Device for comprehensively improving anaerobic methane production efficiency of wet garbage

Abstract

The utility model provides a device for comprehensively improving the anaerobic methane production efficiency of wet garbage, which comprises an anaerobic jar, a gas-liquid mixing jet stirring assembly is arranged at the bottom of the tank body of the anaerobic jar, the gas-liquid mixing jet stirring assembly can push the biogas slurry in the tank to flow and mix along a certain direction, and meanwhile, due to the rising of small bubbles of the biogas, the gas-liquid mixing jet stirring assembly can stir the biogas slurry in the tank. The biogas in the tank is driven to be fully mixed and stirred in the vertical direction; the deslagging mechanism is mounted at the bottom of the tank body of the anaerobic tank and is used for treating sediment at the bottom of the anaerobic tank, improving bottom stirring and water distribution effects and preventing a local acidification phenomenon; and the trace element compound solution adding mechanism is connected to the gas-liquid mixing jet stirring assembly and is used for spraying a trace element compound solution into the anaerobic tank through the gas-liquid mixing jet stirring assembly. The problems of insufficient stirring process, easiness in sand accumulation, scum crusting and high operation energy consumption in the prior art are solved.

Description

Technical Field

[0001] This application belongs to the field of kitchen wastewater treatment technology, and more specifically, it relates to a device for comprehensively improving the efficiency of anaerobic biogas production from wet waste. Background Technology

[0002] Anaerobic fermentation is an important technology for treating kitchen waste wastewater. It uses anaerobic microorganisms to convert organic matter into biogas, thereby achieving the resource utilization of wastewater. Biogas production efficiency is a crucial indicator of anaerobic digester performance, and many factors influence this efficiency.

[0003] In anaerobic digestion, stirring increases fluid disturbance, allowing organic matter and activated sludge components to come into full contact, increasing the contact probability between substrate and microorganisms, and accelerating the anaerobic digestion process. Therefore, the adequacy of stirring is one of the core factors affecting biogas production efficiency. Currently, mechanical stirring is commonly used to achieve disturbance in the anaerobic digester, but it also has drawbacks such as insufficient stirring, easy sand accumulation, scum crusting, and high operating energy consumption. There is an urgent need to develop a new stirring technology to replace traditional mechanical stirring and enhance the thorough mixing of materials in the anaerobic digester.

[0004] Meanwhile, as the anaerobic digester operates, sediment gradually accumulates at the bottom. This not only interferes with the normal operation of the bottom mixing device, reducing the mixing effect and making it difficult for the substances inside the digester to be fully and evenly mixed, but also seriously hinders the water distribution system. Due to the presence of sediment, the uniformity of water distribution through the inlet pipe is disrupted, leading to excessively high substrate concentrations in localized areas. Microorganisms are unable to metabolize and transform this substrate in a timely manner, causing localized acidification, and even...

[0005] This leads to overall acidification of the anaerobic digester, severely impacting the stability and processing efficiency of the anaerobic system. Therefore, the issue of bottom sediment must be given high priority, and appropriate effective measures must be taken to address it to ensure the normal and stable operation of the anaerobic digester.

[0006] On the other hand, the anaerobic biogas production process involves the synergistic effects of various anaerobic microorganisms (hydrolytic bacteria, acid-producing bacteria, methanogens, etc.), and the activity of these microorganisms directly affects biogas production efficiency and quality. A lack of essential trace elements can significantly reduce the metabolic activity of anaerobic microorganisms, thereby affecting the processing performance. Studies have shown that trace elements such as Fe, Co, W, Mo, and Se play irreplaceable roles in enzymatic synthesis and signal transduction. Some fermentation substrates have low trace element content, insufficient to support microbial metabolism and maintain an effective anaerobic process. Therefore, supplementing with trace elements is also essential for improving anaerobic digestion performance. Summary of the Invention

[0007] The purpose of this application is to provide a device for comprehensively improving the efficiency of anaerobic digestion of wet waste, and to solve the problem that the commonly used mechanical stirring process can achieve disturbance in the anaerobic digester, but the stirring process also has its limitations.

[0008] Problems include insufficient processing, easy accumulation of sand, scum crusting, and high energy consumption during operation.

[0009] To achieve the above objectives, the technical solution adopted in this application is: a device for comprehensively improving the efficiency of anaerobic biogas production from wet waste, comprising:

[0010] The anaerobic tank is equipped with a gas-liquid mixing jet stirring component at the bottom of the tank body. The gas-liquid mixing jet stirring component can promote the flow and mixing of biogas liquid in the tank in a certain direction, and at the same time, the rising of the microbubbles of biogas generated can also drive the biogas in the tank to achieve full mixing in the vertical direction.

[0011] The sludge discharge mechanism is installed at the bottom of the anaerobic tank. The sludge discharge mechanism is used to treat the sludge at the bottom of the anaerobic tank, improve the bottom stirring and water distribution effect, and prevent local acidification.

[0012] The trace element compound solution dosing mechanism is connected to the gas-liquid mixing jet stirring assembly, which sprays the trace element compound solution into the anaerobic tank through the gas-liquid mixing jet stirring assembly.

[0013] Preferably, the gas-liquid mixing jet stirring assembly includes:

[0014] The biogas slurry inlet pipe is connected to the anaerobic tank;

[0015] A circulating cutting pump is connected to the biogas slurry inlet pipe;

[0016] The Venturi pipe mixer is connected to the circulating cutter pump via a biogas slurry outlet pipe;

[0017] The biogas pipeline is connected at one end to the Venturi pipe mixer and at the other end to the top of the anaerobic tank.

[0018] An annular diversion pipe is fitted onto the anaerobic tank and connected to the Venturi pipe mixer. Multiple diversion ports are evenly distributed on the annular diversion pipe.

[0019] A jet nozzle is fixedly connected to the diversion port, and the jet nozzle penetrates the side wall of the anaerobic tank.

[0020] Preferably, the number of jet nozzles is six. The six jet nozzles are installed at the same height on the inner wall of the anaerobic tank near the bottom of the tank, and the center line of the nozzle orifice is set at an angle to the inner wall of the tank. This is used to make the biogas slurry flow at the bottom of the tank to form a circulation and drive the bottom sludge to flow, so as to prevent sludge deposition.

[0021] Preferably, the angle is 30°.

[0022] Preferably, a frustum-shaped support is provided at the center of the bottom of the tank.

[0023] Preferably, the bottom of the tank is provided with a plurality of grooves, which are evenly distributed on the bottom of the tank, and each groove is equipped with a slag discharge mechanism.

[0024] Preferably, the slag discharge mechanism includes:

[0025] A guide channel is installed in the groove and extends through the bottom of the tank body; the guide channel has a slag discharge port; a slag discharge motor is installed on the guide channel.

[0026] The spiral shaft is connected to the slag discharge motor;

[0027] Helical blades are mounted on the helical shaft;

[0028] An electric gate valve is installed on the slag discharge port.

[0029] Preferably, the trace element compound solution dosing mechanism includes:

[0030] A trace element compound solution storage tank, wherein a stirring motor is installed on the top of the trace element compound solution storage tank, and a stirring mechanism is installed inside the tank, the stirring mechanism being connected to the stirring motor;

[0031] A trace element compound solution dosing pipeline is installed between the biogas slurry outlet pipeline and the trace element compound solution storage tank.

[0032] Preferably, a dosing metering pump is also installed between the trace element compound solution storage tank and the trace element compound solution dosing pipeline.

[0033] Preferably, the trace element compound solution dosing pipeline includes:

[0034] A stainless steel pipe is welded to the biogas slurry inlet pipe.

[0035] A PE plastic pipe passes through the stainless steel pipe and extends into the biogas slurry inlet pipe. The PE plastic pipe is also equipped with a ball valve.

[0036] The beneficial effects of the device for comprehensively improving the biogas production efficiency of wet waste provided in this application are as follows:

[0037] 1. Compared with the prior art, the advantages of this utility model are: the technical solution of this utility model uses gas-liquid mixing jet stirring to enhance the mixing of materials in the anaerobic tank, while optimizing the bottom slag discharge system and quantitatively supplementing trace elements, continuously improving the activity of anaerobic microorganisms, and comprehensively improving the anaerobic biogas production efficiency of wet waste. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings in the following description are only...

[0039] These are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0040] Figure 1 is a three-dimensional structural schematic diagram of a device for comprehensively improving the anaerobic biogas production efficiency of wet waste provided in an embodiment of this application;

[0041] Figure 2 is an enlarged structural schematic diagram of A in Figure 1 provided in an embodiment of this application;

[0042] Figure 3 is a cross-sectional structural diagram provided in an embodiment of this application;

[0043] Figure 4 is a top sectional view of the structure provided in an embodiment of this application;

[0044] Figure 5 shows an embodiment of this application. Figure 4 A magnified structural diagram of B in the middle;

[0045] Figure 6 is a schematic diagram of the slag discharge mechanism provided in an embodiment of this application;

[0046] Figure 7 is a schematic diagram of the structure of the trace element compound solution dosing pipeline provided in the embodiment of this application.

[0047] The following are the labeling elements in the figure:

[0048] 1. Anaerobic tank; 101. Bottom of the tank; 102. Frustum-shaped support;

[0049] 2. Slag discharge mechanism; 201. Guide channel; 202. Slag discharge port; 203. Slag discharge motor; 204. Spiral shaft; 205. Spiral blades; 206. Electric gate valve;

[0050] 3. Trace element compound solution dosing mechanism; 301. Trace element compound solution storage tank; 302. Stirring motor; 303. Stainless steel pipe; 304. PE plastic pipe; 305. Ball valve; 306. Dosing metering pump;

[0051] 4. Biogas slurry inlet pipe; 5. Venturi pipe mixer; 6. Biogas pipe; 7. Circular diversion pipe;

[0052] 8. Biogas slurry outlet pipe; 9. Jet nozzle; 10. Circulating cutting pump. Detailed Implementation

[0053] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0054] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to"...

[0055] "Connected to" another element, which can be directly connected to another element or indirectly connected to that other element.

[0056] It should be understood that the terms "length," "width," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0057] The fact that it is constructed and operated in a specific orientation should not be construed as a limitation of this application.

[0058] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] Please refer to Figures 1 to 6 together. The following is a description of a device for comprehensively improving the anaerobic biogas production efficiency of wet waste provided by the embodiments of this application.

[0060] A device for comprehensively improving the efficiency of anaerobic digestion of wet waste includes an anaerobic tank 1, a slag discharge mechanism 2, and a trace element compound solution dosing mechanism 3.

[0061] Specifically, the bottom 101 of the anaerobic tank 1 is equipped with a gas-liquid mixing jet stirring assembly.

[0062] The gas-liquid mixing jet agitator can drive the biogas slurry in the tank to flow and mix in a certain direction. Simultaneously, due to the rising of microbubbles of biogas, the biogas in the tank can also be fully mixed and stirred in the vertical direction. Specifically, the gas-liquid mixing jet agitator includes: a biogas slurry inlet pipe 4, which is connected to the anaerobic tank 1 and used to transport the biogas slurry to the circulating cutting pump 10. After pressurization, the biogas slurry is sprayed into the anaerobic tank 1 to drive the biogas slurry in the tank to flow and mix in a certain direction. Further, the biogas slurry inlet pipe 4 is preferably connected to the middle of the anaerobic tank 1. The inlet of the circulating cutting pump 10 is connected to the other end of the biogas slurry inlet pipe 4; the Venturi pipe mixer 5 is connected to the outlet of the circulating cutting pump 10 through the biogas slurry outlet pipe 8; the biogas pipe 6 is connected at one end to the Venturi pipe mixer 5 and at the other end to the top of the anaerobic tank 1. Through the action of the circulating cutting pump 10, a negative pressure is generated in the Venturi pipe mixer 5, and the biogas pipe 6 transports the biogas from the top of the anaerobic pipe to the Venturi pipe mixer 5, mixes it with the biogas slurry, and sprays it into the anaerobic tank 1. In the anaerobic tank 1, tiny biogas bubbles are generated inside and float to the surface, further improving the stirring effect of the biogas slurry. An annular diversion pipe 7 is fitted onto the anaerobic tank 1 near the bottom and communicates with the Venturi pipe mixer 5. Multiple diversion ports are evenly distributed on the annular diversion pipe 7. A jet nozzle 9 is fixedly connected to the diversion ports, penetrating the side wall of the anaerobic tank 1 and extending into the tank. The number of jet nozzles 9 matches the number of diversion ports. More specifically, there are six jet nozzles 9, installed at the same height on the inner wall of the anaerobic tank 1 near the bottom 101, with the center line of the nozzle orifice at an angle to the inner wall of the tank, preferably 30°. This is used to create a circulating flow of biogas slurry at the bottom 101 of the tank, and to drive the flow of sludge at the bottom, preventing sludge deposition.

[0063] The sludge discharge mechanism 2 is installed at the bottom 101 of the anaerobic tank 1. The sludge discharge mechanism 2 is used to treat the sludge at the bottom of the anaerobic tank, improve bottom stirring and water distribution, and prevent localized acidification. A frustum-shaped support 102 protrudes from the center of the bottom 101 of the tank body to prevent sludge from depositing at the center of the bottom 101, and also facilitates the sliding of sludge on the frustum-shaped support 102 down to the bottom 101 of the tank body. The bottom 101 of the tank body has multiple grooves evenly distributed, and each groove is equipped with a sludge discharge mechanism 2. The number of sludge discharge mechanisms 2 is the same as the number of jet nozzles 9, and their installation positions are close to the jet nozzles 9. Specifically, the slag discharge mechanism 2 includes: a guide channel 201, which is installed in the groove and penetrates the bottom 101 of the tank body, and has a slag discharge port 202; a slag discharge motor 203, which is installed on the guide channel 201; a spiral shaft 204, which is fixedly connected to the output shaft of the slag discharge machine 203; spiral blades 205, which are installed on the spiral shaft 204; and an electric gate valve 206, which is installed on the slag discharge port 202. A trace element compound solution dosing mechanism 3 is connected to the gas-liquid mixing jet stirring assembly, which sprays the trace element compound solution into the anaerobic tank 1 through the gas-liquid mixing jet stirring assembly. Specifically, the trace element compound solution dosing mechanism 3 includes: a trace element compound solution storage tank 301, a stirring motor 302 installed on the top of the trace element compound solution storage tank 301, a stirring mechanism installed inside the tank 301, the stirring mechanism being connected to the stirring motor 302, and the trace element compound solution storage tank 301 containing a trace element compound solution; its components are FeCl3 and a trace element compound nutrient salt solution (containing trace elements Co, Se, W, and Mo), wherein the concentration of the FeCl3 solution is 15~20 mg / L, the concentration of the trace element compound nutrient salt solution is 50~60 mg / L, and the trace element compound solution is stirred by the stirring motor 302 and the stirring mechanism. A trace element compound solution dosing pipe is also included, located between the biogas slurry outlet pipe 8 and the trace element compound solution storage tank 301.Specifically, the trace element compound solution dosing pipeline includes: a stainless steel pipe 303, which is welded to the biogas slurry outlet pipeline 8 near the outlet of the circulating cutting pump 10; and a PE plastic pipe 304, which passes through the stainless steel pipe 303 and extends into the biogas slurry outlet pipeline 8. The PE plastic pipe 304 is also equipped with a ball valve 305 to control the opening or closing of the trace element compound solution dosing pipeline. A dosing metering pump 306 is also installed between the trace element compound solution storage tank 301 and the trace element compound solution dosing pipeline to achieve automatic dosing of trace elements.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for comprehensively improving the efficiency of anaerobic biogas production of wet garbage, characterized in that, The application relates to an anaerobic tank, which comprises the following parts: an anaerobic tank body, a gas-liquid mixed jet flow stirring assembly arranged at the bottom of the tank body, a sludge discharging mechanism arranged at the bottom of the tank body, and a trace element compound solution adding mechanism connected to the gas-liquid mixed jet flow stirring assembly. The gas-liquid mixed jet flow stirring assembly comprises the following parts: a biogas slurry inlet pipeline connected to the anaerobic tank body, a circulating cutting pump connected to the biogas slurry inlet pipeline, a Venturi pipeline mixer connected to the circulating cutting pump through a biogas slurry outlet pipeline, a biogas pipeline connected to the Venturi pipeline mixer at one end and connected to the top of the anaerobic tank body at the other end, a ring-shaped shunt pipeline sleeved on the anaerobic tank body and connected to the Venturi pipeline mixer, a plurality of shunt openings uniformly distributed on the ring-shaped shunt pipeline, and jet nozzles fixedly connected to the shunt openings and penetrating the side wall of the anaerobic tank body. The number of the jet nozzles is six, the six jet nozzles are arranged on the inner wall of the tank body near the bottom of the tank body at the same height, and the center line of the jet nozzle nozzle is arranged at an angle with the inner wall of the tank body, so that the biogas slurry is circulated at the bottom of the tank body and the sludge at the bottom is circulated to prevent the sludge from depositing. The angle is 30 DEG.

2. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 1, characterized in that, A circular table bearing is arranged at the center of the bottom of the tank body. A plurality of grooves are arranged on the bottom of the tank body, the grooves are uniformly distributed on the bottom of the tank body, and a sludge discharging mechanism is arranged in each groove. The sludge discharging mechanism comprises a guide groove arranged in the groove and penetrating the bottom of the tank body, a sludge discharging motor arranged on the guide groove, a spiral shaft connected to the sludge discharging motor, a spiral blade arranged on the spiral shaft, and an electric gate valve arranged on the sludge discharging opening. The trace element compound solution adding mechanism comprises a trace element compound solution storage tank, a stirring motor arranged on the top of the trace element compound solution storage tank, a stirring mechanism arranged in the tank body of the trace element compound solution storage tank and connected to the stirring motor, and a trace element compound solution adding pipeline arranged between the biogas slurry outlet pipeline and the trace element compound solution storage tank. A dosing metering pump is further arranged between the trace element compound solution storage tank and the trace element compound solution adding pipeline. The trace element compound solution adding pipeline comprises a stainless steel pipe welded on the biogas slurry inlet pipeline and a PE plastic pipe penetrating the stainless steel pipe and extending into the biogas slurry inlet pipeline, and the PE plastic pipe is further provided with a ball valve. ​ 3. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 2, characterized in that, ​ 4. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 3, characterized in that, ​ 5. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 4, characterized in that: ​ 6. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 5, characterized in that: ​ 7. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 6, characterized in that, ​ ​ ​ ​ ​ 8. The device for improving the efficiency of anaerobic biogas production from wet garbage according to any one of claims 2 to 7, characterized in that: ​ ​ ​ 9. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 8, characterized in that: ​ 10. The device for improving the efficiency of anaerobic biogas production from wet garbage according to claim 8, characterized in that: ​ ​ ​

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