation layer 12 is made of polyurethane insulation material, specifically composed of a 10cm thick layer of polyurethane insulation material. The polyurethane insulation layer has excellent insulation performance, effectively reducing heat exchange between the device's interior and the external environment.

[0036] The second insulation layer 13 mentioned above is a double-layer hollow fiberglass plate with a thermal conductivity of ≤0.03W / (m·K). The double-layer hollow structure further enhances the insulation effect and reduces heat loss. At the same time, fiberglass has good corrosion resistance and is suitable for use in complex environments.

[0037] By setting up a three-layer anti-freeze structure, the polyurethane insulation layer (thermal conductivity 0.02W / (m·K)) combined with zoned electric heat tracing, the equipment can maintain an operating temperature of ≥5℃ in an environment of -30℃, solving the problem of freezing and shutdown of traditional equipment in winter (actual measurement data in Altay region of Xinjiang).

[0038] In some embodiments, the side wall of the device body 1 is provided with an air inlet 14, and a multi-channel filtration structure 2 is provided at the air inlet 14; an aerator, an A / O tank 6 and a filter tank 7 are provided inside the device body 1; the aerator is connected to the air outlet 21 of the multi-channel filtration structure 2.

[0039] In a preferred embodiment, the aforementioned multi-channel filtration structure 2 specifically includes a structural body, within which multiple parallel gas channels 22 are arranged, each containing a filter element 23. Each of the parallel gas channels 22 has a chamber communicating with it at both ends; one chamber is open and fitted with a filter screen 24, while the other chamber has an air outlet 21. The filter element 23 is used for air filtration, primarily filtering windblown sand in arid and cold regions. It can be a high-density sponge filter element 23, a bag filter element 23, etc. (PM10 filtration efficiency ≥95%). The multi-channel design increases the contact area between air and the filter element 23, effectively reducing the clogging cycle of the internal aeration system and pipelines caused by windblown sand and other impurities, and lowering the frequency of filter element 23 replacement. The filter screen 24 is a metal mesh structure, washable and reusable, with strong impact resistance. The filter cotton + metal mesh structure provides multiple filtration capabilities and strong resistance to windblown sand.

[0040] The above structure, obtained through actual testing, extends the blockage cycle of gas supply line 4 from 7 days to 30 days and reduces the replacement frequency of filter element 23 by 75%.

[0041] In some embodiments, the A / O tank 6 is connected to an aerator via an air supply line 4, and its interior is equipped with biofilm packing material. Specifically, the biofilm packing material is preferably a rope-type suspended packing material, which is suspended inside the A / O tank 6 by steel frames installed at the top and bottom of the tank. Rope-type elastic packing material has a large specific surface area, providing abundant space for microorganisms to attach and grow, thus increasing treatment efficiency.

[0042] As a preferred implementation method, the A / O tank is made of fiberglass or PVDF, both of which have strong corrosion resistance and can adapt to complex chemical substances in wastewater.

[0043] In some embodiments, the filter 7 is connected to the A / O tank 6 via a drainage pipe or outlet, and the filter 7 has multiple filter layers arranged sequentially along the water flow direction. It is understood that the A / O tank 6 and the filter 7 can be separated by a partition with a drainage outlet in the partition for connection, or they can be configured as two independent tanks connected by a drainage pipe to achieve secondary wastewater treatment. The multiple filter layers can further filter and purify the biologically treated wastewater, ensuring that the effluent quality meets the standards for landscaping / toilet flushing.

[0044] Specifically, the aforementioned multi-layered filtration system, along the water flow direction, includes a sand filter layer, an activated carbon layer, and a volcanic rock layer. The sand filter layer, using relatively coarse filter media such as quartz sand, has large pores and primarily intercepts larger suspended particles, impurities, and silt in the water flow, preventing them from clogging subsequent, finer filter media layers (especially the activated carbon layer). Activated carbon, with its large specific surface area and well-developed microporous structure, adsorbs dissolved organic matter, odors, color, residual chlorine, some heavy metal ions, pesticide residues, and other chemical pollutants in the water, improving its taste and odor. The volcanic rock layer primarily performs biological filtration. Its rough, porous surface and large specific surface area provide ample attachment and growth surface for beneficial microorganisms such as nitrifying bacteria. These microorganisms, through biological processes, convert toxic ammonia nitrogen and nitrite in the water into less toxic nitrates, which is crucial for stabilizing water quality.

[0045] In a preferred embodiment, the above-mentioned device further includes a clear water tank, which is located behind the filter tank 7 and connected to the filter tank 7 via a drainage pipe or drain outlet. A pump is installed inside the clear water tank, and the clear water tank is connected to an external water supply device via a return water pipe 5. This allows the filtered water to be stored in the clear water tank, and the pump to deliver the water to the water supply device. An ultraviolet disinfection facility can be installed on the return water pipe 5 to disinfect the water before use, ensuring water safety.

[0046] In a preferred implementation, the A / O tank 6 is equipped with a temperature sensor and a DO sensor; the air supply line 4 is equipped with a pressure sensor. The temperature sensor in the O tank monitors the minimum activity temperature of microorganisms in the aeration tank. The DO sensor in the O tank monitors whether the dissolved oxygen is normal and meets the aerobic requirements of the microorganisms. The pressure sensor in the air supply line 4 monitors whether the aeration pressure is stable. The sensors collect various parameters during the device's operation in real time and transmit the data to an IoT monitoring platform via a 5G / BeiDou dual-mode communication module. This platform supports remote control via a SCADA system, allowing staff to monitor and operate the device in real time through a remote terminal.

[0047] In a preferred embodiment, the A / O tank 6 is connected to the sewage pipeline 3, which is equipped with an electric regulating valve 32 and a flow meter 31. The sewage pipeline 3 is the inlet pipeline, which can be connected to an external bar screen and equalization tank. The flow meter 31 is installed on the system inlet pipeline to monitor whether the system inflow meets design requirements and whether it is at full load. The electric regulating valve 32 controls the flow rate of the inlet pipeline to meet internal sewage treatment requirements.

[0048] As a preferred implementation, a solar panel can be installed on the exterior of the device body 1 to power the device using solar energy, thus saving energy consumption. Specifically, a 1kW solar panel and a 5kWh energy storage system can be configured. The solar panel converts solar energy into electrical energy, providing partial power support for the device. The energy storage system is used to store excess electrical energy and power the device when solar energy is insufficient or at night, achieving efficient energy utilization.

[0049] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0050] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A domestic sewage treatment device suitable for highways in cold and arid regions, characterized in that, The device body has a box-like structure, and the sidewalls of the device body include, from the inside to the outside, an electric heat tracing layer, a first heat insulation layer and a second heat insulation layer. The device body has an air inlet on its side wall, and a multi-channel filtration structure is provided at the air inlet; the device body is equipped with an aerator, an A / O tank and a filter tank; the aerator is connected to the air outlet of the multi-channel filtration structure. The A / O tank is connected to the aerator via an air supply pipeline, and its interior is equipped with biofilm packing material. The filter tank is connected to the A / O tank through a drainage pipeline or drainage outlet, and the filter tank has multiple filter layers arranged sequentially along the water flow direction.

2. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 1, characterized in that, The first insulation layer is polyurethane insulation material, and the second insulation layer is a double-layer hollow fiberglass plate.

3. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 2, characterized in that, The electric heat tracing layer is arranged in sections from top to bottom, and each section is independently controlled, including the upper electric heat tracing tape, the middle electric heat tracing tape, and the lower electric heat tracing tape.

4. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 1, characterized in that, The multi-channel filtration structure includes a structural body, inside which are multiple parallel gas channels, each containing a filter element; each of the multiple parallel gas channels has a chamber communicating with it at both ends, one chamber being open and containing a filter screen, and the other chamber having an air outlet.

5. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 1, characterized in that, The multi-layer filtration system includes, in sequence along the water flow direction, a sand filter layer, an activated carbon layer, and a volcanic rock layer.

6. The domestic sewage treatment device suitable for highways in cold and arid regions according to any one of claims 1-5, characterized in that, It also includes a clear water tank, which is located behind the filter tank and connected to the filter tank through a drainage pipeline or drain outlet; the clear water tank is equipped with a pump body and is connected to an external water supply device through a return water pipeline.

7. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 6, characterized in that, The A / O tank, the filter tank, and the clear water tank are all made of fiberglass or PVDF.

8. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 1, characterized in that, The biofilm packing material is a rope-type suspended packing material, which is suspended inside the A / O tank.

9. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 1, characterized in that, The A / O tank is equipped with a temperature sensor and a DO sensor; the gas supply line is equipped with a pressure sensor.

10. The domestic sewage treatment device suitable for highways in cold and arid regions according to claim 1, characterized in that, The A / O tank is connected to the sewage pipeline, which is equipped with an electric regulating valve and a flow meter.

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