Kitchen waste multi-heat source drying and stirring device and method

Abstract

This invention discloses a multi-heat-source drying and mixing device for kitchen waste, comprising a drying chamber, a heating component, a mixing and crushing component, a transmission system, a hot air circulation system, and an intelligent detection system. The drying chamber contains a drying compartment. The heating component is located within the bottom and side walls of the drying chamber. A top cover is installed at the top of the drying chamber, with a feed inlet on the top cover and a discharge outlet on one side of the drying chamber. The mixing and crushing component is installed inside the drying chamber. The transmission system and the hot air circulation system are mounted on the top cover. The transmission system drives the mixing and crushing component, and the hot air circulation system is connected to the drying chamber via an air outlet pipe. An exhaust port is located on the top cover. The intelligent detection system includes a weighing sensor, a temperature and humidity sensor, a central processing unit, and an external display. This invention also discloses a multi-heat-source drying and mixing method for kitchen waste. This application has the advantages of high drying efficiency, low operating cost, low energy consumption, and small size.

Description

Technical Field

[0001] This invention relates to the field of kitchen waste treatment machinery and equipment, and in particular to a multi-heat source drying and stirring device and method for kitchen waste. Background Technology

[0002] Second-generation food waste treatment equipment primarily employs biological decomposition methods to harmlessly treat food waste. A key step in this type of equipment is the waste mixing and drying process. Existing food waste treatment equipment mainly uses a "horizontal auger + bottom heating" method to dry the material. Heating pipes filled with hot water are arranged at the bottom of the drying chamber, forming a circulating heating system, which improves drying efficiency compared to the first-generation equipment. However, a single heat source cannot evenly heat the material in the drying chamber, resulting in a longer drying time and requiring further improvement in drying efficiency. Similar to the first-generation equipment, second-generation food waste treatment equipment also suffers from problems such as large overall size, easy material clumping, material sticking to the bottom of the drying chamber, and insufficient material crushing. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a multi-heat-source drying and mixing device and method for kitchen waste, solving problems such as high energy consumption, low operating efficiency, and ineffective elimination of odors emitted from kitchen waste in existing kitchen waste treatment equipment. This invention is used for drying, mixing, and pulverizing kitchen waste, improving the efficiency of these operations while simultaneously deodorizing the odors emitted during processing, thus broadening the applicability of kitchen waste treatment equipment and increasing public acceptance.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A multi-heat-source drying and mixing device for kitchen waste includes a drying chamber, a heating component, a mixing and crushing component, a transmission system, a hot air circulation system, and an intelligent detection system;

[0006] The drying chamber is housed within a drying chamber housing. Heating components are installed within the bottom and side walls of the drying chamber housing. A top cover is mounted on the upper end of the drying chamber housing, with a feed inlet and a ball valve installed at the feed inlet. A discharge outlet is located on one side of the drying chamber housing, with a detachable discharge door installed at the discharge outlet. A mixing and pulverizing component is installed inside the drying chamber. A transmission system and a hot air circulation system are mounted on the top cover. The transmission system drives the mixing and pulverizing component, and the hot air circulation system is connected to the drying chamber via an air outlet pipe. An exhaust port is located on the top cover.

[0007] The intelligent detection system includes a weighing sensor, a temperature and humidity sensor, a central processing unit, and an external display. The weighing sensor, temperature and humidity sensor, and external display are all connected to the central processing unit.

[0008] The bottom and side walls of the drying chamber each include an outer surface layer, a heat insulation layer, a support layer, and an inner surface layer, arranged from the outside to the inside, with the inner surface layer and the support layer spaced apart.

[0009] The heating component includes a heating oil pipe, which is located in the gap between the inner surface layer and the support layer. The oil inlet and outlet at both ends of the heating oil pipe are located on the upper cover plate. The heating oil pipe adopts a ring-shaped layered pipe arrangement and is filled with heat-conducting oil.

[0010] The mixing and pulverizing assembly includes two mixing shafts. The two ends of the mixing shafts are connected to the upper cover plate and the drying chamber body respectively through sealed bearings. Spiral blades are installed on the outer side of the mixing shafts.

[0011] The spiral blade comprises three blades, which are fixedly connected to the stirring shaft via a blade mounting seat. Each blade adopts a spiral structure, and the installation pitch of the three blades is 1.2 pitches.

[0012] The transmission system includes a drive motor connected to a frequency converter and a bevel gear reducer. The output shaft of the bevel gear reducer is fixed with a drive gear. The upper end of the stirring shaft passes through the upper cover plate and is fixedly installed with a driven gear that meshes with the drive gear.

[0013] The hot air circulation system includes a fan, a heater, an air inlet pipe, and an air outlet pipe. The air outlet of the fan is connected to the heater, which is fixedly installed on the drying chamber. The heater is connected to the upper cover plate through the air outlet pipe. The upper cover plate is provided with an air inlet that communicates with the air outlet pipe. The air inlet of the fan is connected to the air inlet pipe.

[0014] The lower end of the drying chamber is equipped with four weighing sensors, and the temperature and humidity sensors are installed inside the drying chamber.

[0015] The inner surface layer is formed by welding 316L stainless steel plate, and the outer surface layer is formed by welding 304 stainless steel plate.

[0016] A method for drying and mixing kitchen waste using multiple heat sources, employing the aforementioned multi-heat-source drying and mixing device for kitchen waste, includes the following steps:

[0017] S1: The load cell records the weight of the empty drying chamber and transmits the weight information to the central processor; the discharge gate closes, the ball valve opens, the material enters the drying chamber through the feed inlet, and then the ball valve closes; the load cell records the total weight of the material and transmits the weight information to the central processor, which displays the weight information on an external display.

[0018] S2: The heating element and hot air circulation system operate simultaneously, providing dual drying heat sources. Temperature and humidity sensors detect the temperature and humidity inside the drying chamber and transmit the data to the central processor. The central processor displays the data on an external display. When the temperature inside the drying chamber exceeds the specified value, an alarm is triggered, and the heating element and hot air circulation system stop operating. The transmission system drives the stirring and crushing element to stir and crush the material. At specified intervals, the weighing sensor transmits weight information to the central processor. The central processor compares the weight information, and when the difference between adjacent weight information values ​​is less than the specified value, the drying operation is considered complete.

[0019] S3: The heating components and hot air circulation system stop operating, while the transmission system continues to drive the mixing and crushing components. After the discharge gate is opened and the mixed and crushed material is discharged, the transmission system stops operating.

[0020] In summary, the multi-heat-source drying and mixing device and method for kitchen waste have the following beneficial effects:

[0021] 1. The arrangement of the circulating heating oil pipes is more reasonable, which makes the material heat more evenly and stably, reduces the phenomenon of material clumping and sticking, and greatly improves the drying efficiency.

[0022] 2. The integration of temperature and humidity sensors, weighing sensors, and other inspection sensors makes the material heating process more intuitive and controllable, improving the intelligence level of kitchen waste processing equipment.

[0023] 3. The hot air circulation system can not only assist in heating materials, but also remove the odor emitted by kitchen waste, facilitating subsequent deodorization treatment, saving equipment operating costs, and improving drying efficiency.

[0024] 4. The dual-shaft vertical spiral mixing shaft can improve the material mixing efficiency and realize the material conveying function, making the drying device smaller and more energy-efficient. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the multi-heat-source drying and mixing device for kitchen waste of the present invention.

[0026] Figure 2 This is a schematic diagram showing the arrangement of the heating oil pipes in this invention.

[0027] Figure 3 This is a schematic diagram of the stirring shaft structure of the present invention.

[0028] Figure 4 This is a schematic diagram of the transmission system of the present invention.

[0029] Figure 5 This is a schematic diagram of the hot air circulation system of the present invention.

[0030] Figure 6 This is a schematic diagram of the installation method of the heating oil pipe of the present invention.

[0031] Figure 7 This is a schematic diagram of the ball valve installation.

[0032] Figure 8 This is a schematic diagram of the intelligent detection system of the present invention. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0034] like Figure 1 As shown, a multi-heat-source drying and mixing device for kitchen waste includes a drying chamber 2, a heating component, a mixing and crushing component 7, a transmission system 9, a hot air circulation system 10, and an intelligent detection system.

[0035] The drying chamber 2 is equipped with a drying chamber inside; the heating components are installed in the bottom and side walls of the drying chamber 2; a top cover is installed on the upper end of the drying chamber 2, and a feed inlet is provided on the top cover. A ball valve 1 is installed at the feed inlet. A discharge port is opened on one side of the drying chamber 2, and a discharge door 3 is detachably installed at the discharge port 3; the stirring and crushing component 7 is installed inside the drying chamber; the transmission system 9 and the hot air circulation system 10 are installed on the top cover. The transmission system 9 is used to drive the stirring and crushing component to move. The hot air circulation system 10 is connected to the drying chamber through an air outlet 1004. An exhaust port 8 is opened on the top cover.

[0036] like Figure 8 The intelligent detection system includes a weighing sensor 4, a temperature and humidity sensor 5, a central processing unit, and an external display. The weighing sensor 4, the temperature and humidity sensor 5, and the external display are all connected to the central processing unit.

[0037] Specifically, the drying chamber has a double-rounded, multi-layered structure. The upper cover plate has openings for air inlets, exhaust outlets, oil inlets, oil outlets, feed inlets, and mounting holes for the stirring shaft. Lightweight design was implemented for the chamber walls, upper and lower cover plates, and other components. For example... Figure 6 The drying chamber 2 has a bottom wall and side walls comprising an outer surface layer 201, a heat insulation layer 202, a support layer 203, and an inner surface layer 204. These layers are arranged from the outside in, with the inner surface layer 204 spaced apart from the support layer 203. This design helps retain heat within the chamber, improving heat utilization efficiency. The inner surface layer 204 is made of 316L stainless steel, welded to reduce corrosion of the chamber walls by kitchen waste and improve heat transfer efficiency. The outer surface layer 201 is made of 304 stainless steel, and the surface of the drying chamber 2 is painted after welding for a cleaner and more aesthetically pleasing appearance. The support layer 203 is primarily used to install the heating oil pipes 6 of the heating components. A heat insulation layer 202 is arranged on the outer surface of the support layer 203, forcing the heat from the heating oil pipes 6 to transfer into the drying chamber. Figure 7 The ball valve includes a first valve body 102 and a second valve body 103. A worm gear reducer and a motor 101 are mounted on the second valve body. By setting the ball valve 1, the feed inlet can be closed during the mixing and crushing process to reduce the emission of odors.

[0038] When implementing, such as Figure 2 and Figure 6 The heating assembly includes a heating oil pipe 6, which is disposed within the gap between the inner surface layer 204 and the support layer 203. The oil inlet 601 and oil outlet 602 at both ends of the heating oil pipe 6 are located on the upper cover plate. The heating oil pipe 6 adopts a ring-shaped, layered pipe arrangement, and contains heat-conducting oil. The heating oil pipe 6 is arranged within the interlayer of the drying chamber 2, i.e., installed on the support layer 203, and a heat insulation plate 202 is provided on the outside of the oil passage to improve its heating efficiency. The oil inlet 601 and oil outlet 602 of the heating oil pipe 6 are both located on the upper cover plate of the drying chamber, facilitating uniform heating of the materials inside the drying chamber by the heat-conducting oil. After heating is complete, the heat-conducting oil is pumped out from the oil pump and flows into the drying chamber 2 through the heating oil pipe 6 from the oil inlet 601. It circulates from bottom to top within the drying chamber 2, heating the materials, and finally exits from the top oil outlet before re-entering the heating assembly. The heating oil pipe 6 adopts a ring-shaped layered pipe layout, with denser arrangement near the corner of the bin wall, to facilitate uniform heating of the materials in the drying bin by the hot oil.

[0039] When implementing, such as Figure 3-4The mixing and pulverizing assembly includes two mixing shafts 701. The two ends of each mixing shaft are connected to the upper cover plate and the drying chamber 2 respectively via sealed bearings. Spiral blades 702 are mounted on the outer side of each mixing shaft 701. The two mixing shafts rotate in the same direction. The mixing shafts are made of 316L stainless steel.

[0040] In implementation, the spiral blade 702 comprises three blades, which are fixedly connected to the stirring shaft 701 via blade mounting seats 703. Each blade employs a spiral structure to prevent material from adhering to the blades. The spiral blades 702 and the wall of the drying chamber 2 work together to crush the material. The screw pitch of the three blades is 1.2 screw pitches. This screw pitch length prevents material from adhering to the blades, and the spiral blades and the chamber wall work together to crush the material.

[0041] Furthermore, during operation, the stirring shaft rotates clockwise, and the material moves from top to bottom. After the stirring shaft has been running for 0.5 hours, the drive motor 901 turns the direction so that the stirring shaft rotates counterclockwise. By alternating rotations, the drying efficiency is improved.

[0042] When implementing, such as Figure 4 The transmission system includes a drive motor 901 connected to a frequency converter. The drive motor is also connected to a bevel gear reducer 905. A drive gear 903 is fixed to the output shaft of the bevel gear reducer 905. The upper end of the stirring shaft 701 passes through the upper cover plate and is fixedly fitted with driven gears 902 and 904 that mesh with the drive gear 903. The drive motor is connected to the frequency converter, which allows for program-controlled motor speed control and displays operating information such as speed on an external display. The frequency converter has a memory function, facilitating direct recall of operating parameters, simplifying the operation process, and improving operational efficiency.

[0043] The speed of the drive motor is controlled by a program, and operating information such as speed, current, and voltage can be displayed on an external display.

[0044] When implementing, such as Figure 5The hot air circulation system includes a fan 1001, a heater 1002, an inlet pipe 1003, and an outlet pipe 1004. The outlet end of the fan 1001 is connected to the heater 1002, which is fixedly installed on the drying chamber body 2. The heater 1001 is connected to the upper cover plate via the outlet pipe 1004. The upper cover plate has an air inlet communicating with the outlet pipe, and the inlet end of the fan 1001 is connected to the inlet pipe 1003. Heated air enters through the air inlet and, as the agitator rotates, flows through various corners inside the drying chamber before finally being drawn out through the exhaust port. Further, the exhaust gas, after being discharged from the exhaust port, enters the deodorization chamber, which uses both ozone and activated carbon for deodorization. The heater heats the air blown out by the fan, creating heated air before it enters the drying chamber.

[0045] In implementation, four weighing sensors 4 (YZC-320C type) are fixed to the lower end of the drying chamber 2. The temperature and humidity sensor 5 (TH10S-13 type) is installed inside the drying chamber. The four weighing sensors 4 simultaneously weigh the materials, and the central processing unit displays the weight information on an external display, allowing for statistical analysis of material weight changes during food waste processing. The metal probes of the temperature and humidity sensor 5 measure the ambient temperature and material temperature inside the drying chamber. The data is transmitted to the central processing unit for analysis and comparison, and finally displayed on the external display. Simultaneously, the temperature and humidity information is also linked to an overheat alarm device, allowing users to set the alarm temperature and improve the safety of the food waste processing equipment.

[0046] A method for drying and mixing kitchen waste using multiple heat sources, employing the aforementioned multi-heat-source drying and mixing device for kitchen waste, includes the following steps:

[0047] S1: Weighing sensor 4 records the empty weight of the drying chamber and transmits the weight information to the central processor; the discharge gate closes, ball valve 1 opens, the material enters the drying chamber through the feed port, and then ball valve 1 closes; weighing sensor 4 records the total weight of the material and transmits the weight information to the central processor, which displays the weight information on an external display.

[0048] S2: The heating element and hot air circulation system 10 operate simultaneously, providing dual drying heat sources. The temperature and humidity sensor 5 detects the temperature and humidity inside the drying chamber and transmits the detected data to the central processor. The central processor displays the detected data on an external display. When the temperature inside the drying chamber exceeds the specified value, an alarm device is triggered, and the heating element and hot air circulation system 10 stop operating. The transmission system 9 drives the stirring and crushing component 7 to stir and crush the material. Every specified time interval, the weighing sensor 4 transmits the weight information to the central processor. The central processor compares the weight information, and when the values ​​of the weight information on both adjacent sides are less than the specified value, the drying operation is considered complete.

[0049] Specifically, before the material is fed into the drying chamber, the weighing sensor 4 records the weight of the empty drying chamber, and after feeding, it records the total weight of the material. During the drying and heating process, the weighing sensor 4 records the weight of the drying chamber every 5 minutes. The central processing unit compares the recorded weight information each time. When the difference between two adjacent weight values ​​is less than 0.1%, the drying operation is considered complete, heating is stopped, and the material is discharged from the discharge port.

[0050] Temperature and humidity sensor 5 is installed inside the drying chamber. It transmits the detected data to the central processing unit, which then displays it on an external monitor. It can measure the ambient temperature and humidity inside the chamber, as well as the temperature and humidity of the materials within. The sensor measures the environment in real time before, during, and after material addition. When the ambient temperature inside the chamber exceeds 90°C, an alarm is triggered, and the heating oil circuit and hot air system automatically stop heating to ensure the safe operation of the drying unit.

[0051] Temperature and humidity sensor 5 and weighing sensor 4 are connected to the central processing unit via a data cable. The sensors can be programmed to detect the system's operating status. The control panel of the food waste processing equipment integrates control buttons for stirring shaft speed, emergency stop switch, hot oil switch, and hot air switch, enabling both automatic and manual control modes.

[0052] S3: The heating component and hot air circulation system 10 stop operating, the transmission system continues to drive the mixing and crushing component 7 to operate, the discharge gate is opened, the mixed and crushed material is discharged, and then the transmission system stops operating.

[0053] The multi-heat-source drying and mixing device for kitchen waste disclosed in this application employs multiple heat sources to heat the materials. The arrangement of the heating oil pipes 6 and the hot air duct are optimized to ensure more uniform and stable heating of the materials, thereby improving drying efficiency. To enhance the intelligence of the drying device, temperature and humidity sensors 5 and weighing sensors 4 are installed to monitor the material processing status in real time. The hot air circulation system 10 and the deodorization system work in coordination to effectively reduce the emission of odors from kitchen waste, making kitchen waste treatment more environmentally friendly and economical.

[0054] This device effectively shortens the food waste processing cycle, improves drying efficiency, and reduces the emission of putrid odors during food waste processing. Simultaneously, the drying and mixing unit is equipped with temperature and humidity sensors (5) and weighing sensors (4), greatly enhancing the equipment's intelligence level. It provides real-time feedback on material processing progress and parameters (temperature, humidity, weight), and users can control the drying chamber's operation status via the control panel. To improve equipment safety, an automatic overheat alarm can be set based on sensor data, making material drying and mixing more energy-efficient and preventing food waste from clumping or sticking together.

[0055] By optimizing the structure of the drying device and arranging dual heat sources, drying efficiency is improved. Based on the material's heating characteristics, the heating oil circuit 6 is positioned at the bottom and sides of the drying chamber to increase the heating area, resulting in more uniform and stable heating. A hot air circulation system 10 is designed to both heat the material at the top and remove odors from the kitchen waste through air circulation within the chamber, thus making the drying and mixing operation of kitchen waste more efficient. A vertical double-spiral stirring shaft is configured, with two symmetrically arranged shafts rotating in the same direction. This not only crushes the material but also conveys the crushed material to the discharge port 3. Simultaneously, during the drying process, the temperature and humidity sensors 5 provide real-time feedback on the temperature and humidity inside the drying chamber, and the weighing sensor 4 periodically measures the weight of the drying chamber. The weight changes of the material inside the chamber are calculated, and by analyzing the data from each sensor, the material processing status can be intuitively understood, reducing the operating costs of the kitchen waste processing equipment.

[0056] Finally, it should be noted that those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A multi-heat-source drying and mixing device for kitchen waste, characterized in that, It includes the drying chamber, heating components, mixing and pulverizing components, transmission system, hot air circulation system, and intelligent detection system; The drying chamber is housed within a drying chamber housing. Heating components are installed within the bottom and side walls of the drying chamber housing. A top cover is mounted on the upper end of the drying chamber housing, with a feed inlet and a ball valve installed at the feed inlet. A discharge outlet is located on one side of the drying chamber housing, with a detachable discharge door installed at the discharge outlet. A mixing and pulverizing component is installed inside the drying chamber. A transmission system and a hot air circulation system are mounted on the top cover. The transmission system drives the mixing and pulverizing component, and the hot air circulation system is connected to the drying chamber via an air outlet pipe. An exhaust port is located on the top cover. The intelligent detection system includes a weighing sensor, a temperature and humidity sensor, a central processing unit, and an external display. The weighing sensor, temperature and humidity sensor, and external display are all connected to the central processing unit. The bottom and side walls of the drying chamber each include an outer surface layer, a heat insulation layer, a support layer, and an inner surface layer, arranged from the outside to the inside, with the inner surface layer and the support layer spaced apart. The heating component includes a heating oil pipe, which is disposed in the gap between the inner surface layer and the support layer. The oil inlet and oil outlet at both ends of the heating oil pipe are disposed on the upper cover plate. The heating oil pipe adopts a ring-shaped layered pipe arrangement and is filled with heat-conducting oil. The mixing and pulverizing assembly includes two mixing shafts. The two ends of the mixing shafts are connected to the upper cover plate and the drying chamber body respectively through sealed bearings. Spiral blades are installed on the outer side of the mixing shafts. The spiral blade includes three blades, which are fixedly connected to the stirring shaft via a blade mounting seat. Each blade adopts a spiral structure, and the installation pitch of the three blades is 1.2 pitches. The transmission system includes a drive motor, which is connected to a frequency converter. The drive motor is connected to a bevel gear reducer. The output shaft of the bevel gear reducer is fixed with a drive gear. The upper end of the stirring shaft passes through the upper cover plate and is fixedly installed with a driven gear that meshes with the drive gear. The hot air circulation system includes a fan, a heater, an air inlet pipe, and an air outlet pipe. The air outlet of the fan is connected to the heater, which is fixedly installed on the drying chamber. The heater is connected to the upper cover plate through the air outlet pipe. The upper cover plate is provided with an air inlet that communicates with the air outlet pipe. The air inlet of the fan is connected to the air inlet pipe.

2. The multi-heat-source drying and stirring device for kitchen waste according to claim 1, characterized in that, Four weighing sensors are fixed at the lower end of the drying chamber, and the temperature and humidity sensors are installed inside the drying chamber.

3. The multi-heat-source drying and stirring device for kitchen waste according to claim 1, characterized in that, The inner surface layer is formed by welding 316L stainless steel plate, and the outer surface layer is formed by welding 304 stainless steel plate.

4. A method for drying and mixing kitchen waste using multiple heat sources, characterized in that, The multi-heat-source drying and stirring device for kitchen waste as described in any one of claims 1-3 includes the following steps: S1: The load cell records the weight of the empty drying chamber and transmits the weight information to the central processor; the discharge gate closes, the ball valve opens, the material enters the drying chamber through the feed inlet, and then the ball valve closes; the load cell records the total weight of the material and transmits the weight information to the central processor, which displays the weight information on an external display. S2: The heating element and hot air circulation system operate simultaneously, providing dual drying heat sources. Temperature and humidity sensors detect the temperature and humidity inside the drying chamber and transmit the data to the central processor. The central processor displays the data on an external display. When the temperature inside the drying chamber exceeds the specified value, an alarm is triggered, and the heating element and hot air circulation system stop operating. The transmission system drives the stirring and crushing element to stir and crush the material. At specified intervals, the weighing sensor transmits weight information to the central processor. The central processor compares the weight information, and when the difference between two consecutive weight readings is less than the specified value, the drying operation is considered complete. S3: The heating components and hot air circulation system stop operating, while the transmission system continues to drive the mixing and crushing components. After the discharge gate is opened and the mixed and crushed material is discharged, the transmission system stops operating.

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