Multi-membrane aeration device and aeration system applied to kitchen biogas slurry treatment

Abstract

The utility model discloses a multi-membrane aeration device and aeration system applied to kitchen biogas slurry treatment, and relates to the field of kitchen biogas slurry treatment. The aerators with various aeration hole diameter specifications are arranged in the aerator group, so that the aeration mode and the aeration quantity can be flexibly adjusted according to the change of the quality of the biogas slurry, and the requirements of microorganisms on oxygen under different working conditions are met. By arranging the pressure regulating switch at the air inlet of the aerator, the aerator can be started and stopped by sensing the pressure through the pressure regulating switch, so that pulse type aeration can be realized, and when the aeration hole is blocked, the pressure in the aerator and the air storage cavity is increased, and the pressure regulating switch is used for sensing the pressure increase and automatically starting the corresponding aerator; by increasing the aeration rate and the aeration pressure, blocking substances are blown away in time, and the situation that the use energy consumption and the maintenance cost are increased due to the fact that the aeration device is blocked is avoided. According to the utility model, the problems of single aeration mode, easiness in blockage, high energy consumption, high cost and the like of the traditional aeration device are solved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen waste biogas slurry treatment, and in particular to a multi-membrane aeration device and aeration system for kitchen waste biogas slurry treatment. Background Technology

[0002] Food waste biogas slurry is a product of pretreatment and anaerobic fermentation of food waste. It is rich in high concentrations of ammonia nitrogen, organic matter, and various microorganisms, making it more difficult to treat than general industrial wastewater. In the treatment of food waste biogas slurry, aeration plays a crucial role, promoting the decomposition and transformation of pollutants in the slurry, reducing pollutant concentrations, and ultimately purifying the water.

[0003] However, the inventors are aware that some traditional aeration devices face numerous shortcomings when treating kitchen waste biogas slurry. First, the water quality varies significantly between different batches of kitchen waste biogas slurry, and water quality fluctuations also occur during the treatment process. Traditional aeration devices have a single aeration mode, which cannot meet the treatment requirements of kitchen waste biogas slurry with different water qualities, resulting in inconsistent treatment effects and making it difficult to meet increasingly stringent environmental protection requirements. Second, when the kitchen waste biogas slurry has poor water quality, the high content of suspended solids and viscous substances in the biogas slurry easily adheres to the aeration membrane or aeration port, causing blockage of the aeration device. This not only increases aeration energy consumption and equipment maintenance costs, but also greatly affects aeration efficiency and biogas slurry aeration treatment effect.

[0004] Therefore, there is an urgent need to propose a new type of aeration device for the treatment of kitchen waste biogas slurry, in order to overcome the problems of the above-mentioned traditional aeration devices, such as single aeration mode, easy clogging, high energy consumption, and high cost. Utility Model Content

[0005] The purpose of this invention is to provide a multi-membrane aeration device and aeration system for the treatment of kitchen waste biogas slurry. It can flexibly adjust the aeration mode according to the changes in biogas slurry water quality. It can not only adapt to water quality fluctuations and carry out efficient and stable aeration treatment of kitchen waste biogas slurry, but also has high-efficiency anti-clogging performance, so as to solve the problems of single aeration mode, easy clogging, high energy consumption and high cost of the above-mentioned traditional aeration devices.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] On the one hand, this utility model provides a multi-membrane aeration device for treating kitchen waste biogas slurry, comprising:

[0008] An air storage chamber is provided for connecting an external air supply system, which supplies air to the air storage chamber.

[0009] An aerator group is disposed on the air storage chamber. The aerator group includes multiple aerators, and the diameters of the aeration holes of all the aerators are not exactly the same or completely different. The air inlet of any aerator is connected to the air storage chamber through a pressure regulating switch, which can control the connection or disconnection between the aerator and the air storage chamber.

[0010] Optionally, the aerator assembly includes:

[0011] Aerator 1 is disposed on the air storage chamber, and the air inlet of aerator 1 is connected to the air storage chamber through pressure regulating switch 1.

[0012] A second aerator is disposed on the air storage chamber, and the air inlet of the second aerator is connected to the air storage chamber through a pressure regulating switch.

[0013] The aeration hole diameter of the second aerator is larger than that of the first aerator.

[0014] Optionally, one aerator second is provided and is located at the center of the air storage chamber; multiple aerator first are provided and are evenly distributed on the outer periphery of the aerator second.

[0015] Optionally, the aeration hole diameter of the first aerator is 0.01mm~0.05mm; and the aeration hole diameter of the second aerator is 0.05mm~0.10mm.

[0016] Optionally, any one of the aerators includes an air-venting base, a diaphragm, and a fastening ring. An airflow channel is provided inside the air-venting base. The diaphragm covers the air outlet of the air-venting base and is fixed to the air outlet of the air-venting base by the fastening ring. The aeration holes are formed on the diaphragm. The air inlet of the air-venting base extends into the air storage chamber and is connected to the corresponding pressure control switch.

[0017] Optionally, the membrane is an oleophobic polymer membrane resistant to microbial corrosion.

[0018] Optionally, the air storage chamber is a cylindrical air storage plate, the aerator assembly is disposed at one axial end of the cylindrical air storage plate, and multiple support legs are disposed at the other axial end of the cylindrical air storage plate. The bottom end of any one of the support legs is provided with a fixing toe, which is used to fix it to the bottom of the aeration tank.

[0019] Optionally, the multi-membrane aeration device for treating kitchen waste biogas slurry further includes a control system, which is communicatively connected to any one of the pressure regulating switches to control the opening and closing of the pressure regulating switches.

[0020] Optionally, the multi-membrane aeration device for treating kitchen waste biogas slurry further includes an air supply system, and the air storage chamber is connected to the air supply system through an aeration pipe.

[0021] On the other hand, this utility model also proposes an aeration system for treating kitchen waste biogas slurry, including an aeration tank and a multi-membrane aeration device for treating kitchen waste biogas slurry as described in any one of the above. The aeration tank is used to store kitchen waste biogas slurry to be treated, and the multi-membrane aeration device for treating kitchen waste biogas slurry is fixed to the bottom of the aeration tank.

[0022] The present invention achieves the following technical advantages over the prior art:

[0023] This invention proposes a multi-membrane aeration device for treating kitchen waste biogas slurry. By configuring aerators with various aeration hole diameters in the aerator group, it can activate only one aerator diameter or simultaneously activate at least two aerator diameters according to changes in biogas slurry quality. This provides diverse aeration modes and allows for flexible adjustment of aeration mode and volume based on biogas slurry quality changes, adapting to water quality fluctuations and meeting the oxygen requirements of microorganisms under different operating conditions. Furthermore, by equipping each aerator's air inlet with a pressure control switch, the aerator can be activated and deactivated based on pressure. This not only enables pulse aeration but also utilizes the increased pressure within the aerator and air storage chamber when aeration holes are blocked. The pressure control switch senses this pressure increase and automatically activates the corresponding aerator, thereby increasing aeration volume and pressure to promptly remove blockages and prevent increased energy consumption and maintenance costs due to clogging. Compared to traditional continuous aeration, pulse aeration can effectively reduce energy consumption while ensuring the treatment effect of kitchen waste biogas slurry.

[0024] In summary, the multi-membrane aeration device of this invention has high efficiency and anti-clogging performance and can adapt to water quality fluctuations, solving the problems of single aeration mode, easy clogging, high energy consumption and high cost of traditional aeration devices.

[0025] The aeration system for treating kitchen waste biogas slurry proposed in this utility model includes an aeration tank and the aforementioned multi-membrane aeration device for treating kitchen waste biogas slurry. It possesses all the features of the aforementioned multi-membrane aeration device, which will not be repeated here. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the multi-membrane aeration device for treating kitchen waste biogas slurry disclosed in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Top view;

[0029] Figure 3 for Figure 2 AA cross-section view;

[0030] Figure 4 for Figure 2 BB cross-section;

[0031] Figure 5 This is a schematic diagram of the structure of aerator one and aerator two disclosed in the embodiments of this utility model;

[0032] Figure 6 This is a schematic diagram of the multi-membrane aeration device disclosed in the embodiment of the present invention in working mode one;

[0033] Figure 7 This is a schematic diagram of the multi-membrane aeration device disclosed in this embodiment of the present invention in working mode two;

[0034] Figure 8 This is a schematic diagram of the multi-membrane aeration device in working mode three, as disclosed in the embodiments of this utility model.

[0035] In the figure, the attached figures are labeled as follows:

[0036] A multi-membrane aeration device for treating kitchen waste biogas slurry; 1. Air storage chamber; 2. First aerator; 3. Second aerator; 4. Third aerator; 5. Fourth aerator; 6. Pressure control switch; 7. Aerator; 8. Pressure control switch; 9. Air base; 10. Membrane; 11. Fastening ring; 12. Support leg; 13. Fixing toe; 14. Aeration pipe. Detailed Implementation

[0037] 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.

[0038] The purpose of this invention is to provide a multi-membrane aeration device and aeration system for the treatment of kitchen waste biogas slurry. It can flexibly adjust the aeration mode according to the changes in biogas slurry water quality. It can not only adapt to water quality fluctuations and carry out efficient and stable aeration treatment of kitchen waste biogas slurry, but also has high-efficiency anti-clogging performance, so as to solve the problems of single aeration mode, easy clogging, high energy consumption and high cost of the above-mentioned traditional aeration devices.

[0039] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0040] This embodiment provides a multi-membrane aeration device 100 for treating kitchen waste biogas slurry, including an air storage chamber 1 and an aerator group. The air storage chamber 1 is used to connect to an external air supply system, which provides aeration gas to the air storage chamber 1. The aerator group is disposed on the air storage chamber 1 and includes multiple aerators. The aerator holes of all aerators are not completely the same or are completely different. Generally, it is preferred that the aerator group includes at least two aerators with different aerator hole diameters. The aerators with different aerator hole diameters have different aerator hole sizes. The air inlet of any aerator is connected to the air storage chamber 1 through a pressure control switch. The pressure control switch can independently control the connection or disconnection of each aerator from the air storage chamber.

[0041] The aforementioned multi-membrane aeration device 100 for treating kitchen waste biogas slurry, by configuring aerators with various aeration hole diameters in the aerator group, can activate only one type of aerator or simultaneously activate at least two types of aerators according to changes in biogas slurry quality. This provides diverse aeration modes and allows for flexible adjustment of aeration mode and volume based on biogas slurry quality changes, adapting to water quality fluctuations and meeting the oxygen requirements of microorganisms under different operating conditions. Furthermore, by equipping each aerator's air inlet with a pressure control switch, the aerator can be activated and deactivated based on pressure. This not only enables pulse aeration but also utilizes the increased pressure within the aerator and air storage chamber 1 when aeration holes are blocked. The pressure control switch senses this pressure increase and automatically activates the corresponding aerator, thereby increasing aeration volume and pressure to promptly remove blockages and prevent increased energy consumption and maintenance costs due to clogging. Compared to traditional continuous aeration, pulse aeration can effectively reduce energy consumption while ensuring the treatment effect of kitchen waste biogas slurry.

[0042] In summary, the multi-membrane aeration device proposed in this solution has high efficiency and anti-clogging performance and can adapt to water quality fluctuations, solving the problems of single aeration mode, easy clogging, high energy consumption and high cost of traditional aeration devices.

[0043] In some implementations, such as Figures 1-4As shown, the preferred aerator group includes two types of aerators with different aeration hole diameters, namely aerator one and aerator two 7. The aeration hole diameter of aerator two 7 is larger than that of aerator one. Both aerator one and aerator two 7 are mounted on the air storage chamber 1. The air inlet of aerator one is connected to the air storage chamber 1 via pressure control switch one 6, and the air inlet of aerator two 7 is connected to the air storage chamber 1 via pressure control switch two 8.

[0044] In some embodiments, the multi-membrane aeration device 100 for treating kitchen waste biogas slurry is also equipped with a control system. The control system is communicatively connected to any one of the pressure regulating switches 6 and 8 to control the opening and closing of any one of the pressure regulating switches 6 and 8.

[0045] In some implementations, such as Figures 1-4 As shown, preferably, multiple aerators 1 and at least one aerator 2 7 are simultaneously arranged on the air storage chamber 1. Taking one aerator 2 7 and four aerators 1 as an example, the four aerators 1 are designated as first aerator 2, second aerator 3, third aerator 4, and fourth aerator 5. Aerator 2 7 is located at the center of the air storage chamber 1, and first aerator 2, second aerator 3, third aerator 4, and fourth aerator 5 are evenly distributed around the outer periphery of aerator 2 7, forming a quincunx-shaped aerator group. The aerator orifice size specifications in the aerator group are not limited to the above two specifications; more than three specifications can be set according to actual needs. Correspondingly, the number and arrangement of each specification of aerator in the aerator group are not limited to the above-mentioned quincunx arrangement of a single aerator 2 7 and four aerators 1; they can be flexibly adjusted according to actual needs.

[0046] Each aerator 1 can be called a "micro-pore aeration device" because of its relatively small orifice diameter, while aerator 2 can be called a "medium-pore aeration device" because of its relatively large orifice diameter. The aeration airflow of the micro-pore aeration device has a smaller airflow pressure and flow rate compared to that of the medium-pore aeration device.

[0047] In some embodiments, the aeration hole diameter of each aerator in the aerator group is preferably 0.01mm~0.05mm; the aeration hole diameter of aerator 7 is preferably 0.05mm~0.10mm. Based on this, the aeration hole diameters of aerator 1 and aerator 2 7 form a gradient, which is beneficial for sufficient oxygenation, mixing, and agitation of the biogas slurry according to different operating conditions. It should be noted that the aeration holes located in the same aerator have the same hole size.

[0048] In some embodiments, pressure control switch 6 and pressure control switch 8 have the same structure, both preferably being mechanical remote pressure control switches. These mechanical remote pressure control switches are conventional finished products, integrating pressure sensing, intelligent control, and remote communication. In use, the core component of the mechanical remote pressure control switch, a high-precision pressure sensor, constantly monitors pressure changes within the gas storage chamber. When the pressure in the gas storage chamber rises to a preset opening threshold, the pressure control switch is triggered, generating a signal. This signal is quickly transmitted to the intelligent control unit built into the switch. This intelligent control unit communicates with the aforementioned control system and transmits the signal generated by the pressure control switch to the control system. Based on the received signal, the control system drives the pressure control switch to open, allowing aeration air to smoothly enter the aerator, thus achieving the aeration function. Conversely, when the pressure inside the aerator drops to the closing threshold, the control system can control the switch to close, thereby realizing pulse aeration. Compared to traditional continuous aeration, this effectively reduces energy consumption while ensuring the treatment effect of the biogas slurry. The pressure switching thresholds of each switch can be remotely adjusted through the control system according to changes in biogas slurry quality and different treatment stages.

[0049] During the biogas slurry aeration process, pressure control switch 6 is generally kept on. Pressure control switch 8 can turn on aerator 7 to avoid blockage and increase aeration volume according to the fluctuation of biogas slurry water quality, so as to meet the oxygen demand of different water qualities, or turn off aerator 7 to reduce aeration volume, thereby achieving energy saving and consumption reduction.

[0050] In some embodiments, the first aerator 2, the second aerator 3, the third aerator 4, the fourth aerator 5, and the second aerator 7 have identical structures. Taking the first aerator 2 as an example, as... Figure 1 and Figure 5As shown, it includes an air-venting base 9, a diaphragm 10, and a fastening ring 11. The air-venting base 9 is funnel-shaped and has an airflow channel inside. The diaphragm 10 covers the air outlet of the air-venting base 9 (i.e., the large end of the air-venting base 9) and is fixed to the air outlet of the air-venting base 9 by the fastening ring 11 from the outer periphery. The diaphragm 10 has multiple aeration holes evenly distributed on it. The air inlet of the air-venting base 9 (i.e., the small end of the air-venting base 9) is equipped with a pressure control switch. Specifically, the air inlet of the air-venting base 9 of each aerator 1 is equipped with a pressure control switch 6, while the air inlet of the air-venting base 9 of aerator 2 7 is equipped with a pressure control switch 8. In each aerator, the outer wall of the air inlet end (i.e., the small end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end is provided with an external thread, and the air storage chamber 1 is provided with an internal thread hole that matches the external thread. Each aerator is threadedly connected and fixed to the air storage chamber 1 through the external thread of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end of the air inlet end. After installation, the air outlet end of the air inlet ... the air inlet end of the air inlet end of the air inlet end the air inlet end of the air inlet end of the air inlet end the air inlet end of the air inlet end the air inlet end of the air inlet end the air inlet end of the air inlet end the air inlet end of the air inlet end the air inlet end of

[0051] It should be noted that, Figure 5 The structure shown can refer to any one of the first aerator 2, the second aerator 3, the third aerator 4, the fourth aerator 5, and the aerator 7, and the structure of each aerator 1 is exactly the same. Figure 5 The first aerator 2 shown can also refer to a second aerator 7. Similarly, Figures 6-8 The first aerator-2 can also refer to the second aerator-3; correspondingly, the third aerator-4 can also refer to the fourth aerator-5.

[0052] In some embodiments, the membranes 10 of the first aerator 2, the second aerator 3, the third aerator 4, the fourth aerator 5, and the second aerator 7 are preferably oleophobic and microbial-resistant polymer membranes, including but not limited to fluoropolymer membranes such as PVDF and silicone polymer membranes. This oleophobic polymer membrane 10 is chosen because the biogas slurry contains a high amount of oil, and ordinary materials are easily clogged by oil, affecting the aeration effect. This material has low surface energy and a natural repulsion of oil, effectively reducing oil adhesion to the membrane surface and further improving anti-clogging performance. Simultaneously, the microbial corrosion resistance of the membrane 10 is also crucial. The abundant microorganisms in the biogas slurry produce various corrosive substances during metabolism. Ordinary polymer materials are easily corroded and damaged in this environment, resulting in a short service life. Microbial-resistant polymer materials, with their special chemical structure, can resist the corrosive effects of microorganisms, thereby ensuring long-term stable operation and extending service life. In addition, polymer materials generally have good flexibility, which allows the membrane 10 to deform appropriately with pressure changes during aeration, avoiding rupture due to stress concentration and further improving its anti-pollution ability.

[0053] In some embodiments, the aeration base 9 is preferably made of a high-strength, corrosion-resistant metal material, such as stainless steel of grades SUS304 and SUS316L, to provide stable and uniform support for the diaphragm 10 and prevent the diaphragm 10 from deforming or breaking due to pressure during aeration.

[0054] In some embodiments, the gas storage chamber 1 is preferably a cylindrical gas storage plate, such as prism-shaped (including but not limited to square prisms, pentagonal prisms, etc.), cylindrical, etc. Figures 1-4 As shown, the air storage chamber 1 is a cylindrical air storage plate. Aerator 1 and aerator 2 7 are both set at one end of the axial direction of the cylindrical air storage plate, and preferably, aerator 1 and aerator 2 7 are evenly distributed on the end face of the cylindrical air storage plate.

[0055] In some embodiments, the gas storage chamber 1 is preferably made of corrosion-resistant stainless steel SUS304. Its main function is to temporarily store the aeration gas supplied by the gas supply system, forming a stable pressure space. The gas storage chamber 1 can be a one-piece molded structure or a modular assembly structure. For ease of maintenance, the gas storage chamber 1 is preferably assembled from two parts, an upper cylindrical shell and a lower cylindrical shell, respectively. After the upper and lower cylindrical shells are joined, they can be tightened and fixed by a threaded structure or by a snap-fit ​​structure.

[0056] Furthermore, the multi-membrane aeration device 100 used for treating kitchen waste biogas slurry is generally installed vertically. Each aerator 1 and aerator 2 7 is located on the top end face of the cylindrical air storage plate, and the aeration holes of each aerator 1 and aerator 2 7 face upward. Multiple support legs 12 are provided on the bottom end face of the cylindrical air storage plate. The support legs 12 are used to support the cylindrical air storage plate from the bottom. Each support leg 12 has a fixing toe 13 at its bottom end. The fixing toe 13 is used to fix it to the bottom of the aeration tank, so as to fix the entire multi-membrane aeration device to the bottom of the aeration tank.

[0057] In some embodiments, the bottom end of the cylindrical air storage plate is evenly provided with 3 to 6 support legs 12, and the fixing toe 13 is preferably circular and has a toe punch hole, so that the fixing toe 13 can be fixedly connected to the bottom of the aeration tank by expansion bolts. Both the support legs 12 and the fixing toe 13 are preferably made of SUS304 stainless steel, wherein the support legs 12 can be square tube or round tube structure; the support legs 12 can be fixed to the air storage chamber 1 by bolt connection or welding.

[0058] The aforementioned multi-membrane aeration device 100 for treating kitchen waste biogas slurry is equipped with aerator one and aerator two 7. Aerator one and aerator two 7 have different aeration hole diameters, which can flexibly adjust the pressure threshold automatically or remotely according to the water quality of the biogas slurry and the pressure value changes. Through the control of the pressure control switch, three working modes can be realized:

[0059] Working Mode 1: In the initial stage of system operation, the biogas slurry quality is good and there is no dirt blockage on the membrane surface of the aerator. At this time, the system pressure is in a low range and the multi-membrane aeration device only turns on the first aerator-2, the second aerator-3, the third aerator-4 and the fourth aerator-5 for aeration.

[0060] Working Mode 2: When the biogas slurry quality is poor and there is a small amount of dirt on the surface of the aerator membrane, causing the pressure to rise to the first opening threshold, the first aerator 12, the second aerator 13, the third aerator 14 and the fourth aerator 15 can be closed by controlling the pressure regulation switch, and aerator 27 can be opened alone to remove the dirt, grease and particles attached to the surface of each aerator membrane with a larger air volume.

[0061] Operating Mode 3: When the water quality is very poor and there is a lot of dirt on the membrane surface of the aerator, the device pressure will continue to rise. When the pressure rises to the second opening threshold (the second opening threshold is higher than the first opening threshold), the first aerator 2, the second aerator 3, the third aerator 4, the fourth aerator 5 and the second aerator 7 will be opened simultaneously. This can quickly and completely remove the dirt attached to the membrane surface of each aerator, thereby restoring the device to its initial state, reducing the operating pressure and achieving the purpose of energy saving and consumption reduction.

[0062] In use, the multi-membrane aeration device 100 for treating kitchen waste biogas slurry is fixed to the bottom of the aeration tank and submerged in the kitchen waste biogas slurry to be treated.

[0063] like Figure 6 The diagram shows the working state of the above working mode one: When the biogas slurry treatment system is initially started or the system is already running stably, the pressure in the gas storage chamber 1 is in a low range, and the pressure control switch 6 on the first aerator 2, the second aerator 3, the third aerator 4 and the fourth aerator 5 are all turned on. The first aerator 2, the second aerator 3, the third aerator 4 and the fourth aerator 5 are all in working state. At this time, the pressure control switch 8 is in the closed state, and the second aerator 7 is not turned on.

[0064] like Figure 7 The diagram shows the working state of the above-mentioned working mode two: When the biogas slurry system has been started, after the multi-membrane aeration device 100 used for the treatment of kitchen waste biogas slurry has been running for a period of time, some particulate oily dirt may adhere to the surface of some aerator discs, causing the aeration pressure to rise. When the pressure in the gas storage chamber 1 reaches the first opening threshold, the pressure control switch 8 is opened, and the aerator 7 starts to work, increasing the blowing force on the particulate oily dirt near the multi-membrane aeration device and blowing it away from the device; at the same time, the pressure control switches 6 on the first aerator 2, the second aerator 3, the third aerator 4 and the fourth aerator 5 are all closed, so that the first aerator 2, the second aerator 3, the third aerator 4 and the fourth aerator 5 are switched to the stop working state, preventing particulate oily dirt from entering the membrane of the first aerator 2, the second aerator 3, the third aerator 4 and the fourth aerator 5 due to external pressure, causing clogging.

[0065] If particulate oily contaminants are blown away from this device, the pressure will continue to drop, reaching [a certain value]. Figure 6 When the working pressure range is shown, the pressure regulating switch 8 is closed, and the aerator 7 is switched to the stop working state. At the same time, the pressure regulating switches 6 on the first aerator 2, the second aerator 3, the third aerator 4 and the fourth aerator 5 are all opened, and the first aerator 2, the second aerator 3, the third aerator 4 and the fourth aerator 5 are all switched to the working state.

[0066] like Figure 8The diagram shows the working state of the above-mentioned working mode three: When the biogas slurry quality is poor, the dissolved oxygen in the biogas slurry treatment system is low, or the particulate oily dirt attached to the surface of the aerator cannot be effectively blown away and accumulates more and more, the gas supply volume and pressure can be increased by increasing the gas supply system, which will cause the pressure in the gas storage chamber 1 to rise continuously. When it reaches a higher set second opening threshold, the control pressure regulating switch 2 8 will be opened. At this time, aerator 2 7, first aerator 2, second aerator 3, third aerator 4 and fourth aerator 5 are all in working state to realize the compound aeration function. The large volume and mixed bubbles formed at this time will stir and oxygenate the biogas slurry, which can improve the oxygenation efficiency and achieve the purpose of rapidly increasing the dissolved oxygen in the biogas slurry to meet the oxygen demand of microorganisms under the current working conditions. Example

[0067] This embodiment proposes a multi-membrane aeration device 100 for the treatment of kitchen waste biogas slurry. Based on the first embodiment, it is also specially equipped with an air supply system. The air storage chamber 1 is connected to the air supply system through the aeration pipe 14.

[0068] In some embodiments, the air supply system includes a blower and electrical control equipment. The blower is installed in the equipment room and connected to the aforementioned aeration pipe 14 via a pipeline. The electrical control equipment is used to control the start and stop of the blower to realize the supply and cut-off of air to the air storage chamber 1. The air supply system is communicatively connected to the aforementioned control system, which can regulate the air supply volume and pressure of the air supply system to the aeration device.

[0069] In some embodiments, the aeration pipe 14 may be connected to the bottom end face or the circumferential side wall of the aforementioned cylindrical air storage tray. For example... Figures 1-4 The diagram shown is a schematic of the aeration pipe 14 connected to the bottom end face of the cylindrical air storage plate. Example

[0070] This embodiment proposes an aeration system for treating kitchen waste biogas slurry, mainly used for biochemical treatment of biogas slurry. It includes an aeration tank and a multi-membrane aeration device 100 for treating kitchen waste biogas slurry disclosed in Embodiment 1 or 2. The aeration tank is used to store kitchen waste biogas slurry to be treated. The multi-membrane aeration device 100 for treating kitchen waste biogas slurry is fixed to the bottom of the aeration tank by fixing toe 13. When in use, the entire multi-membrane aeration device 100 for treating kitchen waste biogas slurry is immersed in kitchen waste biogas slurry.

[0071] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A multi-membrane aeration device applied to kitchen biogas slurry treatment, characterized in that, include: An air storage chamber (1) is used to connect an external air supply system, which is used to supply air to the air storage chamber (1); An aerator group is disposed on the air storage chamber (1). The aerator group includes multiple aerators, and the apertures of the aeration holes of all the aerators are not completely the same or completely different. The air inlet of any aerator is connected to the air storage chamber (1) through a pressure control switch. The pressure control switch can control the connection or disconnection between the aerator and the air storage chamber (1).

2. The multi-film aerator for treatment of kitchen biogas slurry according to claim 1, wherein The aerator assembly includes: Aerator 1 is installed on the air storage chamber (1), and the air inlet of aerator 1 is connected to the air storage chamber (1) through pressure control switch 1 (6). Aerator 2 (7) is installed on the air storage chamber (1), and the air inlet of the aerator 2 (7) is connected to the air storage chamber (1) through pressure control switch 2 (8); The aeration hole diameter of the second aerator (7) is larger than that of the first aerator.

3. The multi-film aerator for treatment of kitchen biogas slurry according to claim 2, wherein One aerator (7) is provided and is located at the center of the air storage chamber (1); multiple aerators are provided and are evenly distributed on the outer periphery of the aerator (7).

4. The multi-film aeration device for kitchen biogas slurry treatment according to claim 2 or 3, characterized in that, The aeration hole diameter of the aerator one is 0.01mm to 0.05mm; the aeration hole diameter of the aerator two (7) is 0.05mm to 0.10mm.

5. The multi-film aeration device for kitchen biogas slurry treatment according to any one of claims 1 to 3, characterized in that, Each of the aerators includes an air-venting base (9), a diaphragm (10), and a fastening ring (11). An airflow channel is provided inside the air-venting base (9). The diaphragm (10) covers the air outlet of the air-venting base (9) and is fixed to the air outlet of the air-venting base (9) by the fastening ring (11). The aeration holes are opened on the diaphragm (10). The air inlet of the air-venting base extends into the air storage chamber (1) and is connected to the corresponding pressure control switch.

6. The multi-film aerator for treatment of kitchen biogas slurry according to claim 5, wherein The membrane (10) is an oleophobic polymer membrane resistant to microbial corrosion.

7. The multi-film aeration device for kitchen biogas slurry treatment according to any one of claims 1 to 3, characterized in that, The air storage chamber (1) is a columnar air storage plate. The aerator group is set at one axial end of the columnar air storage plate. Multiple support legs (12) are set at the other axial end of the columnar air storage plate. A fixed toe (13) is set at the bottom end of any one of the support legs (12). The fixed toe (13) is used to fix it to the bottom of the aeration tank.

8. The multi-membrane aeration device for treating kitchen waste biogas slurry according to any one of claims 1 to 3, characterized in that, It also includes a control system, which is communicatively connected to any one of the pressure regulating switches to control the opening and closing of the pressure regulating switches.

9. The multi-film aeration device for kitchen biogas slurry treatment according to any one of claims 1 to 3, characterized in that, It also includes an air supply system, and the air storage chamber (1) is connected to the air supply system through an aeration pipe (14).

10. An aeration system applied to kitchen biogas slurry treatment, characterized by, The device includes an aeration tank and a multi-membrane aeration device (100) for treating kitchen waste biogas slurry as described in any one of claims 1 to 9. The aeration tank is used to store kitchen waste biogas slurry to be treated, and the multi-membrane aeration device (100) for treating kitchen waste biogas slurry is fixed to the bottom of the aeration tank.

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