Inner barrel of treatment barrel for sewage treatment

Abstract

The utility model relates to a treatment cylinder inner cylinder for sewage treatment, the internal space of the treatment cylinder inner cylinder is divided into an air purification chamber, a sludge chamber and a reclaimed water chamber which are isolated from one another, and the air purification chamber is used for mounting an air purification device; the air purification chamber is provided with a pollution gas inlet used for conveying pollution gas into the air purification device and a purified gas outlet used for conveying purified gas generated by the air purification device. And the space of the inner cylinder is fully utilized to arrange the air purification device.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an inner cylinder for wastewater treatment. Background Technology

[0002] In traditional wastewater treatment systems, to achieve a multi-stage process of "pretreatment + biological treatment + advanced treatment," multiple independent tanks need to be constructed on the ground, including primary sedimentation tanks, aeration tanks, secondary sedimentation tanks, and disinfection tanks. This results in a large land area for the wastewater treatment system, and the wastewater treatment facilities for each process stage are scattered, making it difficult to collect pollutants. When pollutants escape into the air, they have several adverse effects: 1. Pollutants contain toxic and harmful substances such as hydrogen sulfide, ammonia, and volatile organic compounds. Long-term exposure may cause respiratory diseases, headaches, and nausea, threatening the health of factory workers and nearby residents. 2. Pollutants can trigger photochemical reactions to generate ozone or PM2.5, exacerbating air pollution. 3. Severe odors significantly impact the quality of life for nearby residents.

[0003] Chinese patent CN115893667B discloses a wastewater treatment system, such as... Figure 1 As shown, the wastewater treatment system includes a foundation layer located below the ground surface and a treatment cylinder installed on the foundation layer. The treatment cylinder includes an inner cylinder 1 and an outer cylinder 2 coaxially fitted together. The treatment space formed between the inner cylinder 1 and the outer cylinder 2 is evenly divided into multiple fan-shaped zones. These fan-shaped zones are further divided into sequentially adjacent anaerobic, anoxic, and aerobic zones. The anaerobic and anoxic zones are connected, as are the anoxic and aerobic zones. Adjacent fan-shaped zones within the anaerobic, anoxic, and aerobic zones are sequentially connected, allowing the wastewater in the treatment cylinder to flow sequentially through each fan-shaped zone along a vertical serpentine path, thereby sequentially flowing through the anaerobic, anoxic, and aerobic zones. At least two layers of process platforms, arranged sequentially from top to bottom, are constructed around the treatment cylinder above the foundation layer. These include a first process platform 3 and a second process platform 4 located below the first process platform 3. Secondary sedimentation equipment is installed on the first process platform 3, and advanced treatment equipment is installed on the second process platform 4. A solid-liquid separation device, a central pressurization pump station, a sludge dewatering machine, a baling machine, and an emergency sewage discharge device are installed on the foundation layer. The inner cylinder 1 is divided into three enclosed areas arranged sequentially from top to bottom, serving as a fire water chamber, a greywater chamber, and a sludge chamber, respectively.

[0004] The solid-liquid separation device performs coarse filtration on the sewage entering the central booster pump station. The central booster pump station sends the coarsely filtered sewage into the anaerobic zone from the top of the treatment cylinder. The secondary sedimentation equipment is connected to the sewage outlet of the treatment cylinder (i.e., the sewage outlet of the aerobic zone). The advanced treatment equipment is connected to the clear water outlet of the secondary sedimentation equipment. The outlet of the advanced treatment equipment is connected to the greywater chamber. The sludge outlet of the secondary sedimentation equipment is connected to the sludge chamber. The sludge dewatering machine is used to dewater the sludge in the sludge chamber. The baling machine is used to bale the dewatered sludge into sludge bricks.

[0005] The aforementioned wastewater treatment system adopts a three-dimensional building form, reducing construction land use and centralizing the wastewater treatment facilities for each process stage. This also facilitates the collection of polluting gases during wastewater treatment. Therefore, providing a structure for collecting polluting gases from the aforementioned wastewater treatment system is an urgent technical problem to be solved. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an inner cylinder for a wastewater treatment cylinder, which makes full use of the inner cylinder space to arrange an air purification device.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] This utility model provides a treatment cylinder inner cylinder for sewage treatment. The internal space of the treatment cylinder inner cylinder is divided into an air purification chamber, a sludge chamber and a greywater chamber that are isolated from each other. The air purification chamber is used to install an air purification device. The air purification chamber is provided with a polluted gas inlet for conveying polluted gas into the air purification device and a purified gas outlet for conveying purified gas generated by the air purification device.

[0011] Optionally, the air purification chamber, sludge chamber, and greywater chamber are arranged axially along the inner cylinder, with the air purification chamber located above the sludge chamber and greywater chamber.

[0012] Optionally, the pollutant gas inlet includes a heavily polluted gas inlet for supplying pollutant gas to the biofilter of the air purification device and a lightly polluted gas inlet for supplying pollutant gas to the activated carbon adsorption unit of the air purification device.

[0013] Optionally, the inner cylinder of the treatment cylinder for wastewater treatment also includes a sludge discharge pipe. The sludge chamber is located above the greywater chamber and is separated from the greywater chamber by a conical bottom plate. There is a gap between the bottom plate of the greywater chamber and the lowest point of the conical bottom plate of the sludge chamber. A sludge outlet is provided at the tip of the conical bottom plate. The inlet of the sludge discharge pipe is connected to the sludge outlet, and the outlet of the sludge discharge pipe extends out of the inner cylinder through the side wall of the greywater chamber.

[0014] Optionally, the mud discharge pipe can be a bent pipe.

[0015] Optionally, the inner cylinder of the treatment cylinder also includes a first vent pipe and a second vent pipe; the inlet of the first vent pipe is connected to the upper part of the sludge chamber, and the outlet of the first vent pipe is located outside the inner cylinder and near the polluted gas inlet; the inlet of the second vent pipe is connected to the upper part of the greywater chamber, and the outlet of the second vent pipe is located outside the inner cylinder and near the polluted gas inlet.

[0016] Optionally, the upper part of the sludge chamber is also provided with a sludge inlet, and the inlet of the first vent pipe is higher than the sludge inlet; the upper part of the greywater chamber is also provided with a greywater inlet, and the inlet of the second vent pipe is higher than the greywater inlet.

[0017] Optionally, the internal space of the inner cylinder of the treatment tank is further divided into a fire water chamber, an air purification chamber, a fire water chamber, a sludge chamber, and a greywater chamber, which are arranged sequentially along the axial direction of the inner cylinder. The fire water chamber is located above the sludge chamber and the greywater chamber, and the air purification chamber is located above the fire water chamber. The greywater outlet of the greywater chamber is connected to the fire water inlet of the fire water chamber through a connecting pipe located outside the inner cylinder. The fire water outlet of the fire water chamber is used to supply water to the fire protection system of the wastewater treatment plant.

[0018] Optionally, the inner cylinder of the treatment cylinder for wastewater treatment also includes a sludge discharge pipe. The sludge chamber has a conical bottom plate, and a greywater chamber is formed between the conical bottom plate and the side wall of the inner cylinder. The sludge chamber is connected to the horizontal bottom plate of the greywater chamber through the conical bottom plate. A sludge outlet is provided at the lower part of the conical bottom plate near the horizontal bottom plate of the greywater chamber. The inlet of the sludge discharge pipe is connected to the sludge outlet, and the outlet of the sludge discharge pipe extends out of the inner cylinder through the side wall of the greywater chamber.

[0019] Optionally, the internal space of the inner cylinder of the treatment tank is further divided into a water purification chamber, an air purification chamber, a sludge chamber, a greywater chamber, and a water purification chamber, which are isolated from each other.

[0020] (III) Beneficial Effects

[0021] The beneficial effects of this utility model are:

[0022] The upper part of the inner cylinder of the treatment cylinder provided by this utility model forms an air purification chamber for an air purification device. Firstly, the space of the inner cylinder is used to arrange the air purification device, making full use of the space of the inner cylinder and making the overall structure of the sewage treatment system more compact. Secondly, the location of the inner cylinder in the middle of the sewage treatment system is advantageous, making it convenient for each sewage treatment facility to transport polluted gas to the air purification device, requiring a short gas transmission pipeline and low cost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a wastewater treatment system according to the background technology of this utility model;

[0024] Figure 2 This is a schematic diagram of the inner cylinder of the processing tube according to Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the inner cylinder of the processing tube according to Embodiment 2 of this utility model;

[0026] Figure 4 This is a schematic diagram of the inner cylinder of the processing cylinder according to Embodiment 3 of this utility model.

[0027] Explanation of reference numerals in the attached figures

[0028] 1: Inner cylinder;

[0029] 11: Air purification chamber; 12: Sludge chamber; 13: Greywater chamber; 14: Sludge discharge pipe; 15: First vent pipe; 16: Second vent pipe; 17: Fire water chamber;

[0030] 111: Polluted gas inlet; 112: Purified gas outlet; 113: Horizontal base plate;

[0031] 121: Conical bottom plate; 122: Mud inlet;

[0032] 131: Reclaimed water import; 132: Reclaimed water export;

[0033] 171: Fire water inlet; 172: Fire water outlet;

[0034] 2: Outer cylinder;

[0035] 3: First process platform;

[0036] 4: Second process platform. Detailed Implementation

[0037] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. The directional terms such as "upper" and "lower" used herein refer to... Figure 2 The orientation shall prevail.

[0038] Example 1

[0039] like Figure 2As shown, this embodiment provides a treatment cylinder inner cylinder 1 for sewage treatment. The internal space of the treatment cylinder inner cylinder 1 is divided into an air purification chamber 11, a sludge chamber 12, and a greywater chamber 13 arranged along the axial direction of the inner cylinder 1. The air purification chamber 11, sludge chamber 12, and greywater chamber 13 are isolated from each other. The air purification chamber 11 is used to install an air purification device. The air purification chamber 11 is located above the sludge chamber 12 and the greywater chamber 13. The side wall of the air purification chamber 11 is provided with a polluted gas inlet 111 for conveying polluted gas into the air purification device and a purified gas outlet 112 for conveying purified gas generated by the air purification device.

[0040] The inner cylinder 1 of the treatment cylinder is configured in this way, and an air purification chamber 11 for installing air purification devices is formed in the upper part of the inner cylinder 1. Firstly, the space of the inner cylinder 1 is used to arrange the air purification devices, making full use of the space of the inner cylinder 1, which is conducive to a more compact overall structure of the sewage treatment system. Secondly, the location advantage of the inner cylinder 1 in the middle of the sewage treatment system and the elevation effect of the inner cylinder 1 are utilized to facilitate the delivery of polluted gas from each sewage treatment facility to the air purification device, requiring a short gas delivery pipeline length and low cost.

[0041] Preferably, the air purification chamber 11, sludge chamber 12, and greywater chamber 13 are arranged sequentially along the axial direction of the inner cylinder 1. This facilitates the utilization of the elevation of the secondary sedimentation equipment by the sludge chamber 12 and the utilization of the elevation of the advanced treatment equipment by the greywater chamber 13. Specifically, the utilization of the elevation of the secondary sedimentation equipment by the sludge chamber 12 is achieved by placing the sludge inlet 122 of the sludge chamber 12 below the secondary sedimentation equipment, facilitating the transport of sludge generated by the secondary sedimentation equipment to the sludge chamber 12 by gravity due to the elevation difference. Similarly, the utilization of the elevation of the advanced treatment equipment by the greywater chamber 13 is achieved by placing the greywater inlet 131 of the greywater chamber 13 below the advanced treatment equipment, facilitating the transport of greywater generated by the advanced treatment equipment to the greywater chamber 13 by gravity due to the elevation difference.

[0042] Wastewater treatment processes often generate two types of pollutants: heavily polluted gases and lightly polluted gases. Heavily polluted gases are produced in the anaerobic zone, anoxic zone, sludge chamber 12, and sludge dewatering machine of the treatment tank. Lightly polluted gases are produced in the aerobic zone, facultative zone, secondary sedimentation equipment, and advanced treatment equipment of the treatment tank. Heavily polluted gases have high concentrations (e.g., H2S > 100 ppm) and complex compositions (containing sulfur-containing organic matter, halogenated hydrocarbons, benzene series compounds, and other recalcitrant VOCs), requiring sequential treatment by biological filters and activated carbon adsorption in air purification devices. Lightly polluted gases have lower concentrations (e.g., H2S < 50 ppm) and simpler compositions (mainly inorganic substances such as hydrogen sulfide and ammonia), requiring only activated carbon adsorption treatment in air purification devices.

[0043] To accommodate the air purification device's ability to classify and treat polluted gases, in this embodiment, the polluted gas inlet 111 includes a heavily polluted gas inlet for supplying polluted gases to the biological filter of the air purification device and a lightly polluted gas inlet for supplying polluted gases to the activated carbon adsorption unit of the air purification device. One end of the heavily polluted gas inlet extending out of the inner cylinder 1 is connected to the upper gas layer of the anaerobic zone of the treatment cylinder, the upper gas layer of the anoxic zone of the treatment cylinder, the upper gas layer of the sludge chamber 12, and / or the polluted gas outlet of the sludge dewatering machine. One end of the lightly polluted gas inlet extending out of the inner cylinder 1 is connected to the upper gas layer of the aerobic zone of the treatment cylinder, the upper gas layer of the facultative anaerobic zone of the treatment cylinder, the polluted gas outlet of the secondary sedimentation equipment, and / or the polluted gas outlet of the deep treatment equipment.

[0044] Specifically, in this embodiment, the air purification chamber 11 is separated from the sludge chamber 12 by a horizontal base plate 113.

[0045] Preferably, the inner cylinder 1 of the treatment cylinder further includes a sludge discharge pipe 14. The sludge chamber 12 is separated from the greywater chamber 13 by a conical bottom plate 121. A sludge outlet is provided at the tip of the conical bottom plate 121. The inlet of the sludge discharge pipe 14 is connected to the sludge outlet, and the outlet of the sludge discharge pipe 14 extends out of the inner cylinder 1 through the side wall of the greywater chamber 13. In this way, the conical bottom plate 121 is configured to facilitate the sludge to slide down and be discharged through the sludge discharge bend, and the sludge can be compressed during the process of sliding down into and out of the sludge discharge bend.

[0046] More preferably, the conical base plate 121 is conical in shape. Optionally, the conical base plate 121 is pyramidal in shape.

[0047] Furthermore, in this embodiment, the mud outlet pipe 14 is a bent pipe.

[0048] Preferably, the inner cylinder 1 of the treatment cylinder further includes a first vent pipe 15. The inlet of the first vent pipe 15 is connected to the upper part of the sludge chamber 12, and the outlet of the first vent pipe 15 is used to connect to the upper gas layer of the anaerobic zone, the upper gas layer of the anoxic zone, the upper gas layer of the aerobic zone, or the upper gas layer of the facultative anaerobic zone of the treatment cylinder. In this way, on the one hand, it can ensure that the air pressure in the sludge chamber 12 is below atmospheric pressure, which is conducive to the smooth entry of sludge into the sludge chamber 12; on the other hand, the polluted gas that escapes from the sludge chamber 12 through the first vent pipe 15 will also be collected and treated by the air purification chamber 11.

[0049] More preferably, the upper part of the sludge chamber 12 is also provided with a sludge inlet 122, and the inlet of the first vent pipe 15 is higher than the sludge inlet 122. In this way, it is convenient for the gas in the sludge chamber 12 to escape through the first vent pipe 15.

[0050] Furthermore, in this embodiment, the bottom plate of the greywater chamber 13 is located below the conical bottom plate 121 of the sludge chamber 12, and there is a gap between the bottom plate of the greywater chamber 13 and the lowest point of the conical bottom plate 121 of the sludge chamber 12.

[0051] Preferably, the inner cylinder 1 of the treatment cylinder further includes a second vent pipe 16. The inlet of the second vent pipe 16 is connected to the upper part of the greywater chamber 13, and the outlet of the second vent pipe 16 is used to connect to the upper gas layer of the anaerobic zone, the upper gas layer of the anoxic zone, the upper gas layer of the aerobic zone, or the upper gas layer of the facultative anoxic zone of the treatment cylinder. In this way, on the one hand, it can ensure that the gas pressure in the greywater chamber 13 is below atmospheric pressure, which is conducive to the smooth entry of greywater into the greywater chamber 13; on the other hand, the gas escaping from the greywater chamber 13 through the second vent pipe 16 will also be collected and treated by the air purification chamber 11.

[0052] More preferably, a greywater inlet 131 is provided at the upper part of the greywater chamber 13, and the inlet of the second vent pipe 16 is higher than the greywater inlet 131. This facilitates the escape of gas in the greywater chamber 13 through the second vent pipe 16.

[0053] Specifically, in this embodiment, a greywater outlet 132 is also provided at the lower part of the greywater chamber 13.

[0054] Example 2

[0055] The main difference between this embodiment and Embodiment 1 is:

[0056] like Figure 3 As shown, the internal space of the inner cylinder 1 of the treatment cylinder is further divided into a fire water chamber 17, an air purification chamber 11, a fire water chamber 17, a sludge chamber 12, and a greywater chamber 13 arranged sequentially along the axial direction of the inner cylinder 1. The fire water chamber 17 is located above the sludge chamber 12 and the greywater chamber 13, and the air purification chamber 11 is located above the fire water chamber 17. A fire water inlet 171 and a fire water outlet 172 are provided on the side wall of the fire water chamber 17. The greywater outlet 132 is connected to the fire water inlet 171 through a connecting pipe located outside the inner cylinder 1. The fire water outlet 172 is used to supply water to the fire protection system of the sewage treatment plant.

[0057] Thus, by positioning the fire water chamber 17 above the sludge chamber 12 and the greywater chamber 13, the elevation can be utilized to provide greater water pressure to the fire protection system.

[0058] Furthermore, the air purification chamber 11 is separated from the fire water chamber 17 by a horizontal base plate 113, and the fire water chamber 17 is separated from the sludge chamber 12 by a horizontal base plate 113.

[0059] The remaining contents are the same as in Example 1, and will not be repeated here.

[0060] Example 3

[0061] The main difference between this embodiment and Embodiment 1 is:

[0062] like Figure 4 As shown, the inner cylinder 1 of the treatment cylinder also includes a sludge discharge pipe 14. The sludge chamber 12 is connected to the bottom plate of the greywater chamber 13 through a conical bottom plate 121. The greywater chamber 13 is formed between the conical bottom plate 121 and the side wall of the inner cylinder 1. A sludge outlet is provided at the lower part of the conical bottom plate 121 near the bottom plate of the greywater chamber 13. The inlet of the sludge discharge pipe 14 is connected to the sludge outlet, and the outlet of the sludge discharge pipe 14 extends out of the inner cylinder 1 through the side wall of the greywater chamber 13. Compared with embodiment 1, this structure can greatly shorten the height of the inner cylinder 1. The ratio of the height to the diameter of the inner cylinder 1 is (0.7~1.2):1, while in embodiment 1 the ratio of the height to the diameter of the inner cylinder 1 is (2~3):1.

[0063] Furthermore, in this embodiment, the mud outlet pipe 14 is a straight pipe.

[0064] The remaining contents are the same as in Example 1, and will not be repeated here.

[0065] Example 4

[0066] The main difference between this embodiment and Embodiment 1 is:

[0067] The internal space of the inner cylinder 1 of the treatment cylinder is further divided into a water purification chamber, an air purification chamber 11, a sludge chamber 12, a greywater chamber 13, and a water purification chamber that are isolated from each other. The water purification chamber refers to greywater that has undergone deep treatment to meet safety standards and can be used directly for drinking or high-requirement scenarios.

[0068] Specifically, in this embodiment, the air purification chamber 11, sludge chamber 12, greywater chamber 13 and clean water chamber are arranged sequentially along the axial direction of the inner cylinder 1.

[0069] The remaining contents are the same as in Example 1, and will not be repeated here.

[0070] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A treatment cartridge inner cartridge for use in sewage treatment, characterised in that, The internal space of the inner cylinder (1) of the treatment cylinder is divided into an air purification chamber (11), a sludge chamber (12) and a greywater chamber (13) that are isolated from each other. The air purification chamber (11) is used to install an air purification device. The air purification chamber (11) is provided with a pollutant gas inlet (111) for conveying pollutant gas into the air purification device and a purified gas outlet (112) for conveying purified gas generated by the air purification device.

2. The inner cartridge for use in a cartridge for sewage treatment according to claim 1, characterized in that, The air purification chamber (11), sludge chamber (12) and greywater chamber (13) are arranged axially along the inner cylinder (1), with the air purification chamber (11) located above the sludge chamber (12) and greywater chamber (13).

3. The inner cartridge for use in a cartridge for sewage treatment according to claim 1, characterized in that, The pollutant gas inlet (111) includes a heavily polluted gas inlet for supplying polluted gas to the biofilter of the air purification device and a lightly polluted gas inlet for supplying polluted gas to the activated carbon adsorption unit of the air purification device.

4. The inner cartridge for use in a cartridge for sewage treatment according to claim 2, characterized in that, It also includes a sludge discharge pipe (14), a sludge chamber (12) located above a medium water chamber (13), a sludge chamber (12) separated from a medium water chamber (13) by a conical bottom plate (121), a gap between the bottom plate of the medium water chamber (13) and the lowest point of the conical bottom plate (121) of the sludge chamber (12), a sludge outlet is provided at the tip of the conical bottom plate (121), the inlet of the sludge discharge pipe (14) is connected to the sludge outlet, and the outlet of the sludge discharge pipe (14) extends out of the inner cylinder (1) through the side wall of the medium water chamber (13).

5. The inner cartridge for use in a cartridge for sewage treatment according to claim 4, characterized in that, The mud outlet pipe (14) is a bend.

6. The inner cartridge for use in a cartridge for sewage treatment according to claim 2, characterized in that, The inner cylinder (1) of the processing cylinder also includes a first vent pipe (15) and a second vent pipe (16); The inlet of the first vent pipe (15) is connected to the upper part of the sludge chamber (12), and the outlet of the first vent pipe (15) is located outside the inner cylinder (1) and close to the pollutant gas inlet (111); the inlet of the second vent pipe (16) is connected to the upper part of the greywater chamber (13), and the outlet of the second vent pipe (16) is located outside the inner cylinder (1) and close to the pollutant gas inlet (111).

7. A treatment inner cartridge for use in sewage treatment according to claim 6, characterised in that, The upper part of the sludge chamber (12) is also provided with a sludge inlet (122), and the inlet of the first vent pipe (15) is higher than the sludge inlet (122); the upper part of the greywater chamber (13) is also provided with a greywater inlet (131), and the inlet of the second vent pipe (16) is higher than the greywater inlet (131).

8. The inner cartridge for use in a treatment cartridge for sewage treatment according to claim 1, characterized in that, The internal space of the inner cylinder (1) of the treatment cylinder is further divided into a fire water chamber (17), an air purification chamber (11), a fire water chamber (17), a sludge chamber (12) and a grey water chamber (13) are arranged in sequence along the axial direction of the inner cylinder (1). The fire water chamber (17) is located above the sludge chamber (12) and the grey water chamber (13), and the air purification chamber (11) is located above the fire water chamber (17). The greywater outlet (132) of the greywater chamber (13) is connected to the fire water inlet (171) of the fire water chamber through a connecting pipe located outside the inner cylinder (1). The fire water outlet (172) of the fire water chamber is used to supply water to the fire protection system of the sewage treatment plant.

9. The inner cylinder of the treatment tank for sewage treatment according to claim 1, characterized in that, It also includes a sludge discharge pipe (14), a sludge chamber (12) having a conical bottom plate (121), a middle water chamber (13) being formed between the conical bottom plate (121) and the side wall of the inner cylinder (1), the sludge chamber (12) being connected to the horizontal bottom plate of the middle water chamber (13) through the conical bottom plate (121), a sludge outlet being provided at the lower part of the conical bottom plate (121) near the horizontal bottom plate of the middle water chamber (13), the inlet of the sludge discharge pipe (14) being connected to the sludge outlet, and the outlet of the sludge discharge pipe (14) extending out of the inner cylinder (1) through the side wall of the middle water chamber (13).

10. The inner cartridge for use in a treatment cartridge for sewage treatment according to claim 1, characterized in that, The internal space of the inner cylinder (1) of the treatment cylinder is further divided into a water purification chamber, an air purification chamber (11), a sludge chamber (12), a greywater chamber (13), and a water purification chamber that are isolated from each other.

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