Circulation micro-aerobic intermittent sludge aerobic fermentation treatment cabin

Abstract

The utility model relates to the technical field of sludge aerobic fermentation, in particular to a circulation micro-aerobic intermittent sludge aerobic fermentation treatment cabin which comprises a fermentation cabin body, an aeration system, guide plates and spoilers. The aeration system adopts a multi-stage spiral aeration pipe and a nano microporous aeration membrane, and an intermittent pulse oxygen supply mode is combined, so that the oxygen distribution is optimized, and the utilization rate is improved; the design of the guide plates and the spoilers enhances the sludge circulation effect and improves the fermentation efficiency. A gas filtering device is arranged at the top of the fermentation cabin, a heat-insulating layer and a heating pipe are arranged on the outer wall, and a sludge outlet is formed in the bottom. According to the invention, uniform distribution of oxygen can be realized, local oxygen deficiency or peroxidation is avoided, energy consumption and operation cost are reduced, and efficient, economic and environment-friendly sludge treatment requirements are met.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection and resource utilization technology, specifically a circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber. Background Technology

[0002] With the acceleration of urbanization and the continuous expansion of sewage treatment scale, the amount of sludge generated is increasing daily. Sludge contains a large amount of organic matter, pathogens, heavy metals, and other pollutants. If not properly disposed of, it will cause serious pollution and harm to the environment. Traditional sludge treatment methods mainly include landfill, incineration, and composting. Among them, sludge landfill not only occupies a large amount of land resources, but also poses the risk of leachate contamination of soil and groundwater; although incineration can reduce the volume and render the sludge harmless, its investment cost is high, and it may produce toxic and harmful gases such as dioxins during the combustion process, posing a threat to the environment and human health; composting treatment has a long treatment cycle and is greatly affected by factors such as climate, resulting in unstable treatment effects and making it difficult to meet actual needs.

[0003] Aerobic fermentation, as an environmentally friendly and effective sludge treatment technology, has received widespread attention and application in recent years. However, existing aerobic fermentation equipment and processes for sludge still have many problems that urgently need to be solved. For example, uneven oxygen distribution is common during fermentation, and anaerobic conditions can easily occur in some areas, resulting in the production of odorous substances and affecting the surrounding environment. Simultaneously, the inability to precisely control oxygen concentration and reaction conditions during fermentation leads to low fermentation efficiency, making it difficult for the treated sludge to meet ideal standards of harmlessness and resource utilization. Furthermore, traditional aerobic fermentation treatment devices for sludge are typically complex in structure, large in footprint, and have high operating costs, making it difficult to meet the needs of wastewater treatment plants of different sizes for efficient, economical, and environmentally friendly sludge treatment.

[0004] Therefore, developing an aerobic fermentation chamber for sludge treatment capable of intermittent operation with micro-aeration in a circulating flow is of significant practical importance. By designing a multi-stage circulating aeration structure (such as spiral aeration pipes or nanoporous aeration membranes) and combining it with gas-liquid two-phase flow simulation to optimize oxygen distribution uniformity and avoid localized hypoxia or hyperxia, and by employing intermittent pulsed oxygen supply (e.g., supplying oxygen for 30 seconds every 10 minutes), oxygen utilization is improved and energy consumption is reduced. This effectively solves the problems of uneven oxygen distribution, low fermentation efficiency, and high operating costs in existing technologies, providing a highly efficient, economical, and environmentally friendly solution for sludge treatment. Utility Model Content

[0005] To address the problems of uneven oxygen distribution, low fermentation efficiency, complex equipment structure, and high operating costs during the aerobic fermentation of sludge mentioned in the background art, a circulating micro-aerobic intermittent aerobic fermentation treatment chamber for sludge is provided to achieve uniform oxygen distribution, improve fermentation efficiency, and reduce operating costs. The circulating micro-aerobic intermittent aerobic fermentation treatment chamber for sludge includes a fermentation chamber body and an aeration system. The aeration system is located at the bottom of the fermentation chamber body, which is equipped with guide plates. A sludge inlet is located on the fermentation chamber body, and a circulating channel is formed between the guide plates and the inner wall of the fermentation chamber body. Baffles are connected between the guide plates, and the baffles are arranged in a ring shape according to the size of the circulating channel. The aeration system is connected to an external air supply device through an air supply pipeline, which is equipped with a pulse control valve to achieve intermittent oxygen supply.

[0006] Furthermore, the aeration system includes multi-stage spiral aeration pipes, which are arranged concentrically along the bottom of the fermentation chamber. Nanoporous aeration membranes are evenly distributed on the multi-stage spiral aeration pipes to optimize the uniformity of oxygen distribution and avoid local hypoxia or hyperxia.

[0007] Furthermore, the multi-stage spiral aeration pipes are connected by connecting pipes to adjust the gas flow rate of each stage of the spiral aeration pipe according to the fermentation requirements.

[0008] Furthermore, the guide plate includes an inner guide plate and an outer guide plate, both of which are arc-shaped, forming a circulation channel between them. The width of the circulation channel gradually decreases from the bottom upwards to enhance the circulation effect of the sludge.

[0009] Furthermore, the baffle includes a first baffle and a second baffle, which are staggered at the upper end of the guide plate. The first baffle and the second baffle have a certain tilt angle to change the flow direction and speed of the sludge.

[0010] Furthermore, the top of the fermentation chamber is equipped with an exhaust port, which is connected to a gas filter device. The gas filter device has an air outlet and is filled with an activated carbon adsorption layer to remove odor substances produced during the fermentation process.

[0011] Furthermore, the outer wall of the fermentation chamber is equipped with an insulation layer, and a heating pipe is embedded in the insulation layer. The heating pipe is connected to an external power source through a temperature control device to maintain a suitable temperature inside the fermentation chamber.

[0012] Furthermore, a sludge discharge port is provided at the bottom of the fermentation chamber, and a sludge pump is connected to the sludge discharge port. The sludge pump is connected to external sludge treatment equipment through a pipeline to achieve rapid discharge of sludge after fermentation.

[0013] The circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber of this utility model has the following advantages: by setting up multi-stage spiral aeration pipes and nanoporous aeration membranes, combined with the design of circulating channels and baffles, uniform oxygen distribution is achieved, avoiding local hypoxia or hyperxia; the intermittent pulse oxygen supply method improves oxygen utilization and reduces energy consumption; by optimizing the structure of the guide plates and baffles, the sludge circulation effect is enhanced, and the fermentation efficiency is improved; at the same time, the equipment has a compact structure and low operating cost, and can meet the high-efficiency, economical, and environmentally friendly sludge treatment needs of sewage treatment plants of different sizes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber of this utility model.

[0015] Figure 2 This is a schematic diagram of the fermentation chamber of this utility model.

[0016] Figure 3 This is a schematic diagram of the fermentation chamber, aeration system, and guide plate of this utility model.

[0017] Figure 4 This is a partially enlarged schematic diagram of the surrounding guide vane and spoiler of this utility model.

[0018] Figure 5 This is a partially enlarged cross-sectional view of the aeration system of this utility model.

[0019] In the picture:

[0020] 1. Fermentation chamber; 2. Aeration system; 3. Guide plate; 4. Baffle plate; 5. Air supply pipeline; 7. Multi-stage spiral aeration pipe; 8. Nanoporous aeration membrane; 9. Connecting pipe; 11. Inner guide plate; 12. Outer guide plate; 13. Circulation channel; 14. First baffle plate; 15. Second baffle plate; 16. Exhaust port; 17. Gas filtration device; 18. Insulation layer; 19. Heating pipe; 22. Sludge discharge port; 23. Sludge pump. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0023] 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] This utility model provides a circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber, the structure of which is explained in the following way: Figures 1 to 5 The accompanying drawings provide a detailed description. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings to fully disclose the technical solution and ensure its feasibility.

[0025] like Figure 1 As shown, the circulating micro-aerobic intermittent aerobic fermentation treatment chamber of this utility model mainly includes key components such as the fermentation chamber 1 and the aeration system 2. The fermentation chamber 1 is the core part of the entire device, and its internal space is used to hold the sludge to be treated. Through a series of design optimizations, it achieves efficient aerobic fermentation of sludge. The fermentation chamber 1 is equipped with a sludge inlet, and the bottom of the fermentation chamber 1 is equipped with the aeration system 2. This system is connected to an external air supply device (not shown in the figure) through an air supply pipeline 5. A pulse control valve (not shown in the figure) is installed on the air supply pipeline 5 to achieve intermittent oxygen supply. This intermittent oxygen supply method can significantly improve oxygen utilization and reduce energy consumption, while avoiding the local over-oxygenation or hypoxia that may occur in traditional continuous oxygen supply methods.

[0026] The specific structure of aeration system 2 is as follows: Figure 5As shown, its core component is a multi-stage spiral aeration pipe 7. The multi-stage spiral aeration pipes 7 are arranged concentrically along the bottom of the fermentation chamber 1, with nanoporous aeration membranes 8 evenly distributed on each aeration pipe. The design of the nanoporous aeration membranes 8 allows gas to be released into the sludge in the form of tiny bubbles, thereby significantly improving the oxygen dissolution efficiency in the sludge. Furthermore, the multi-stage spiral aeration pipes 7 are connected by connecting pipes 9, allowing for flexible adjustment of the gas flow rate of each stage of the spiral aeration pipe 7 according to actual fermentation needs, thereby further optimizing the uniformity of oxygen distribution. For example, in the early stages of fermentation, the gas flow rate of the outer ring aeration pipes can be appropriately increased to promote oxygen diffusion on the sludge surface; while in the later stages of fermentation, the gas flow rate of the outer ring can be reduced, concentrating oxygen supply to the inner ring area to improve fermentation efficiency.

[0027] The guide vane 3 is an important component of this utility model, and its structure is as follows: Figure 3 and Figure 4 As shown, the guide plate 3 includes an inner guide plate 11 and an outer guide plate 12, both of which are arc-shaped, and a circulation channel 13 is formed between the inner guide plate 11 and the outer guide plate 12. The width of the circulation channel 13 gradually decreases from the bottom to the top. This design can enhance the circulation effect of sludge in the fermentation chamber 1, allowing the sludge to circulate continuously during fermentation, thereby avoiding local sludge accumulation or stagnation. In addition, a baffle plate 4 is connected between the inner guide plate 11 and the outer guide plate 12. The baffle plate 4 includes a first baffle plate 14 and a second baffle plate 15, which are staggered and inclined. By adjusting the inclination angle of the first baffle plate 14 and the second baffle plate 15, the flow direction and speed of the sludge can be changed, further optimizing the sludge mixing effect.

[0028] The fermentation chamber 1 has an exhaust port 16 at its top, which is connected to a gas filter device 17. The gas filter device 17 is filled with an activated carbon adsorption layer (not shown in the figure) to remove odor substances generated during fermentation and ensure that the emitted gas meets environmental protection requirements. In addition, the outer wall of the fermentation chamber 1 is provided with an insulation layer 18, and a heating pipe 19 is embedded in the insulation layer 18. The heating pipe 19 is connected to an external power source (not shown in the figure).

[0029] The gas supply line 5 is also equipped with a pulse control valve. The opening time and gas supply volume of the pulse control valve (not shown in the figure) can be adjusted to achieve precise oxygen supply. For example, in the early stage of fermentation, the opening time of the pulse control valve can be set to supply oxygen for 30 seconds every 10 minutes to meet the high oxygen demand of the sludge; while in the later stage of fermentation, the oxygen supply interval can be appropriately extended and the oxygen supply frequency reduced to save energy.

[0030] The bottom of the fermentation chamber 1 is equipped with a sludge discharge port 22, which is connected to a sludge pump 23. The sludge pump 23 is connected to external sludge treatment equipment (not shown in the figure) via a pipeline. After the fermentation process is completed, the fermented sludge can be quickly discharged through the sludge pump 23 for subsequent treatment. This design not only improves the efficiency of sludge treatment but also reduces the complexity of manual operation.

[0031] The pulse control valve, activated carbon adsorption layer, sludge treatment equipment, air supply device, external power supply, nanoporous aeration membrane 8, gas filtration device 17, and sludge pump 23 mentioned above are all common knowledge in this field. They are only used and not modified, so the control methods and circuit connections will not be described in detail.

[0032] This invention's circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber has significant advantages in practical applications. For example, in the actual operation of a wastewater treatment plant, this chamber was used to aerobically ferment sludge with a moisture content of 80%. First, the sludge is injected into the fermentation chamber 1 through the inlet, and the aeration system 2 is started, supplying oxygen to the fermentation chamber 1 through the air supply pipeline 5. In the early stages of fermentation, the control system, based on feedback data from pressure sensors and flow meters, sets the opening time of the pulse control valve to supply oxygen for 30 seconds every 10 minutes. Simultaneously, the flow rate of the multi-stage spiral aeration pipe 7 is adjusted through the flow regulating valve to ensure even oxygen distribution in the sludge. At the same time, the heating pipe 19 maintains the temperature inside the fermentation chamber 1 between 30°C and 35°C through a temperature control device to promote microbial activity. As the fermentation process progresses, the sludge continuously circulates within the circulating channel 13, and the baffle plate 4 further enhances the mixing effect of the sludge, preventing localized hypoxia or hyperxia. Odor gases generated during fermentation enter the gas filtration device 17 through the exhaust port 16, are treated by the activated carbon adsorption layer, and are then released into the atmosphere, ensuring environmental friendliness. After fermentation is completed, the fermented sludge is discharged from the sludge discharge port 22 by the sludge pump 23. The entire treatment process is efficient, economical, and environmentally friendly.

[0033] In summary, the circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber of this invention achieves uniform oxygen distribution through the combination of multi-stage spiral aeration pipes 7 and nanoporous aeration membranes 8; it improves oxygen utilization and reduces energy consumption through intermittent pulse oxygen supply; and it enhances the sludge circulation effect and improves fermentation efficiency by optimizing the structure of the guide plate 3 and the baffle plate 4. At the same time, the equipment has a compact structure and low operating costs, and can meet the high-efficiency, economical, and environmentally friendly sludge treatment needs of wastewater treatment plants of different sizes.

[0034] It should be noted that all electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device that can be controlled by a computer or other means. The detailed description of known functions and known components is omitted in the specific implementation of this disclosure. In order to ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber, characterized in that... It includes a fermentation chamber (1) and an aeration system (2). The aeration system (2) is located at the bottom of the fermentation chamber (1). The fermentation chamber (1) is equipped with a guide plate (3). The fermentation chamber (1) is equipped with a mud inlet. A circulation channel (13) is formed between the guide plate (3) and the inner wall of the fermentation chamber (1). A baffle plate (4) is connected between the guide plates (3). The baffle plate (4) is arranged in a ring according to the size of the circulation channel (13) and there are several of them. The aeration system (2) is connected to an external air supply device through an air supply pipeline (5). A pulse control valve is provided on the air supply pipeline (5).

2. The circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber according to claim 1, characterized in that... The aeration system (2) includes a multi-stage spiral aeration pipe (7), which is arranged in concentric circles along the bottom of the fermentation chamber (1). Nanoporous aeration membranes (8) are evenly distributed on the multi-stage spiral aeration pipe (7).

3. The circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber according to claim 2, characterized in that... The multi-stage spiral aeration pipes (7) are connected by connecting pipes (9).

4. The circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber according to claim 1, characterized in that... The guide vane (3) includes an inner guide vane (11) and an outer guide vane (12). Both the inner guide vane (11) and the outer guide vane (12) are arc-shaped. A circulation channel (13) is formed between the inner guide vane (11) and the outer guide vane (12). The width of the circulation channel (13) gradually decreases from the bottom to the top.

5. The circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber according to claim 1, characterized in that... The spoiler (4) includes a first spoiler (14) and a second spoiler (15), which are alternately arranged between the inner guide plate (11) and the outer guide plate (12).

6. The circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber according to claim 1, characterized in that... The fermentation chamber (1) is equipped with an exhaust port (16) at the top. The exhaust port (16) is connected to a gas filter device (17). The gas filter device (17) is equipped with an air outlet and is filled with an activated carbon adsorption layer.

7. The circulating micro-aerobic intermittent sludge aerobic fermentation treatment chamber according to claim 1, characterized in that... The outer wall of the fermentation chamber (1) is provided with a heat insulation layer (18), and a heating pipe (19) is embedded in the heat insulation layer (18). The heating pipe (19) is connected to an external power source.

Images