Drying system and method for landscaping waste disposal

Abstract

The present application relates to waste treatment technical field, provide a kind of for landscaping waste treatment dry system and method, dry system includes: regenerative electric hot blast furnace, dryer and central controller;Regenerative electric hot blast furnace utilizes valley electricity period to store heat energy and releases heat and generates hot blast in peak electricity period;Dryer is communicated with regenerative electric hot blast furnace arrangement, and dryer is equipped with temperature sensor, flue gas sensor, flame sensor and cooling device;Central controller controls the output state of hot blast of regenerative electric hot blast furnace according to the temperature information fed back by temperature sensor, the flue gas information fed back by flue gas sensor, and the flame information fed back by flame sensor, and the starting and stopping of dryer and the feeding state, and the working state of cooling device.The present application reduces production cost, improves resource utilization efficiency, eliminates security risk, improves automation level, achieves good economic benefit and environmental benefit, and realizes high reliability, intelligent control and energy saving and environmental protection simultaneously.

Description

Technical Field

[0001] This invention relates to the field of waste treatment technology, and in particular to a drying system and method for treating landscaping waste. Background Technology

[0002] Garden and green waste mainly refers to plant residues generated during the natural growth or artificial maintenance of urban green spaces, parks, and roadside greening areas. This includes fallen leaves, weeds, pruned branches, dead trees and shrubs, withered flowers, and lawn mowing materials. Making biomass fuel rods from garden and green waste enables resource reuse and has a broad market application. The process of making biomass fuel rods from garden and green waste requires slicing, crushing, and heating the raw materials.

[0003] Currently, heating methods that typically use boiler steam or electric heating of thermal oil to generate hot air involve large environmental investments and high costs. Alternatively, heating methods that use waste incinerators to generate hot air from garden waste have low resource utilization rates and pose safety hazards. Summary of the Invention

[0004] This invention provides a drying system and method for treating garden waste, which solves the problems of high cost, low resource utilization, and safety hazards associated with existing heating methods such as boiler steam, electrically heated heat transfer oil, and incineration of garden waste.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, the present invention provides a drying system for treating landscaping waste, comprising: A thermal storage electric hot air furnace is used to store thermal energy during off-peak hours and release heat to generate hot air during peak hours. A drying machine is connected to the regenerative electric hot air furnace and receives hot air from the regenerative electric hot air furnace to dry the garden waste. The drying machine is equipped with a temperature sensor, a flue gas sensor, a flame sensor, and a cooling device. The central controller is electrically connected to the regenerative electric hot air furnace and the dryer. The central controller controls the output state of the hot air from the regenerative electric hot air furnace, the start / stop and feeding state of the dryer, and the working state of the cooling device based on the temperature information of the dryer fed by the temperature sensor, the flue gas information of the dryer fed by the flue gas sensor, and the flame information of the dryer fed by the flame sensor.

[0006] A drying system for treating garden waste according to the present invention further includes: a reheating device; One end of the regenerative device is connected to the air outlet pipe of the dryer, and the other end of the regenerative device is connected to the air inlet of the regenerative electric hot air furnace, for recovering waste heat from the exhaust gas and preheating the air inlet. The regenerative device is electrically connected to the central controller.

[0007] A drying system for treating garden waste according to the present invention further includes: an emergency discharge valve and a chimney; The emergency discharge valve is located on the air outlet pipe of the dryer and is situated behind the connecting pipe of the regenerating device. The chimney is connected to the emergency discharge valve. The emergency discharge valve is electrically connected to the central controller.

[0008] According to the present invention, a drying system for treating landscaping waste is provided, wherein the regenerative electric hot air furnace comprises: The insulation cavity, the circulating fan, and the solid heat storage medium built into the insulation cavity are provided. The solid heat storage medium is connected to an external power supply device through a heating element. The insulation cavity is provided with air ducts on both sides and the bottom side. The circulating fan is located on the bottom side of the air ducts. The air ducts are connected to the solid heat storage medium. The air duct is provided with an air inlet and an air outlet. External air enters through the air inlet, passes through the air duct and the heat storage medium in sequence, flows back into the air duct, and is discharged from the air outlet. The heating element heats during off-peak electricity hours and stops heating during peak electricity hours.

[0009] According to the present invention, a drying system for treating garden waste is provided, wherein the regenerative electric hot air furnace further includes: a heat distributor; The heat distributor is located on the lower side of the air duct, and the heat distributor is connected to the air inlet and the air outlet respectively; The heat distributor is communicatively connected to the central controller and is used to adjust the output hot air temperature of the air outlet according to the temperature requirements of the dryer.

[0010] According to the present invention, a drying system for treating garden waste is provided, the drying machine comprising: a cylinder, a bracket, and a transmission mechanism; The cylinder is rotatably mounted on the bracket, the transmission mechanism is mounted on the bracket, and the output end of the transmission mechanism is connected to the cylinder; the cylinder is provided with a feed inlet, a discharge outlet, an air inlet pipe, and an air outlet pipe; The feed inlet is located on the side of the air inlet pipe, and the discharge outlet is located on the side of the air outlet pipe.

[0011] According to the present invention, a drying system for treating garden waste is provided, wherein the cylinder is isolated into a three-layer structure, including: a first cylinder section, a second cylinder section, and a third cylinder section; the first cylinder section, the second cylinder section, and the third cylinder section are nested sequentially. The temperature sensor and the flame sensor are both located in the first cylindrical section, and the flue gas sensor is located in the third cylindrical section; The feed inlet and the air inlet pipe are both connected to the first cylindrical section, and the discharge outlet and the air outlet pipe are both connected to the third cylindrical section.

[0012] A drying system for treating garden waste according to the present invention further includes: an air supply device, wherein the air supply device includes a first air supply fan and a second air supply fan; The first blower is located between the thermal storage electric hot air furnace and the dryer, and the second blower is located at the outlet of the dryer; And / or, also includes: dust removal devices; The dust removal device is located on the rear side of the air outlet duct of the dryer; The dust removal device includes a filter assembly, a dust removal assembly, and a dust discharge assembly; The filter assembly is used to capture solid particles in the exhaust gas from the outlet duct. The dust removal assembly is connected to the filter assembly and is used to remove dust from the filter assembly. The dust discharge assembly is located below the filter assembly and is used to collect and discharge the removed dust.

[0013] Secondly, the present invention provides a drying method for treating garden waste, comprising: During off-peak hours of the power grid, the thermal storage electric hot air furnace is controlled to store thermal energy, and during peak hours of the power grid, the thermal storage electric hot air furnace is controlled to release heat to generate hot air. The system controls the drying machine to dry garden waste. Based on the feedback signals from the temperature sensor, the smoke sensor, and the flame sensor, the system controls the drying machine to stop feeding when the temperature exceeds a threshold. When smoke or flame is detected, the system controls the drying machine to stop feeding and activates the cooling device to cool the waste.

[0014] According to the present invention, a drying method for treating landscaping waste, wherein the drying system is equipped with a reheating device, the drying method further includes: The regenerative device is controlled to recover the waste heat from the exhaust gas discharged from the dryer and transport the waste heat to the air inlet of the regenerative electric hot air furnace.

[0015] The present invention provides a drying system and method for treating garden waste. By setting up a regenerative electric hot air furnace, it stores thermal energy during off-peak electricity hours and releases heat to generate hot air during peak electricity hours. The dryer is equipped with temperature sensors, flue gas sensors, flame sensors, and a cooling device. Based on the temperature information from the temperature sensor, the flue gas information from the flue gas sensor, and the flame information from the flame sensor, a central controller controls the output volume and temperature of the hot air from the regenerative electric hot air furnace, as well as the start / stop and feeding status of the dryer and the working status of the cooling device. This reduces the production cost of drying garden waste, improves resource utilization efficiency, eliminates safety hazards, and enhances automation, achieving good economic and environmental benefits while realizing high reliability, intelligent control, and energy conservation and environmental protection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the regenerative electric hot air furnace provided by the present invention.

[0018] Figure 2 This is a cross-sectional view of the regenerative electric hot air furnace provided by the present invention.

[0019] Figure 3 This is a three-dimensional structural schematic diagram of the drying machine provided by the present invention.

[0020] Figure 4 This is a cross-sectional view of the drying machine provided by the present invention.

[0021] Figure 5 This is a control logic block diagram of the drying system provided by the present invention.

[0022] Figure 6 This is a schematic flowchart of the drying method provided by the present invention.

[0023] Figure label: 1. Thermal storage electric hot air furnace; 11. Insulated cavity; 12. Circulating fan; 13. Solid heat storage medium; 14. Air duct; 15. Heating element; 16. Heat distributor; 141. Air inlet; 142. Air outlet; 2. Dryer; 21. Temperature sensor; 22. Flue gas sensor; 23. Flame sensor; 24. Cooling device; 25. Cylinder; 26. Bracket; 27. Transmission mechanism; 251. Feed inlet; 252. Discharge outlet; 253. Air inlet pipe; 254. Air outlet pipe; 255. First section; 256. Second section; 257. Third section; 3. Central controller; 4. Heat recovery device; 5. First blower; 6. Second blower; 7. Dust removal device. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "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. They are only for the purpose of clarifying the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0027] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] The following is combined with Figures 1 to 6 The present invention provides a detailed description of the drying system and method for treating landscaping waste through specific embodiments and application scenarios.

[0030] Firstly, such as Figure 1 , Figure 3 and Figure 5 As shown, this embodiment provides a drying system for treating garden waste, including: a regenerative electric hot air furnace 1, a dryer 2, and a central controller 3.

[0031] The thermal storage electric hot air furnace 1 is used to store thermal energy during off-peak hours and release heat and generate hot air during peak hours.

[0032] The drying machine 2 is connected to the thermal storage electric hot air furnace 1 and receives hot air from the thermal storage electric hot air furnace 1 to dry the garden green waste. The drying machine 2 is equipped with a temperature sensor 21, a flue gas sensor 22, a flame sensor 23 and a cooling device 24.

[0033] The central controller 3 is electrically connected to the regenerative electric hot air furnace 1 and the dryer 2. The central controller 3 controls the output status of the hot air of the regenerative electric hot air furnace 1, the start-up and stop status and feeding status of the dryer 2, and the working status of the cooling device 24 based on the temperature information of the dryer 2 fed back by the temperature sensor 21, the flue gas information of the dryer 2 fed back by the flue gas sensor 22, and the flame information of the dryer 2 fed back by the flame sensor 23.

[0034] Understandably, the regenerative electric hot air furnace 1 of this embodiment can convert electrical energy into heat energy during off-peak hours and store it in a heat storage medium. During peak hours, it releases the heat in the heat storage medium and outputs hot air to the dryer 2. Since the price of off-peak electricity is lower than that of peak electricity, and off-peak hours are usually at night, which is not conducive to the operation of the dryer 2, the heat energy converted from electrical energy can be stored in the heat storage medium. When hot air needs to be generated during peak hours, the heat stored in the heat storage medium can be used, which can significantly reduce the cost of generating hot air. Furthermore, since the heat storage medium has a large heat storage capacity, it can provide hot air output capacity far exceeding the real-time input power, and the temperature is stable, which can meet the hot air volume required by dryers 2 of different capacities.

[0035] Furthermore, since the thermal storage electric hot air furnace 1 generates heat through resistance and outputs hot air through convection heat exchange with the air, the hot air is relatively clean and has a fast response. It converts electrical energy into stable, clean, and easily transportable hot air energy. Compared with the existing technologies of boiler steam and electric heating thermal oil, boiler steam needs to be converted into hot air through heat exchange, which has low thermal efficiency and high boiler construction costs. For the electric heating thermal oil method, it can only be used immediately and cannot be stored. The thermal efficiency of thermal oil being converted into hot air through heat exchange is also low. The high temperature and high pressure of thermal oil poses safety hazards and has high costs. Compared with the existing technology of heating by burning garden green waste, there are open flames that pose safety hazards, and the combustion process has low thermal efficiency and causes significant environmental pollution.

[0036] Furthermore, both the garden waste and hot air are fed into the dryer 2. Hot air is used to dry and heat the garden waste, avoiding the use of open flames and reducing the risk of fire. In this embodiment, a temperature sensor 21, a smoke sensor 22, and a flame sensor 23 are installed in the dryer 2 to monitor the temperature, smoke, and flame signals inside the dryer 2 in real time. This embodiment also includes a cooling device 24, which can extinguish open flames and lower the temperature inside the dryer 2.

[0037] Specifically, the cooling device 24 includes a nozzle, an electromagnetic control valve, and a cooling pipe. The cooling pipe is connected to a water source, and the opening and closing of the nozzle is intelligently controlled by the electromagnetic control valve to spray cooling water into the dryer 2.

[0038] Specifically, there are two temperature sensors 21. One temperature sensor 21 is located at the feed inlet 251 of the dryer 2, and the other temperature sensor 21 is located at the discharge outlet 252 of the dryer 2. They are used to detect the temperature inside the dryer 2. When the temperature of the temperature sensor 21 exceeds 300°C, the central controller 3 controls the dryer 2 to stop feeding.

[0039] Flame sensor 23 is used to detect open flame, and smoke sensor 22 is used to detect smoke. When flame sensor 23 detects open flame, or smoke sensor 22 detects smoke, central controller 3 controls dryer 2 to stop and stop feeding, and simultaneously starts cooling device 24. When no flame or smoke is detected, central controller 3 controls cooling device 24 to stop working.

[0040] Alternatively, the flue gas sensor 22 may be a differential pressure flue gas sensor.

[0041] Since the central controller 3 is electrically connected to both the regenerative electric hot air furnace 1 and the dryer 2, it can automatically control the heat storage and release processes of the regenerative electric hot air furnace 1, and can control heat storage and release according to a preset peak-valley electricity price schedule. Temperature sensor 21 monitors for process overheating, flue gas sensor 22 monitors for invisible smoldering risks, and flame sensor 23 monitors for open flames. These three sensors form a monitoring network covering the entire process from temperature rise and gas generation to the appearance of open flames. Triggering any sensor will cause the central processor to control the regenerative electric hot air furnace 1 to respond quickly, reducing the output temperature of the hot air. This creates multiple electrical interlocking safety barriers, ensuring the safety of the drying system.

[0042] Furthermore, the central controller 3 can dynamically adjust the output air temperature and air volume of the regenerative electric hot air furnace 1 according to the optimal temperature curve of different stages of drying in the drying furnace, avoiding energy waste caused by excessive heating. In this embodiment, the central controller 3 forms a closed-loop control between the regenerative electric hot air furnace 1 and the drying furnace, ensuring the precise and stable parameters of the hot air and ensuring the consistency and reliability of the quality of batch drying of garden green waste.

[0043] Specifically, the central controller 3 can be a PLC controller. Furthermore, the central controller 3 of the drying system is equipped with a human-machine interface module for operators to set parameters, monitor status, query alarms, and switch between manual and automatic control.

[0044] The drying system for landscaping waste provided by this invention utilizes a regenerative electric hot air furnace 1 to store thermal energy during off-peak hours and release heat to generate hot air during peak hours. A temperature sensor 21, a flue gas sensor 22, a flame sensor 23, and a cooling device 24 are installed in the dryer 2. Based on the temperature information from the temperature sensor 21, the flue gas information from the flue gas sensor 22, and the flame information from the flame sensor 23, a central controller 3 controls the output volume and temperature of the hot air from the regenerative electric hot air furnace 1, as well as the start / stop and feeding status of the dryer 2 and the working status of the cooling device 24. This reduces the production cost of drying landscaping waste, improves resource utilization efficiency, eliminates safety hazards, and enhances automation, achieving good economic and environmental benefits while simultaneously realizing high reliability, intelligent control, and energy conservation and environmental protection.

[0045] like Figure 1 and Figure 5 As shown, the drying system for treating garden waste in this embodiment also includes a reheating device 4.

[0046] One end of the regenerating device 4 is connected to the air outlet pipe 254 of the dryer 2, and the other end of the regenerating device 4 is connected to the air inlet 141 of the regenerative electric hot air furnace 1, which is used to recover the waste heat of the exhaust gas and preheat the air inlet 141; the regenerating device 4 is electrically connected to the central controller 3.

[0047] Understandably, the regenerative device 4 can introduce the waste gas with residual heat discharged from the dryer 2 into the regenerative electric hot air furnace 1, thereby increasing the temperature of the air entering the regenerative electric hot air furnace 1. This directly reduces the electrical energy consumed by the regenerative electric hot air furnace 1 to heat the air from room temperature to preheat temperature. Furthermore, due to heat recovery, the final emission temperature of the waste gas is significantly reduced, which not only reduces energy loss but also reduces the thermal stress on the downstream pipelines, extending the life of the equipment.

[0048] Specifically, the regeneration device 4 includes a regeneration control valve and a regeneration pipe. One end of the regeneration pipe is connected to the air outlet pipe 254 of the dryer 2, and the other end of the regeneration pipe is connected to the air inlet 141 of the regenerative electric hot air furnace 1. The regeneration control valve is located on the regeneration pipe and is electrically connected to the central controller 3.

[0049] The drying system for treating landscaping waste in this embodiment also includes an emergency discharge valve and a chimney.

[0050] The emergency discharge valve is located on the air outlet pipe 254 of the dryer 2 and is located behind the connecting pipe of the regenerator 4. The chimney is connected to the emergency discharge valve.

[0051] The emergency discharge valve is electrically connected to the central controller 3.

[0052] Understandably, during the drying process of garden waste, if the temperature of the exhaust gas discharged from the air outlet 254 of the dryer 2 is too high and cannot be recycled, or if other equipment in the drying system malfunctions and needs to be shut down for maintenance, the waste can be discharged in an emergency through the emergency discharge valve and chimney.

[0053] At this time, the central controller 3 controls the emergency discharge valve to open. After the emergency discharge valve is fully opened, the central controller 3 controls the reuse control valve to close.

[0054] like Figure 1 and Figure 2 As shown, the heat storage electric hot air furnace 1 of this embodiment includes: a heat preservation cavity 11, a circulating fan 12, and a solid heat storage medium 13 built into the heat preservation cavity 11. The solid heat storage medium 13 is connected to an external power supply device through a heating element 15. Air ducts 14 are provided on both sides and the bottom of the heat preservation cavity 11. The circulating fan 12 is located on the bottom of the air ducts 14. The air ducts 14 are connected to the solid heat storage medium 13.

[0055] The air duct 14 is provided with an air inlet 141 and an air outlet 142. After entering through the air inlet 141, the outside air passes through the air duct 14 and the heat storage medium in sequence, and flows back to the air duct 14 before being discharged through the air outlet 142.

[0056] The heating element 15 heats during off-peak electricity periods and stops heating during peak electricity periods.

[0057] Understandably, the air duct 14 is connected to the insulation cavity 11 to form a circulating air circuit. Under the action of the circulating fan 12, the air circulates in the air duct 14 during the peak power stage and is heated by the solid heat storage medium 13.

[0058] When in use, after the device is turned on, the circulating fan 12 starts running. The outside air continuously entering from the air inlet 141 is heated to a high temperature and then discharged from the air outlet 142 to supply the dryer 2. During off-peak electricity periods, the heating element 15 continuously heats the solid heat storage medium 13, converting electrical energy into heat energy and storing it in the solid heat storage medium 13. During peak electricity periods, the heating element 15 stops heating, and the outside air enters from the air inlet 141, passes through the air duct 14 and the solid heat storage medium 13 in sequence, is heated to a high temperature, and then is discharged from the air outlet 142. This utilizes off-peak electricity for energy storage, improves the utilization rate of electrical energy, and reduces the cost of hot air.

[0059] One end of the heating element 15 is installed inside the solid heat storage medium 13, and the other end of the heating element 15 extends out of the heat preservation cavity 11.

[0060] Specifically, the solid heat storage medium 13 can be magnesium oxide brick. The insulation cavity 11 is filled with aluminum silicate cotton. The outer shell of the regenerative electric hot air furnace 1 is made of galvanized steel sheet.

[0061] Optionally, the thermal storage electric hot air furnace 1 may also be equipped with a temperature sensor to detect the temperature of the solid thermal storage medium 13, the temperature at the air inlet 141 and the air outlet 142.

[0062] Furthermore, the thermal storage electric hot air furnace 1 can also be equipped with a high-temperature alarm and a low-temperature alarm, which are electrically connected to a temperature sensor and a central controller 3, respectively. When the temperature difference of the solid thermal storage medium 13 exceeds 850°C, the high-temperature alarm sends a high-temperature alarm signal to the central controller 3, and the central controller 3 controls the heating element 15 to stop heating; when the temperature difference of the solid thermal storage medium 13 is lower than 250°C, the low-temperature alarm sends a low-temperature alarm signal to the central controller 3, and the central controller 3 controls the heating element 15 to start heating.

[0063] like Figure 2 and Figure 5 As shown, the regenerative electric hot air furnace 1 in this embodiment also includes a heat distributor 16.

[0064] The heat distributor 16 is located on the lower side of the air duct 14, and the heat distributor 16 is connected to the air inlet 141 and the air outlet 142 respectively.

[0065] The heat distributor 16 is connected to the central controller 3 and is used to adjust the output hot air temperature of the air outlet 142 according to the temperature requirements of the dryer 2.

[0066] Understandably, the heat distributor 16 can adjust the hot air temperature at the air outlet 142. As the temperature of the heat storage medium gradually changes during the heat release process, the hot air output from the heat storage medium in the air duct 14 has a high temperature and is unstable. The heat distributor 16 can evenly mix the high-temperature hot air with the low-temperature or normal-temperature air entering through the air inlet 141, thereby achieving precise and continuous adjustment of the hot air temperature at the air outlet 142.

[0067] like Figure 3 and Figure 4 As shown, the drying machine 2 in this embodiment includes: a cylinder 25, a bracket 26, and a transmission mechanism 27.

[0068] The cylinder 25 is rotatably mounted on the bracket 26, and the transmission mechanism 27 is mounted on the bracket 26. The output end of the transmission mechanism 27 is connected to the cylinder 25. The cylinder 25 is provided with a feed inlet 251, a discharge outlet 252, an air inlet pipe 253, and an air outlet pipe 254.

[0069] The feed inlet 251 is located on the side of the air inlet pipe 253, and the discharge outlet 252 is located on the side of the air outlet pipe 254.

[0070] Understandably, the dryer 2 in this embodiment is a drum-type dryer, and the drum 25 can rotate around the bracket 26 under the drive of the transmission mechanism 27. As the drum 25 rotates and tumbles, it can effectively process uneven and easily tangled garden waste debris, preventing clumping or the formation of ventilation dead corners. Furthermore, the debris is repeatedly lifted and scattered inside the drum 25, allowing for sufficient and direct convective heat exchange with the dry hot air, increasing the contact area and time between the debris and the hot air.

[0071] Specifically, the dryer 2 also includes a feeding assembly, which is located at the feed inlet 251 and uses a chain conveyor.

[0072] like Figure 3 , Figure 4 and Figure 5 As shown, the cylinder 25 in this embodiment is isolated into a three-layer structure, including: a first cylinder section 255, a second cylinder section 256 and a third cylinder section 257; the first cylinder section 255, the second cylinder section 256 and the third cylinder section 257 are sequentially nested.

[0073] Temperature sensor 21 and flame sensor 23 are both located in the first section 255, and smoke sensor 22 is located in the third section 257.

[0074] The feed inlet 251 and the air inlet pipe 253 are both connected to the first cylinder section 255, and the discharge outlet 252 and the air outlet pipe 254 are both connected to the third cylinder section 257.

[0075] Understandably, in order to ensure that the garden waste and hot air can be fully mixed, the cylinder 25 in this embodiment is divided into three layers. The material and hot air both enter from the first cylinder section 255 and flow to the second cylinder section 256, and from the second cylinder section 256 to the third cylinder section 257. Finally, the material flows out from the discharge port 252, and the hot air flows out from the air outlet 254.

[0076] Since the first section 255 has the largest volume and is the space where the material and hot air just begin to mix, both the temperature sensor 21 and the flame sensor 23 are located in the first section 255 to monitor the temperature after mixing and whether a flame is generated due to excessively high hot air temperature. Since the third section 257 is the last stage of the mixture process, the flue gas sensor 22 is located in the third section 257 to monitor whether there is smoldering in the mixture.

[0077] like Figure 5 As shown, the drying system for treating garden waste in this embodiment further includes an air supply device, which includes a first air supply fan 5 and a second air supply fan 6.

[0078] The first blower 5 is located between the thermal storage electric hot air furnace 1 and the dryer 2, and the second blower 6 is located at the outlet of the dryer 2.

[0079] Understandably, the first blower 5 is used to deliver hot air from the regenerative electric hot air furnace 1 into the dryer 2, and the second blower 6 is used to deliver the exhaust gas from the outlet of the dryer 2 into the regenerating pipe for heat circulation. The first blower 5 and the second blower 6 can overcome the resistance in the conveying pipe and realize the delivery of hot air between the various components.

[0080] In this embodiment, both the first blower 5 and the second blower 6 are electrically connected to the central controller 3. The central controller 3 can control the start and stop of the first blower 5 and the second blower 6 and adjust their speed.

[0081] like Figure 5 As shown, the drying system for treating garden waste in this embodiment also includes a dust removal device 7.

[0082] The dust removal device 7 is located behind the air outlet pipe 254 of the dryer 2.

[0083] The dust removal device 7 includes a filter assembly, a dust removal assembly, and a dust discharge assembly.

[0084] The filter assembly is used to capture solid particles in the exhaust gas from the outlet duct 254. The dust removal assembly is connected to the filter assembly and is used to remove dust from the filter assembly. The dust discharge assembly is located below the filter assembly and is used to collect and discharge the removed dust.

[0085] Understandably, since the exhaust gas discharged from the air outlet 254 of the dryer 2 contains solid particulate matter, in order to avoid direct emission and pollution of the atmosphere, this embodiment provides a dust removal device 7 on the rear side of the air outlet 254 of the dryer 2.

[0086] The filter assembly contains fiber filter bags that capture solid particles. When the resistance of the filter assembly reaches a set value, the dust removal assembly is activated to remove the solid particles from the filter assembly. The solid particles fall into the dust discharge assembly and are discharged. Because the exhaust gas becomes clean hot air after passing through the dust removal device 7, it reduces the damage to the reheating device 4 caused by solid particles carried by the exhaust gas and the pollution to the environment caused by direct exhaust gas emissions.

[0087] Secondly, such as Figure 6 As shown, this embodiment provides a drying method for treating garden waste, including the following steps: Step 611: During off-peak hours of the power grid, control the thermal storage electric hot air furnace 1 to store thermal energy, and during peak hours of the power grid, control the thermal storage electric hot air furnace 1 to release heat and generate hot air.

[0088] Step 612: Control the dryer 2 to dry the garden waste, and based on the feedback signals from the temperature sensor 21, the smoke sensor 22 and the flame sensor 23, control the dryer 2 to stop feeding when the temperature exceeds the threshold, and control the dryer 2 to stop feeding and start the cooling device 24 to cool down when smoke or flame is detected.

[0089] Understandably, the operation of the regenerative electric hot air furnace 1 is controlled at different times. During off-peak hours, it consumes electrical energy and converts it into internal energy, which is stored in the heat storage medium of the regenerative electric hot air furnace 1. During peak hours, the connection between the regenerative electric hot air furnace 1 and the external power supply equipment is turned off, and the heat energy stored in the heat storage medium is exchanged with the air to generate hot air, which is used as the drying medium of the dryer 2.

[0090] Furthermore, hot air is used in the dryer 2 to dry and heat the garden waste to reduce its moisture content. Since there are safety hazards of overheating and fire during the operation of the dryer 2, this embodiment monitors the temperature inside the dryer 2. Feeding is stopped when the temperature is too high. The dryer 2 also monitors for flames to detect open flames and for smoldering to detect smoldering. Upon detection of flames and smoldering, the dryer 2 stops operating and feeding is halted. The cooling device 24 of the dryer 2 is activated to cool the garden waste until the alarm is cleared, at which point the cooling device 24 stops operating.

[0091] The drying method for treating garden waste of the present invention uses a regenerative electric hot air furnace 1 to accumulate heat during off-peak hours and release heat during peak hours to generate hot air, which serves as the drying medium for the dryer 2. This reduces electricity costs. Furthermore, the temperature, flame, and flue gas in the dryer 2 are monitored in real time, forming multiple electrical interlocking safety barriers to eliminate the risk of overheating in the dryer 2 and extend its overall lifespan. The closed-loop control of the dryer 2 and the regenerative electric hot air furnace 1 ensures the precise and stable hot air parameters, ensuring the material quality of the dried garden waste. This achieves a balance of safety, economy, efficiency, and environmental protection.

[0092] When the drying system is equipped with a reheating device 4, the drying method for treating garden waste in this embodiment further includes the following steps: The control reheat device 4 recovers the waste heat from the exhaust gas discharged from the dryer 2 and transports the waste heat to the air inlet 141 of the regenerative electric hot air furnace 1.

[0093] Understandably, in order to improve the utilization rate of heat, the drying system in this embodiment is equipped with a regenerator 4. The exhaust gas discharged from the dryer 2 is led back to the air inlet 141 of the regenerable electric hot air furnace 1 at the rear side of the air outlet 254 of the dryer 2, thereby increasing the air inlet temperature of the regenerable electric hot air furnace 1 and saving the power consumption of the regenerable electric hot air furnace 1.

[0094] Specifically, the required hot air volume and temperature are calculated based on the processing capacity of the dryer 2. Based on the inlet air temperature monitored by the dryer 2, the required amount of air to be supplied is first calculated according to the rated operating temperature and air supply of the thermal storage electric hot air furnace 1. Then, the air volume and the air volume or air temperature of the thermal storage electric hot air furnace 1 are dynamically adjusted according to the actual outlet temperature. The reuse control valve is opened, and the air inlet valve is closed at the same time. The reuse air volume gradually increases, and the air volume gradually decreases until it is completely closed. The air volume ratio is dynamically adjusted according to the outlet temperature.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drying system for treating landscaping waste, characterized in that, include: A thermal storage electric hot air furnace is used to store thermal energy during off-peak hours and release heat to generate hot air during peak hours. A drying machine is connected to the regenerative electric hot air furnace and receives hot air from the regenerative electric hot air furnace to dry the garden waste. The drying machine is equipped with a temperature sensor, a flue gas sensor, a flame sensor, and a cooling device. The central controller is electrically connected to the regenerative electric hot air furnace and the dryer. The central controller controls the output state of the hot air from the regenerative electric hot air furnace, the start / stop and feeding state of the dryer, and the working state of the cooling device based on the temperature information of the dryer fed by the temperature sensor, the flue gas information of the dryer fed by the flue gas sensor, and the flame information of the dryer fed by the flame sensor.

2. The drying system for treating landscaping waste according to claim 1, characterized in that, Also includes: Regenerative device; One end of the regenerative device is connected to the air outlet pipe of the dryer, and the other end of the regenerative device is connected to the air inlet of the regenerative electric hot air furnace, for recovering waste heat from the exhaust gas and preheating the air inlet. The regenerative device is electrically connected to the central controller.

3. The drying system for treating landscaping waste according to claim 2, characterized in that, Also includes: Emergency discharge valves and chimneys; The emergency discharge valve is located on the air outlet pipe of the dryer and is situated behind the connecting pipe of the regenerating device. The chimney is connected to the emergency discharge valve. The emergency discharge valve is electrically connected to the central controller.

4. The drying system for treating landscaping waste according to claim 1, characterized in that, The regenerative electric hot air furnace includes: The insulation cavity, the circulating fan, and the solid heat storage medium built into the insulation cavity are provided. The solid heat storage medium is connected to an external power supply device through a heating element. The insulation cavity is provided with air ducts on both sides and the bottom side. The circulating fan is located on the bottom side of the air ducts. The air ducts are connected to the solid heat storage medium. The air duct is provided with an air inlet and an air outlet. External air enters through the air inlet, passes through the air duct and the heat storage medium in sequence, flows back into the air duct, and is discharged from the air outlet. The heating element heats during off-peak electricity hours and stops heating during peak electricity hours.

5. The drying system for treating landscaping waste according to claim 4, characterized in that, The regenerative electric hot air furnace also includes: a heat distributor; The heat distributor is located on the lower side of the air duct, and the heat distributor is connected to the air inlet and the air outlet respectively; The heat distributor is communicatively connected to the central controller and is used to adjust the output hot air temperature of the air outlet according to the temperature requirements of the dryer.

6. The drying system for treating landscaping waste according to claim 1, characterized in that, The drying machine includes: a cylinder, a bracket, and a transmission mechanism; The cylinder is rotatably mounted on the bracket, the transmission mechanism is mounted on the bracket, and the output end of the transmission mechanism is connected to the cylinder; the cylinder is provided with a feed inlet, a discharge outlet, an air inlet pipe, and an air outlet pipe; The feed inlet is located on the side of the air inlet pipe, and the discharge outlet is located on the side of the air outlet pipe.

7. The drying system for treating landscaping waste according to claim 6, characterized in that, The cylindrical body is divided into three layers: a first cylindrical section, a second cylindrical section, and a third cylindrical section; the first cylindrical section, the second cylindrical section, and the third cylindrical section are nested together sequentially. The temperature sensor and the flame sensor are both located in the first cylinder section, and the flue gas sensor is located in the third cylinder section; The feed inlet and the air inlet pipe are both connected to the first cylindrical section, and the discharge outlet and the air outlet pipe are both connected to the third cylindrical section.

8. The drying system for treating landscaping waste according to claim 1, characterized in that, Also includes: An air supply device, the air supply device including a first air supply fan and a second air supply fan; The first blower is located between the thermal storage electric hot air furnace and the dryer, and the second blower is located at the outlet of the dryer; And / or, also includes: dust removal devices; The dust removal device is located on the rear side of the air outlet duct of the dryer; The dust removal device includes a filter assembly, a dust removal assembly, and a dust discharge assembly; The filter assembly is used to capture solid particles in the exhaust gas from the outlet duct. The dust removal assembly is connected to the filter assembly and is used to remove dust from the filter assembly. The dust discharge assembly is located below the filter assembly and is used to collect and discharge the removed dust.

9. A drying method for treating garden waste, characterized in that, The drying system for treating landscaping waste as described in any one of claims 1 to 8 comprises: During off-peak hours of the power grid, the thermal storage electric hot air furnace is controlled to store thermal energy, and during peak hours of the power grid, the thermal storage electric hot air furnace is controlled to release heat to generate hot air. The system controls the drying machine to dry garden waste. Based on the feedback signals from the temperature sensor, the smoke sensor, and the flame sensor, the system controls the drying machine to stop feeding when the temperature exceeds a threshold. When smoke or flame is detected, the system controls the drying machine to stop feeding and activates the cooling device to cool the waste.

10. The drying method for treating landscaping waste according to claim 9, characterized in that, When the drying system is equipped with a reheating device, the drying method further includes: The regenerative device is controlled to recover the waste heat from the exhaust gas discharged from the dryer and transport the waste heat to the air inlet of the regenerative electric hot air furnace.

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