Anaerobic fermentation device for kitchen waste

Abstract

The utility model discloses a kind of kitchen waste anaerobic fermentation devices. Including: stirring subassembly, stirring subassembly includes stirring unit, tank unit;Stirring unit includes power output module and stirring module;Stirring module includes shaft, spiral stirring paddle, multiple filter holes;Spiral stirring paddle is fixedly connected with shaft;Spiral stirring paddle is spirally arranged along the axial direction of shaft;Filter hole is through the two end surfaces of spiral stirring paddle along the axial direction of shaft;The one end of shaft along its axial direction is connected with the output end of power output module;The fixed end of power output module is connected with the upper end of tank unit in vertical direction;Spiral stirring paddle is located in tank unit, and is spaced apart from tank unit;Heating assembly, the input end of heating assembly is communicated with tank unit;Fermentation subassembly, the input end of fermentation subassembly is communicated with the output end of heating assembly. Thus it has solved the problem that hard material possibly contained in existing kitchen waste affects kitchen waste fermentation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen waste fermentation, specifically, it relates to an anaerobic fermentation device for kitchen waste. Background Technology

[0002] Anaerobic fermentation of food waste refers to a biochemical process that utilizes a variety of microbial communities to decompose the organic macromolecules in food waste under anaerobic conditions, ultimately producing biogas (mainly containing methane, a renewable energy source) and digestate (which can be used as organic fertilizer after treatment). Before anaerobic fermentation, food waste typically needs to be stirred and crushed, followed by fermentation. Most existing food waste fermentation devices directly transport the crushed food waste into the fermentation tank. However, because food waste may contain hard, large particles such as bones or sand, these particles are difficult to crush and decompose, and in some cases may enter the fermentation tank along with the food waste, thus affecting fermentation efficiency. Utility Model Content

[0003] To address the problem that existing kitchen waste may contain hard materials that affect its fermentation efficiency, this utility model provides an anaerobic fermentation device for kitchen waste, comprising: A stirring assembly includes a stirring unit and a tank unit. The stirring unit includes a power output module and a stirring module. The stirring module includes a rotating shaft, a spiral stirring paddle, and multiple filter holes. The spiral stirring paddle is fixedly connected to the rotating shaft. The spiral stirring paddle is spirally arranged along the axial direction of the rotating shaft. The filter holes penetrate both ends of the spiral stirring paddle along the axial direction of the rotating shaft. One end of the rotating shaft along its axial direction is connected to the output end of the power output module. The fixed end of the power output module is connected to the upper vertical end of the tank unit. The spiral stirring paddle is located inside the tank unit and is spaced apart from the tank unit. A heating assembly, the input end of which is connected to the tank unit; A fermentation component, wherein the input end of the fermentation component is connected to the output end of the heating component.

[0004] In some embodiments, the stirring unit further includes a plurality of vertical stirring blades; the vertical stirring blades are fixedly connected to the end face of the spiral stirring blade along the axial direction of the rotating shaft; the vertical stirring blades are spaced apart from the filter holes.

[0005] In some embodiments, the tank unit includes a stirring tank, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fermentation material input pipe, a diluent input pipe, a fermentation material output pipe, and an impurity output pipe; the fermentation material input pipe and the diluent input pipe are respectively connected to the upper end of the stirring tank; the diluent output pipe and the impurity output pipe are respectively connected to the lower end of the stirring tank; the fermentation material output pipe is located between the fermentation material input pipe and the fermentation material input pipe; the fixed end of the power output module is connected to the upper end of the stirring tank; the first solenoid valve is connected to the fermentation material input pipe; the second solenoid valve is connected to the diluent input pipe; the third solenoid valve is connected to the fermentation material output pipe; the fourth solenoid valve is connected to the impurity output pipe; the spiral agitator is located inside the stirring tank; the spiral agitator is spaced apart from the stirring tank; the end of the fermentation material output pipe away from the stirring tank is connected to the heating assembly.

[0006] In some embodiments, the stirring assembly further includes a filter cover; the filter cover is a blind tube with one end open and the other end closed; a plurality of partition holes are provided on the closed end of the filter cover; the outer peripheral surface of the filter cover abuts against the inner peripheral surface of the fermentation material output pipe; the partition holes are spaced apart from the spiral stirring paddle.

[0007] In some embodiments, the diameter of the barrier hole is less than or equal to the diameter of the filter hole.

[0008] In some embodiments, the heating assembly includes a shell-and-tube heat exchanger, a heating liquid inlet pipe, a cooling liquid outlet pipe, and a material pump; the inlet of the material pump is connected to the end of the fermentation material outlet pipe away from the stirred tank; the outlet of the material pump is connected to the tube-side fluid inlet of the shell-and-tube heat exchanger; the tube-side fluid outlet of the shell-and-tube heat exchanger is connected to the fermentation assembly; the heating liquid inlet pipe is connected to the shell-side fluid inlet of the shell-and-tube heat exchanger; and the cooling liquid outlet pipe is connected to the shell-side fluid outlet of the shell-and-tube heat exchanger.

[0009] In some embodiments, the diameter of the filter holes is uniformly distributed from top to bottom on the spiral impeller along the axial direction of the rotating shaft.

[0010] To address the problem that existing kitchen waste may contain hard materials that affect its fermentation efficiency, this utility model has the following advantages: By setting up a spiral agitator with multiple filter holes, the kitchen waste can be agitated as the agitator rotates, and the filter holes can also filter out hard, large particles, thereby improving the subsequent fermentation efficiency of the kitchen waste to a certain extent. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of an anaerobic fermentation device for kitchen waste in some embodiments; Figure 2 This is a schematic diagram of the overall structure of an anaerobic fermentation device for kitchen waste in some embodiments; Figure 3 This is a schematic diagram of the stirring assembly. Figure 4 for Figure 3 Partial diagram of the explosion; Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0012] In the diagram: 100-Stirring assembly; 110-Tank unit; 111-Stirring tank; 112-Fermentation material input pipe; 113-Dilution liquid input pipe; 114-Fermentation material output pipe; 115-Impurity output pipe; 116-First solenoid valve; 117-Second solenoid valve; 118-Third solenoid valve; 119-Fourth solenoid valve; 120-Stirring unit; 121-Power output module; 122-Rotating shaft; 123-Helical agitator; 124-Vertical agitator; 125-Filter hole; 130-Filter cover; 200-Heating assembly; 210-Tube heat exchanger; 220-Heating liquid input pipe; 230-Cooling liquid output pipe; 240-Feed pump; 300-Fermentation assembly. Detailed Implementation

[0013] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0014] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0015] This embodiment discloses an anaerobic fermentation device for kitchen waste, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it may include: A stirring assembly 100 includes a stirring unit 120 and a tank unit 110. The stirring unit 120 includes a power output module 121 and a stirring module. The stirring module includes a rotating shaft 122, a spiral stirring paddle 123, and multiple filter holes 125. The spiral stirring paddle 123 is fixedly connected to the rotating shaft 122. The spiral stirring paddle 123 is spirally arranged along the axial direction of the rotating shaft 122. The filter holes 125 penetrate both ends of the spiral stirring paddle 123 along the axial direction of the rotating shaft 122. One end of the rotating shaft 122 along its axial direction is connected to the output end of the power output module 121. The fixed end of the power output module 121 is connected to the upper vertical end of the tank unit 110. The spiral stirring paddle 123 is located inside the tank unit 110 and is spaced apart from the tank unit 110. Heating component 200, the input end of which is connected to the tank unit 110; Fermentation component 300, the input end of which is connected to the output end of heating component 200.

[0016] In this embodiment, by setting a spiral stirring paddle 123 and providing multiple filter holes 125 on the spiral stirring paddle 123, the kitchen waste can be stirred during rotation of the spiral stirring paddle 123, and the filter holes 125 can also filter the kitchen waste, removing hard, large particles, thereby improving the subsequent fermentation efficiency of the kitchen waste to a certain extent. In this embodiment, the size and number of filter holes 125 can be set according to actual needs, while ensuring the stirring effect of the spiral stirring paddle 123 on the kitchen waste is met. It can also filter out hard, large particles from food waste. In this embodiment, it can be imagined that due to the rotation of the spiral agitator 123, the fine particles in the food waste can flow through the filter holes 125, while the hard, large particles, because their diameter is larger than the diameter of the filter holes 125, cannot pass through the filter holes 125 and will be filtered out. The hard, large particles will eventually collect at the bottom of the tank unit 110. In this embodiment, the fermentation assembly 300 includes a fermentation tank and a stirring mechanism for stirring the food waste inside the fermentation tank, as well as a pipe for venting exhaust. The pipes used for sewage discharge, given that the fermentation component 300 is a conventional technology in this field, will have their structure further described in this embodiment. In this embodiment, the power output module 121 includes a stirring motor or a combination of a stirring motor and a reducer. It can be imagined that when the power output module 121 is a stirring motor, the fixed end of the stirring motor is connected to the tank unit 110, and the output end is connected to the rotating shaft 122. When the power output module 121 is a combination of a stirring motor and a reducer, the output end of the reducer is connected to the rotating shaft 122, and the fixed end of the reducer is connected to the tank unit 110. It should be further noted that the control devices for controlling the power output module 121 and other electrical appliances are not further described in this embodiment. However, those skilled in the art can imagine that the anaerobic fermentation device for kitchen waste described in this embodiment should be electrically connected to the control devices for controlling the operation of the power output module 121 and other electrical equipment. The control device can be a PLC controller or other existing conventional control devices that can be applied to the scenario of the anaerobic fermentation device for kitchen waste described in this utility model.

[0017] In some embodiments, such as Figure 4 As shown, the stirring unit 120 also includes a plurality of vertical stirring blades 124; the vertical stirring blades 124 are fixedly connected to the end face of the spiral stirring blade 123 along the axial direction of the rotating shaft 122; the vertical stirring blades 124 are spaced apart from the filter holes 125.

[0018] In this embodiment, by setting multiple vertical stirring paddles 124, the kitchen waste in the tank unit 110 can be stirred more thoroughly, thereby accelerating the filtration of hard large particles in the kitchen waste by the spiral stirring paddle 123 to a certain extent.

[0019] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the tank unit 110 includes a stirring tank 111, a first solenoid valve 116, a second solenoid valve 117, a third solenoid valve 118, a fourth solenoid valve 119, a fermentation material input pipe 112, a diluent input pipe 113, a fermentation material output pipe 114, and an impurity output pipe 115. The fermentation material input pipe 112 and the diluent input pipe 113 are respectively connected to the upper end of the stirring tank 111; the diluent output pipe and the impurity output pipe are respectively connected to the lower end of the stirring tank 111; the fermentation material output pipe 114 is located between the fermentation material input pipe 112 and the fermentation material input pipe 115. The fixed end of the power output module 121 is connected to the upper end of the mixing tank 111; the first solenoid valve 116 is connected to the fermentation material input pipe 112; the second solenoid valve 117 is connected to the diluent input pipe 113; the third solenoid valve 118 is connected to the fermentation material output pipe 114; the fourth solenoid valve 119 is connected to the impurity output pipe 115; the spiral agitator 123 is located inside the mixing tank 111; the spiral agitator 123 is spaced apart from the mixing tank 111; the end of the fermentation material output pipe 114 away from the mixing tank 111 is connected to the heating component 200.

[0020] In this embodiment, those skilled in the art should realize that the first solenoid valve 116, the second solenoid valve 117, the third solenoid valve 118, and the fourth solenoid valve 119 are electrically connected to the aforementioned control device, thereby enabling the control device to control the first solenoid valve 116, the second solenoid valve 117, the third solenoid valve 118, and the fourth solenoid valve 119. In this embodiment, it is conceivable that controlling the opening of the first solenoid valve 116 by the control device can transport a predetermined amount of kitchen waste from the fermentation input pipe to the mixing tank 111; while opening the second solenoid valve 117 can transport the diluent from the diluent input pipe 113 to the mixing tank 111. In this embodiment, the liquid in the diluent input pipe 113 can be sterile water at a uniform temperature or an aqueous solution containing a predetermined amount of anaerobic fermentation bacteria. It is conceivable that when the kitchen waste in the fermentation input pipe has a high viscosity, it may affect the fermentation rate or the transport rate of the kitchen waste. In order to improve the fermentation rate and the transport rate of the kitchen waste, it is possible to add [something] as needed. A certain amount of diluent is added to facilitate the fermentation of kitchen waste. In this embodiment, when the hard, large particles in the mixing tank 111 accumulate to the bottom of the mixing tank 111, the fourth solenoid valve 119 can be opened to discharge the hard, large particles from the impurity output pipe 115. In some cases, a certain amount of diluent (e.g., water) can also be added to the mixing tank 111 to clean it, and the resulting waste liquid can be discharged from the impurity output pipe 115 together with the hard, large particles. In this embodiment, after the spiral agitator 123 has rotated for a certain period of time, the third solenoid valve 118 can be opened to discharge the filtered kitchen waste from the mixing tank 111. In this embodiment, an observation hole can be set at a corresponding position on the mixing tank 111. The observation hole can isolate the inside and outside of the mixing tank 111 through glass. The amount of hard, large particles in the mixing tank 111 can be observed through the observation hole. When the amount of hard, large particles reaches a certain amount, the hard, large particles can be discharged from the mixing tank 111 by opening the fourth solenoid valve 119.

[0021] In some embodiments of this utility model, such as Figure 3 , Figure 4 , Figure 5 As shown, the stirring assembly 100 also includes a filter cover 130; the filter cover 130 is a blind tube with one end open and the other end closed; a plurality of partition holes are provided on the closed end of the filter cover 130; the outer peripheral surface of the filter cover 130 abuts against the inner peripheral surface of the fermentation material output pipe 114; the partition holes are spaced apart from the spiral stirring paddle 123; the diameter of the partition holes is less than or equal to the diameter of the filter hole 125.

[0022] In this embodiment, by setting the filter cover 130, it is possible to further prevent hard, large particles in the mixing tank 111 from being transported into the heating component 200, thereby ensuring the quality of the kitchen waste transported to the heating component 200 to a certain extent.

[0023] In some embodiments of this utility model, such as Figure 1 , Figure 2 As shown, the heating assembly 200 includes a shell-and-tube heat exchanger 210, a heating liquid inlet pipe 220, a cooling liquid outlet pipe 230, and a material pump; the inlet end of the material pump is connected to the end of the fermentation material outlet pipe 114 away from the stirring tank 111; the outlet end of the material pump is connected to the tube-side fluid inlet end of the shell-and-tube heat exchanger 210; the tube-side fluid outlet end of the shell-and-tube heat exchanger 210 is connected to the fermentation assembly 300; the heating liquid inlet pipe 220 is connected to the shell-side fluid inlet end of the shell-and-tube heat exchanger 210; and the cooling liquid outlet pipe 230 is connected to the shell-side fluid outlet end of the shell-and-tube heat exchanger 210.

[0024] In this embodiment, the shell-and-tube heat exchanger 210 is a conventional technology application, therefore, the structure of the shell-and-tube heat exchanger 210 is not described in detail in this embodiment. In this embodiment, when the filtered kitchen waste is pumped from the mixing tank 111 to the shell-and-tube heat exchanger 210, the heating liquid transported in the heating liquid inlet pipe 220 can heat the kitchen waste, and the cooled heating liquid can be discharged from the cooling liquid outlet pipe 230. The heated kitchen waste then enters the fermentation assembly 300 for fermentation. In this embodiment, a corresponding solenoid valve (not shown in the figure) can also be installed on the pipe connecting the fermentation assembly 300 and the shell-and-tube heat exchanger 210 as needed, so that the solenoid valve can be closed during the fermentation process of the kitchen waste in the fermentation assembly 300, further improving the airtightness of the kitchen waste fermentation. In this embodiment, the connection of the corresponding pipe can be made by flange. Figure 4 and Figure 5 As shown, the flange at this location can be opened for installation of the filter cover 130, and a corresponding slot can be set in the fermentation material output pipe 114. A corresponding locking block can be set on the filter cover 130, and the locking block can be engaged in the slot to fix the filter cover 130.

[0025] In some embodiments of this utility model, the diameter of the filter hole 125 is uniformly arranged from top to bottom on the spiral stirring paddle 123 along the axial direction of the rotating shaft 122.

[0026] The working principle of this utility model is as follows: The first solenoid valve 116 and the second solenoid valve 117 are opened to deliver a predetermined amount of kitchen waste and diluent into the mixing tank 111. Then, the power output module 121 is turned on to drive the rotation of the spiral agitator 123. The spiral agitator 123 agitates and filters the kitchen waste, collecting hard, large particles in the mixing tank 111 to the bottom of the mixing tank 111. When the spiral agitator 123 has rotated for a predetermined time, the third solenoid valve 118 and the feed pump 240 are opened to deliver the filtered kitchen waste in the mixing tank 111 to the shell-and-tube heat exchanger 210 for heating, and then to the fermentation component 300 for fermentation.

[0027] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this disclosure.

Claims

1. An anaerobic fermentation device for kitchen waste, characterized in that, include: A stirring assembly includes a stirring unit and a tank unit. The stirring unit includes a power output module and a stirring module. The stirring module includes a rotating shaft, a spiral stirring paddle, and multiple filter holes. The spiral stirring paddle is fixedly connected to the rotating shaft. The spiral stirring paddle is spirally arranged along the axial direction of the rotating shaft. The filter holes penetrate both ends of the spiral stirring paddle along the axial direction of the rotating shaft. One end of the rotating shaft along its axial direction is connected to the output end of the power output module. The fixed end of the power output module is connected to the upper vertical end of the tank unit. The spiral stirring paddle is located inside the tank unit and is spaced apart from the tank unit. A heating assembly, the input end of which is connected to the tank unit; A fermentation component, wherein the input end of the fermentation component is connected to the output end of the heating component.

2. The kitchen waste anaerobic fermentation device according to claim 1, characterized in that, The stirring unit also includes multiple vertical stirring blades; the vertical stirring blades are fixedly connected to the end face of the spiral stirring blade along the axial direction of the rotating shaft; the vertical stirring blades are spaced apart from the filter holes.

3. The kitchen waste anaerobic fermentation device according to claim 2, characterized in that, The tank unit includes a mixing tank, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fermentation material input pipe, a diluent input pipe, a fermentation material output pipe, and an impurity output pipe. The fermentation material input pipe and the diluent input pipe are respectively connected to the upper end of the mixing tank; the diluent output pipe and the impurity output pipe are respectively connected to the lower end of the mixing tank; the fermentation material output pipe is located between the fermentation material input pipe and the fermentation material input pipe; the fixed end of the power output module is connected to the upper end of the mixing tank; the first solenoid valve is connected to the fermentation material input pipe; the second solenoid valve is connected to the diluent input pipe; the third solenoid valve is connected to the fermentation material output pipe; the fourth solenoid valve is connected to the impurity output pipe; the spiral agitator is located inside the mixing tank; the spiral agitator is spaced apart from the mixing tank; the end of the fermentation material output pipe away from the mixing tank is connected to the heating component.

4. The kitchen waste anaerobic fermentation device according to claim 3, characterized in that, The stirring assembly also includes a filter cover; the filter cover is a blind tube with one end open and the other end closed; multiple baffle holes are provided on the closed end of the filter cover; the outer peripheral surface of the filter cover abuts against the inner peripheral surface of the fermentation material output pipe; the baffle holes are spaced apart from the spiral stirring paddle.

5. The kitchen waste anaerobic fermentation device according to claim 4, characterized in that, The diameter of the barrier hole is less than or equal to the diameter of the filter hole.

6. The kitchen waste anaerobic fermentation device according to claim 5, characterized in that, The heating assembly includes a shell-and-tube heat exchanger, a heating liquid inlet pipe, a cooling liquid outlet pipe, and a material pump; the inlet of the material pump is connected to the end of the fermentation material outlet pipe furthest from the stirred tank; the outlet of the material pump is connected to the tube-side fluid inlet of the shell-and-tube heat exchanger; the tube-side fluid outlet of the shell-and-tube heat exchanger is connected to the fermentation assembly; the heating liquid inlet pipe is connected to the shell-side fluid inlet of the shell-and-tube heat exchanger; and the cooling liquid outlet pipe is connected to the shell-side fluid outlet of the shell-and-tube heat exchanger.

7. The anaerobic fermentation device for kitchen waste according to claim 1, characterized in that, The diameters of the filtering holes are uniformly arranged on the spiral stirring paddle along the axial direction of the rotating shaft from top to bottom.

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