Integrated device for dewatering and low-temperature baking of high-water-content organic solid waste and method of use thereof

Abstract

An integrated device for dehydrating and low-temperature baking high-moisture organic solid waste includes a shell with a top cover, an outer barrel, a dehydration carbonization barrel, a micro-oxygen control module, a rinsing module, a microwave generator, a rotary drive module, a drainage and exhaust module, and a controller. The outer barrel is fixedly installed in the shell; the dehydration carbonization barrel is rotatably installed in the outer barrel; the micro-oxygen control module is connected to the outer barrel; the rinsing module is installed on the top of the outer barrel; the microwave generator is installed on the top cover and corresponds vertically to the outer barrel; the rotary drive module is installed in the shell and is connected to the dehydration carbonization barrel; the drainage and exhaust module is located in the shell and connected to the bottom of the outer barrel; the controller is connected to the micro-oxygen control module, the rinsing module, the microwave generator, and the rotary drive module. This invention has high baking thermal efficiency, which can significantly reduce the generation of gases such as CO, NOx, and VOCs, increase the yield of baked solids, reduce the production of macromolecular organic pollutants, increase the added value of high-moisture organic solid waste treatment products such as kitchen waste, and has significant environmental benefits.

Description

Technical Field

[0001] This invention relates to the field of organic solid waste treatment technology. Specifically, it relates to an integrated device for dehydrating and low-temperature baking high-moisture organic solid waste and its usage method. The device can dehydrate high-moisture organic solid waste and perform pyrolysis and carbonization through baking. It can be used in residential communities, catering industry, food courts and other places to treat high-moisture organic solid waste such as kitchen waste. Background Technology

[0002] Existing treatment devices for high-moisture organic solid waste such as kitchen waste either collect the waste in a processor, pulverize it, and discharge it directly, or transport it for centralized treatment. The pulverization-direct discharge method primarily involves adding water for grinding and pulverizing, followed by direct discharge into the sewer system. This method easily causes sewer blockages and river pollution.

[0003] Centralized treatment of high-moisture organic solid waste involves collecting kitchen waste and other high-moisture organic solid waste generated by households and restaurants, and transporting it to specialized treatment facilities. During transportation, problems arise such as leakage, bacterial growth, odor production from decomposition, and the failure to effectively recover and utilize some valuable substances.

[0004] Chinese invention patent CN2023110329531 discloses a kitchen waste crushing, extrusion, dehydration, and carbonization device, relating to the field of kitchen waste treatment. The device includes a crushing component, an extrusion component at the bottom of the crushing component, a heating component connected to the extrusion component below the crushing component, and a discharge mechanism at the top of the crushing component. This kitchen waste crushing, extrusion, dehydration, and carbonization device, by incorporating the discharge mechanism, crushing component, extrusion component, and heating component, can fully crush kitchen waste, extrude water, reduce the volume of kitchen waste, discharge wastewater, and reduce the weight of kitchen waste. Finally, the kitchen waste is heated and carbonized, preventing rot, odors, and bacterial growth, thus achieving the technical objective of rationally treating kitchen waste. Furthermore, this kitchen waste crushing, extrusion, dehydration, and carbonization device can also be miniaturized and used as a household appliance, thereby reducing the frequency of going out to dispose of garbage, saving time, and improving the user experience. However, the kitchen waste crushing, extrusion, dehydration and carbonization device in the above patent has a complex structure design. During extrusion and dehydration, some kitchen waste is prone to sticking to the wall. During heating and carbonization, heating rods are used, which has low thermal efficiency and is prone to coking. It may also produce gaseous pollutants such as CO, NOx and volatile organic compounds (VOCs), causing secondary environmental pollution. The added value of the products after kitchen waste treatment is low.

[0005] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an integrated device for dehydrating and baking high-moisture organic solid waste and its usage method. This invention aims to solve the problems of environmental pollution and low resource utilization rate in the treatment of high-moisture organic solid waste such as kitchen waste. The centrifugal dehydration and low-temperature baking of this invention are carried out sequentially in the same space, with a simple structure, which improves the comprehensive conversion rate of high-moisture organic solid waste such as kitchen waste.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: an integrated device for dehydration and low-temperature baking of high-moisture organic solid waste, including a shell with a top cover, an outer barrel, a dehydration carbonization barrel, a micro-oxygen control module, a rinsing module, a microwave generator, a rotation drive module, a drainage and exhaust module, and a controller.

[0008] The outer barrel is fixedly installed inside the outer casing;

[0009] The dehydration carbonization tank is rotated inside the outer tank and is used for preliminary solid-liquid separation treatment of organic solid waste with high water content;

[0010] The micro-oxygen control module is connected to the outer tank and is used to create a micro-oxygen environment inside the outer tank and control the oxygen content inside the outer tank.

[0011] The rinsing module is installed on top of the outer tub and is used to rinse the inner wall of the outer tub;

[0012] The microwave generator is installed on the top cover and corresponds to the outer barrel. It is used to bake and carbonize the dehydrated organic solid waste in the dehydration carbonization barrel.

[0013] The rotary drive module is installed in the housing and is connected to the dehydration carbonization barrel via a transmission, used to drive the dehydration carbonization barrel to rotate;

[0014] The drainage and venting module is located in the outer casing and connected to the bottom of the outer barrel, and is used to discharge the liquid generated during dehydration and rinsing as well as the gas generated during baking;

[0015] The controller is connected to the micro-oxygen control module, the rinsing module, the microwave generator, the rotary drive module, and the drainage and exhaust module, respectively.

[0016] Based on the above, the walls of the dehydration carbonization barrel are evenly distributed with dehydration holes, the diameter of which gradually decreases from top to bottom, and the bottom of the dehydration carbonization barrel is rotatably installed inside the outer barrel.

[0017] Based on the above, the micro-oxygen control module includes a nitrogen cylinder and an oxygen concentration detector. The nitrogen cylinder is located on the outer side of the outer shell. A gas supply pipe that passes through one side plate of the outer shell is connected between the gas outlet of the nitrogen cylinder and the wall of the outer barrel. A first solenoid valve is installed on the gas supply pipe. The oxygen concentration detector is installed on the upper part of the wall of the outer barrel. The controller is connected to the oxygen concentration detector and the first solenoid valve respectively.

[0018] Based on the above, the rinsing module includes a water spray ring, which is fixedly installed on the upper inner circle of the outer tub. The bottom of the water spray ring has several spray holes that are evenly opened in the circumferential direction and spray downward toward the inner wall of the outer tub. The water spray ring is connected to a tap water pipe. A booster pump and a second solenoid valve are installed on the tap water pipe along the fluid direction. The controller is connected to the booster pump and the second solenoid valve respectively.

[0019] Based on the above, the microwave generator mainly consists of a microwave generator and a waveguide. The microwave generator is fixedly installed on the inner top surface of the top cover. A bucket lid that covers the outside of the microwave generator and is adapted to the top of the outer bucket is also fixedly installed on the inner top surface of the top cover. A microwave transmission hole is opened on the bucket lid corresponding to the waveguide position. The microwave generator emits microwaves from the microwave transmission hole. When the top cover is sealed and fastened to the top of the outer shell, the bucket lid is correspondingly sealed and fastened to the top of the outer bucket. The controller is connected to the microwave generator.

[0020] Based on the above, the rotary drive module includes a motor and a gearbox, both of which are installed in the housing. The gearbox is located directly below the outer barrel. The output shaft of the gearbox is coaxially rotatably connected to the bottom of the outer barrel. The output shaft of the gearbox is rotatably and sealed to the bottom of the outer barrel. The upper end of the output shaft of the gearbox is fixedly fitted into the bottom center of the dehydration and carbonization barrel. The input shaft of the gearbox is connected to the motor shaft of the motor via a track drive. The controller is connected to the motor.

[0021] Based on the above, the drainage and venting module includes a three-way solenoid valve, a drain pipe, a vent pipe, and an exhaust pipe. The first port of the three-way solenoid valve is fixedly connected to the bottom of the outer tub. The drain pipe and vent pipe are vertically arranged inside the outer casing and located below the outer tub. The upper end of the drain pipe is connected to the second port of the three-way solenoid valve, and the upper end of the vent pipe is connected to the third port of the three-way solenoid valve. The lower end of the drain pipe extends downward to the bottom of the outer casing, then bends horizontally backward and extends out from the lower part of the rear side panel of the outer casing. After the lower end of the drain pipe exits from the rear side of the outer casing... It is connected to the sewage pipe. The lower end of the drain pipe extends out from one side of the outer shell and is connected to an oil-water separator. The water outlet of the oil-water separator is connected to the sewage pipe, and the oil outlet of the oil-water separator is connected to an oil storage tank. The exhaust pipe is vertically installed in the outer shell and located at the rear of the outer barrel. The lower end of the exhaust pipe is connected to the upper part of the horizontal section of the sewage pipe. The upper end of the exhaust pipe extends upward to the upper part of the inner shell and bends horizontally backward. The upper end of the exhaust pipe is fixedly connected to the upper part of the rear side plate of the outer shell and communicates with the outside atmosphere. The controller is connected to a three-way solenoid valve.

[0022] When the three-way solenoid valve is energized, the first and second ports of the three-way solenoid valve are connected, and the third port of the three-way solenoid valve is closed; when the three-way solenoid valve is de-energized, the first and third ports of the three-way solenoid valve are connected, and the second port of the three-way solenoid valve is closed.

[0023] Based on the above, several heat dissipation fins are fixedly installed on the outer walls of both the vertical and horizontal sections of the sewage pipe, and a condenser fan that blows air toward the heat dissipation fins is fixedly installed inside the outer shell, with the controller connected to the condenser fan.

[0024] Based on the above, the rear side of the top cover is hinged to the upper edge of the rear side plate of the outer shell, and hydraulic buffers are connected to the left and right sides of the top cover and the outer shell respectively.

[0025] Using the above technical solution, a method for using an integrated device for dewatering and low-temperature baking of high-moisture organic solid waste includes the following steps:

[0026] Open the top cover and pour kitchen waste and other high-moisture organic solid waste into the dehydration carbonization bucket. Then close the top cover, and the bucket lid is also sealed and fastened to the top of the outer bucket to seal the outer bucket. Start the device, and the controller controls the motor to work. The first and second solenoid valves are in the closed state, the three-way solenoid valve is de-energized, the first and third interfaces of the three-way solenoid valve are connected, the second interface of the three-way solenoid valve is closed, and the outer bucket is connected to the drain pipe. The motor drives the dehydration carbonization bucket to rotate at low speed and then high speed through the gearbox to perform preliminary solid-liquid separation on the high-moisture organic solid waste, so that the high-moisture organic solid waste is dehydrated. The wastewater produced by dehydration is discharged through the drain pipe and enters the oil-water separator tank. In the oil-water separator tank, the wastewater is separated into oil and water through a hydrophilic and oleophobic film. The clean water after oil-water separation is discharged from the outlet of the oil-water separator tank into the sewage pipe, while the separated oil enters the oil storage tank from the oil outlet of the oil-water separator tank for recovery.

[0027] After the high-moisture organic solid waste is dehydrated, the motor stops working, the booster pump is started, and the second solenoid valve is opened to pressurize the water in the tap water pipe and enter the spray ring. The water in the spray ring is then sprayed obliquely downward through various spray holes to rinse the inner wall of the outer barrel. Similarly, the wastewater generated from rinsing is discharged through the drain pipe and enters the oil-water separator. In the oil-water separator, the wastewater is separated into oil and water through a hydrophilic and oleophobic membrane. The clean water after oil-water separation is discharged from the outlet of the oil-water separator into the sewage pipe, while the separated oil enters the oil storage tank from the oil outlet of the oil-water separator for recovery.

[0028] After rinsing, the booster pump stops working, the second solenoid valve closes, the three-way solenoid valve is energized, the first and second ports of the three-way solenoid valve are connected, the third port of the three-way solenoid valve is closed, and the outer tub is connected to the drain pipe. Before the microwave generator starts working, the nitrogen cylinder valve and the first solenoid valve are opened, so that the nitrogen in the nitrogen cylinder can be purged through the gas delivery pipe to reduce the oxygen content in the outer tub and create a micro-oxygen environment. At the same time, the oxygen content in the outer tub is monitored by an oxygen concentration detector. When the oxygen content is between 1-18% VOL, the microwave generator starts working.

[0029] The microwave generator heats the dehydrated organic solid waste at 180-350℃ using microwaves to achieve low-temperature baking of the organic solid waste, thus baking and carbonizing the organic solid waste. During the low-temperature baking process, the motor works and drives the dehydration and carbonization barrel to rotate at low speed through the gearbox.

[0030] During the low-temperature baking process, the baking exhaust gas generated enters the drain pipe. At the same time, the condenser fan works, which cools the baking exhaust gas entering the drain pipe through the condenser fan and heat dissipation fins. After the condensable substances in the baking exhaust gas are condensed and removed, the baking exhaust gas is discharged through the exhaust pipe. The condensable substances are condensed and discharged directly into the sewage pipe from the lower end of the drain pipe.

[0031] After the low-temperature baking is complete, close the nitrogen cylinder valve and the first solenoid valve, turn off the microwave generator, motor and condenser fan, open the top cover and take out the carbonized material.

[0032] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, compared with the prior art, the beneficial effects of this invention are:

[0033] (1) The present invention can control the temperature within the range of 180-350℃ by controlling the power of microwaves. Microwaves are used as a heat source to bake organic solid waste such as kitchen waste after centrifugal dehydration at low temperature. During the low temperature baking process, the dehydration carbonization barrel drives the organic solid waste such as kitchen waste to rotate at low speed, which ensures uniform heating of the organic solid waste such as kitchen waste and achieves efficient baking of organic solid waste such as kitchen waste within this temperature range. It can not only greatly reduce the generation of gases such as CO, NOx, and volatile organic compounds (VOCs), but also retain the organic matter in the organic solid waste such as kitchen waste in the carbonized solid.

[0034] (2) By controlling the oxygen content inside the outer barrel during the low-temperature baking process, partial self-heating of the low-temperature baking process is achieved, thereby further improving the baking thermal efficiency. Among them, most VOCs can be burned under the action of microwaves and micro-oxygen, thus providing part of the energy required for baking and further reducing the generation of pollutants such as VOCs.

[0035] (3) At the same time, the low-speed rotation of the dehydration carbonization barrel during the low-temperature baking process can enhance the interaction between the baking solid products and the exhaust gas, promote the reorganization of small molecule organic substances and pollutant components by the active sites on the surface of coke, thereby increasing the yield of baking solids on the one hand and reducing the production of large molecule organic pollutants on the other.

[0036] (4) The solid material after low-temperature baking and carbonization is easy to transport and can be used as carbon fertilizer or further processed to prepare charcoal and activated carbon, which can improve the added value and economy of organic solid waste treatment products such as kitchen waste.

[0037] (5) Through the integrated design of the dehydration carbonization barrel and the microwave generator, centrifugal dehydration and low-temperature baking are carried out in the same space in sequence. The structure is simple and the design is compact. The dehydration carbonization barrel can fully dehydrate the high water content organic solid waste such as kitchen waste, reduce the volume of the high water content organic solid waste such as kitchen waste, and reduce the weight of the high water content organic solid waste such as kitchen waste. The wastewater generated by dehydration can be discharged for oil-water separation treatment and then collected. The low-temperature baking of the dehydrated kitchen waste and other organic solid waste by the microwave generator can make the kitchen waste and other organic solid waste carbonized, solve the problems of odor and bacterial growth caused by the putrefaction of the high water content organic solid waste during storage and transportation, and at the same time, various carbon materials can be prepared, thus achieving the technical purpose of resource-based treatment of high water content organic solid waste such as kitchen waste.

[0038] (6) The present invention can also meet the needs of miniaturization and distributed processing. It can be used as a household device or for centralized treatment of high water content organic solid waste such as kitchen waste in catering clusters, thereby effectively reducing secondary environmental pollution caused by the storage and transportation of high water content organic solid waste such as kitchen waste.

[0039] (7) Compared with the traditional extrusion followed by pyrolysis or pulverization process, the present invention not only has a simple structure and high comprehensive conversion rate, but also achieves a baking material recovery rate of more than 80% and an energy recovery rate of more than 85% through the comprehensive design of the system. At the same time, the NOx in the baking exhaust gas can be reduced by 60% and the VOCs can be reduced by more than 85% compared with the existing baking devices.

[0040] In summary, the integrated design of centrifugal dehydration and low-temperature baking of this invention allows centrifugal dehydration and low-temperature baking to be carried out sequentially in the same space. It has a simple structure, high baking thermal efficiency, and can significantly reduce the generation of gases such as CO, NOx, and volatile organic compounds (VOCs), increase the yield of baking solids, reduce the production of macromolecular organic pollutants, and increase the added value of products treated with high-moisture organic solid waste such as kitchen waste. It also has significant environmental benefits. Attached Figure Description

[0041] Figure 1 This is an axis view of the integrated device for dewatering and low-temperature baking of high-moisture organic solid waste according to the present invention. Figure 1 .

[0042] Figure 2 This is an axis view of the integrated device for dewatering and low-temperature baking of high-moisture organic solid waste according to the present invention. Figure 2 .

[0043] Figure 3 This is a front view of the integrated device for dehydrating and baking high-moisture organic solid waste at low temperature according to the present invention.

[0044] Figure 4 yes Figure 3 Sectional view along the AA direction.

[0045] Figure 5 This is a schematic diagram of the structure of the integrated device for dehydrating and baking high-moisture organic solid waste at low temperature according to the present invention after removing the outer shell.

[0046] Figure 6 This is a schematic diagram of the structure of the integrated device for dehydrating and baking high-moisture organic solid waste at low temperature according to the present invention after removing the outer shell and outer barrel.

[0047] In the diagram: 1. Top cover; 2. Outer shell; 3. Outer barrel; 4. Dehydration and carbonization barrel; 5. Water spray ring; 6. Microwave generator; 7. Barrel lid; 8. Microwave transmission hole; 9. Motor; 10. Gearbox; 11. Drain pipe; 12. Exhaust pipe; 13. Heat dissipation fins; 14. Condenser fan; 15. Three-way solenoid valve; 16. Drain pipe. Detailed Implementation

[0048] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0049] like Figure 1-6 As shown, an integrated device for dewatering and low-temperature baking of high-moisture organic solid waste includes an outer shell 2 with a top cover 1, an outer barrel 3, a dewatering carbonization barrel 4, a micro-oxygen control module, a rinsing module, a microwave generator 6, a rotary drive module, a drainage and exhaust module, and a controller (not shown).

[0050] The outer barrel 3 is fixedly installed in the outer casing 2;

[0051] The dehydration carbonization tank 4 is rotated and installed in the outer tank 3, and is used for the preliminary solid-liquid separation treatment of high water content organic solid waste such as kitchen waste;

[0052] The micro-oxygen control module is connected to the outer tank 3 and is used to create a micro-oxygen environment inside the outer tank 3 and control the oxygen content inside the outer tank 3.

[0053] The rinsing module is installed on the top of the outer tub 3 and is used to rinse the inner wall of the outer tub 3;

[0054] Microwave generator 6 is installed on top cover 1 and corresponds to the outer barrel 3, and is used to bake and carbonize organic solid waste such as kitchen waste after dehydration in dehydration carbonization barrel 4.

[0055] The rotary drive module is installed in the outer casing 2 and is connected to the dehydration carbonization barrel 4 for driving the dehydration carbonization barrel 4 to rotate;

[0056] The drainage and venting module is installed in the outer casing 2 and connected to the bottom of the outer tub 3, and is used to discharge the liquid generated during dehydration and rinsing as well as the gas generated during baking;

[0057] The controller is connected to the micro-oxygen control module, the rinsing module, the microwave generator 6, the rotary drive module, and the drainage and exhaust module, respectively.

[0058] In this embodiment, the outer barrel 3 is fixedly supported in the outer shell 2 using a fixing bracket. The fixing bracket is not shown in the figure.

[0059] In this embodiment, the wall of the dehydration carbonization tank 4 is evenly distributed with dehydration holes (not shown in the figure), and the diameter of the dehydration holes gradually decreases from top to bottom (the beneficial effects can be briefly described). The bottom of the dehydration carbonization tank 4 is rotatably mounted inside the bottom of the outer tank 3. Because the diameter of the dehydration holes gradually decreases from top to bottom, during centrifugal dehydration, solid matter can be evenly distributed inside the dehydration carbonization tank 4 (large particles on top, small particles on the bottom), reducing clogging of the dehydration holes, thereby improving dehydration efficiency and reducing solid matter loss.

[0060] In this embodiment, the micro-oxygen control module includes a nitrogen cylinder and an oxygen concentration detector. The nitrogen cylinder is located on the outer side of the outer casing 2. A gas supply pipe, passing through a side plate of the outer casing 2, connects the outlet of the nitrogen cylinder to the wall of the outer casing 3. A first solenoid valve is installed on the gas supply pipe. The oxygen concentration detector is installed on the upper part of the wall of the outer casing 3. The controller is connected to both the oxygen concentration detector and the first solenoid valve. The nitrogen cylinder, oxygen concentration detector, gas supply pipe, and first solenoid valve are not shown in the figure. The nitrogen cylinder can supply nitrogen to the outer casing 3, creating a micro-oxygen environment inside the outer casing 3.

[0061] In this embodiment, the rinsing module includes a water spray ring 5, which is fixedly installed on the upper inner circle of the outer tub 3. The bottom of the water spray ring 5 is evenly provided with several spray holes that spray downwards toward the inner wall of the outer tub 3. The water spray ring 5 is connected to a tap water pipe. A booster pump and a second solenoid valve are provided on the tap water pipe along the fluid direction. The controller is connected to the booster pump and the second solenoid valve respectively.

[0062] In this embodiment, the microwave generating device 6 mainly consists of a microwave generator and a waveguide. The microwave generating device 6 is fixedly installed on the inner top surface of the top cover 1. A bucket lid 7, which covers the microwave generating device 6 and is adapted to the top of the outer bucket 3, is also fixedly installed on the inner top surface of the top cover 1. A microwave transmission hole 8 is opened on the bucket lid 7 corresponding to the waveguide position. The microwave generating device 6 emits microwaves through the microwave transmission hole 8. When the top cover 1 is sealed and fastened to the top of the outer shell 2, the bucket lid 7 is correspondingly sealed and fastened to the top of the outer bucket 3. The controller is connected to the microwave generator. The microwave generating device 6 is a conventional technology.

[0063] In this embodiment, the rotary drive module includes a motor 9 and a gearbox 10. Both the motor 9 and the gearbox 10 are installed in the housing 2. The gearbox 10 is located directly below the outer barrel 3. The output shaft of the gearbox 10 is coaxially rotatably connected to the bottom of the outer barrel 3. The output shaft of the gearbox 10 is rotatably and sealed to the bottom of the outer barrel 3. The upper end of the output shaft of the gearbox 10 is fixedly fitted into the bottom center of the dehydration carbonization barrel 4. The input shaft of the gearbox 10 is connected to the motor shaft of the motor 9 via a track (not shown). The controller is connected to the motor 9.

[0064] In this embodiment, the drainage and venting module includes a three-way solenoid valve 15, a drain pipe 11, a drain pipe 16, and an venting pipe 12. The first interface of the three-way solenoid valve 15 is fixedly connected to the bottom of the outer tub 3. The drain pipe 11 and the drain pipe 16 are vertically arranged in the outer casing 2 and located below the outer tub 3. The upper end of the drain pipe 11 is connected to the second interface of the three-way solenoid valve 15, and the upper end of the drain pipe 16 is connected to the third interface of the three-way solenoid valve 15. The lower end of the drain pipe 11 extends downward to the bottom of the inner casing 2 and then bends horizontally backward, extending out from the lower part of the rear side plate of the outer casing 2. After exiting from the rear side of 2, it connects to the sewage pipe. The lower end of the drain pipe 16 exits from one side of the outer shell 2 and is connected to an oil-water separator. The water outlet of the oil-water separator is connected to the sewage pipe, and the oil outlet of the oil-water separator is connected to an oil storage tank. The exhaust pipe 12 is vertically installed in the outer shell 2 and located at the rear side of the outer barrel 3. The lower end of the exhaust pipe 12 is connected to the upper part of the horizontal section of the sewage pipe 11. The upper end of the exhaust pipe 12 extends upward to the upper part of the inner shell 2 and bends horizontally backward. The upper end of the exhaust pipe 12 is fixedly connected to the upper part of the rear side plate of the outer shell 2 and communicates with the outside atmosphere. The controller is connected to the three-way solenoid valve 15.

[0065] When the three-way solenoid valve 15 is energized, its first and second ports are connected, and its third port is closed; when the three-way solenoid valve 15 is de-energized, its first and third ports are connected, and its second port is closed. Neither the oil-water separator nor the oil storage tank is shown in the diagram; the oil-water separator is a conventional technology.

[0066] In this embodiment, several heat dissipation fins 13 are fixedly installed on the outer walls of both the vertical and horizontal sections of the drain pipe 11. A condenser fan 14, which blows air towards the heat dissipation fins 13, is fixedly installed inside the outer casing 2. The controller is connected to the condenser fan 14. The heat dissipation fins 13 increase the heat dissipation area of ​​the drain pipe 11, and the condenser fan 14 increases the convection velocity, accelerating heat dissipation and rapidly cooling the baking exhaust gas entering the drain pipe 11, thus condensing and removing condensable substances from the baking exhaust gas.

[0067] In this embodiment, the rear side of the top cover 1 is hinged to the upper edge of the rear side plate of the outer shell 2, and hydraulic buffers are connected to the left and right sides of the top cover 1 and the outer shell 2 respectively. The hydraulic buffers are not shown in the figure. The hydraulic buffers protect the top cover 1 when it falls and closes, and have a damping effect.

[0068] To prevent microwave leakage, a coating material can be applied to the inner wall of the outer barrel 3 and the surface of the lid 7. The edge of the lid 7 is provided with a sealing strip that fits tightly against the inner wall of the upper edge of the outer barrel 3.

[0069] Using the above technical solution, a method for using an integrated device for dewatering and low-temperature baking of high-moisture organic solid waste includes the following steps:

[0070] Open the top cover 1 and pour the kitchen waste and other high-moisture organic solid waste into the dehydration carbonization bucket 4. Then close the top cover 1 and the bucket cover 7 is also sealed and fastened to the top of the outer bucket 3 to seal the outer bucket 3. Start the device, and the controller controls the motor 9 to work. The first and second solenoid valves are in the closed state, the three-way solenoid valve 15 is de-energized, the first and third interfaces of the three-way solenoid valve 15 are connected, the second interface of the three-way solenoid valve 15 is closed, and the outer bucket 3 is connected to the drain pipe 16. Then the motor 9 drives the dehydration carbonization bucket 4 to rotate at low speed and then high speed through the gearbox 10 to perform preliminary solid-liquid separation on the kitchen waste and other high-moisture organic solid waste, so that the kitchen waste and other high-moisture organic solid waste are dehydrated. The wastewater generated by dehydration is discharged through the drain pipe 16 and enters the oil-water separator tank. The wastewater is separated into oil and water through a hydrophilic and oleophobic film in the oil-water separator tank. The water after oil-water separation is discharged from the water outlet of the oil-water separator tank into the sewage pipe, while the separated oil enters the oil storage tank from the oil outlet of the oil-water separator tank for recovery.

[0071] After the high-moisture organic solid waste such as kitchen waste is dehydrated, the motor 9 stops working, the booster pump is started, the second solenoid valve is opened, and the water in the tap water pipe is pressurized and enters the spray ring 5. The water in the spray ring 5 is then sprayed obliquely downward through each spray hole to rinse the inner wall of the outer bucket 3. Similarly, the sewage generated from rinsing is discharged through the drain pipe 16 and enters the oil-water separator tank. In the oil-water separator tank, the sewage is separated into oil and water through a hydrophilic and oleophobic membrane. The water after oil-water separation is discharged from the outlet of the oil-water separator tank into the sewage pipe, while the separated oil enters the oil storage tank from the oil outlet of the oil-water separator tank for recycling.

[0072] After rinsing, the booster pump stops working, the second solenoid valve closes, the three-way solenoid valve 15 is energized, the first port of the three-way solenoid valve 15 is connected to the second port, the third port of the three-way solenoid valve 15 is closed, and the outer barrel 3 is connected to the drain pipe 11. Before the microwave generator 6 starts working, the nitrogen cylinder valve and the first solenoid valve are opened, so that the nitrogen in the nitrogen cylinder is purged through the gas delivery pipe to the inside of the outer barrel 3, so that the oxygen content in the outer barrel 3 is reduced to form a micro-oxygen environment. At the same time, the oxygen content in the outer barrel 3 is monitored by the oxygen concentration detector. When the oxygen content is between 1-18% VOL, the microwave generator 6 starts working.

[0073] The microwave generator 6 heats dehydrated kitchen waste and other organic solid waste at 180-350℃ using microwaves, achieving low-temperature baking of the kitchen waste and other organic solid waste. This allows the kitchen waste and other organic solid waste to be baked and carbonized. Most of the VOCs can be burned under the action of microwaves and micro-oxygen, thus providing some of the energy required for baking and further reducing the generation of VOCs and other pollutants. During the low-temperature baking process, the motor 9 works. The motor 9 drives the dehydrated carbonization barrel 4 to rotate at low speed through the gearbox 10, which can enhance the interaction between the baked solid products and the exhaust gas, promote the reforming of small molecule organic matter and pollutant components by the active sites on the coke surface, thereby increasing the yield of baked solids on the one hand and reducing the production of large molecule organic pollutants on the other.

[0074] During the low-temperature baking process, the baking exhaust gas generated enters the drain pipe 11. At the same time, the condenser fan 14 works, so that the baking exhaust gas entering the drain pipe 11 is cooled by the heat dissipation fins 13. After the condensable substances in the baking exhaust gas are condensed and removed, the baking exhaust gas is discharged through the exhaust pipe 12. After the condensable substances are condensed, they are directly discharged into the sewage pipe from the lower end of the drain pipe 11.

[0075] After the low-temperature baking is completed, close the nitrogen cylinder valve and the first solenoid valve, turn off the microwave generator 6, the motor 9 and the condenser fan 14, open the top cover 1 and take out the carbonized material.

[0076] Carbonized materials can be used as charcoal fertilizer or have their calorific value further increased to make barbecue charcoal sticks. They can also be further processed to be used as activated carbon.

[0077] This invention is mainly used for the treatment of kitchen waste, but it can also be used for the treatment of sludge and other organic solid wastes with high water content, and has a wide range of applications.

[0078] 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 preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. An integrated device for dewatering and low-temperature baking of high-moisture organic solid waste, characterized in that: The system includes an outer shell with a top cover, an outer barrel, a dehydration and carbonization barrel, a micro-oxygen control module, a rinsing module, a microwave generator, a rotation drive module, a drainage and exhaust module, and a controller. The outer barrel is fixedly installed in the outer shell. The dehydration and carbonization barrel is rotatably positioned inside the outer barrel for preliminary solid-liquid separation treatment of high-moisture organic solid waste. The micro-oxygen control module is connected to the outer barrel to create a micro-oxygen environment and control the oxygen content inside the outer barrel. The rinsing module is installed on the top of the outer barrel for rinsing the inner wall of the outer barrel. The microwave generator is installed on the top cover and corresponds to the outer barrel, for baking and carbonizing the dehydrated organic solid waste inside the dehydration and carbonization barrel. The rotation drive module is installed in the outer shell and is connected to the dehydration and carbonization barrel for driving the dehydration and carbonization barrel to rotate. The drainage and exhaust module is located in the outer shell and connected to the bottom of the outer barrel for discharging the liquid generated during dehydration and rinsing, as well as the gas generated during baking. The controller is connected to the micro-oxygen control module, the rinsing module, the microwave generator, the rotation drive module, and the drainage and exhaust module. The walls of the dehydration carbonization barrel are evenly distributed with dehydration holes, the diameter of which gradually decreases from top to bottom. The bottom of the dehydration carbonization barrel is rotatably installed inside the outer barrel. The micro-oxygen control module includes a nitrogen cylinder and an oxygen concentration detector. The nitrogen cylinder is located on the outer side of the outer shell. A gas supply pipe that passes through one side plate of the outer shell is connected between the gas outlet of the nitrogen cylinder and the wall of the outer barrel. A first solenoid valve is installed on the gas supply pipe. The oxygen concentration detector is installed on the upper part of the wall of the outer barrel. The controller is connected to the oxygen concentration detector and the first solenoid valve respectively. The microwave generator mainly consists of a microwave generator and a waveguide. The microwave generator is fixedly installed on the inner top surface of the top cover. A bucket lid that covers the outside of the microwave generator and is adapted to the top of the outer bucket is also fixedly installed on the inner top surface of the top cover. A microwave transmission hole is opened on the bucket lid corresponding to the waveguide position. The microwave generator emits microwaves from the microwave transmission hole. When the top cover is sealed and fastened to the top of the outer shell, the bucket lid is correspondingly sealed and fastened to the top of the outer bucket. The controller is connected to the microwave generator. The drainage and venting module includes a three-way solenoid valve, a drain pipe, a drain pipe, and an vent pipe. The first port of the three-way solenoid valve is fixedly connected to the bottom of the outer tub. The drain pipe and drain pipe are vertically arranged inside the outer casing and located below the outer tub. The upper end of the drain pipe connects to the second port of the three-way solenoid valve, and the upper end of the drain pipe connects to the third port of the three-way solenoid valve. The lower end of the drain pipe extends downward to the bottom of the outer casing, then bends horizontally backward and extends out from the lower part of the rear side panel of the outer casing. The lower end of the drain pipe connects to the sewage pipe after exiting from the rear side of the outer casing. The lower end of the drain pipe exits from one side of the outer casing and is connected to an oil-water separator. The outlet of the oil-water separator is connected to... The sewage pipeline is connected, and the oil outlet of the oil-water separator is connected to an oil storage tank. The exhaust pipe is vertically installed inside the outer casing and located at the rear of the outer tank. The lower end of the exhaust pipe is connected to the upper part of the horizontal section of the sewage pipe, and the upper end of the exhaust pipe extends upward to the upper part of the inner casing and bends horizontally backward. The upper end of the exhaust pipe is fixedly connected to the upper side of the rear side plate of the outer casing and communicates with the outside atmosphere. The controller is connected to a three-way solenoid valve. When the three-way solenoid valve is energized, the first and second ports of the three-way solenoid valve are connected, and the third port of the three-way solenoid valve is closed. When the three-way solenoid valve is de-energized, the first and third ports of the three-way solenoid valve are connected, and the second port of the three-way solenoid valve is closed.

2. The integrated device for dewatering and low-temperature baking of high-moisture organic solid waste according to claim 1, characterized in that: The rinsing module includes a water spray ring, which is fixedly installed on the upper inner circle of the outer tub. The bottom of the water spray ring has several spray holes evenly distributed circumferentially, which spray downwards toward the inner wall of the outer tub. The water spray ring is connected to a tap water pipe. A booster pump and a second solenoid valve are installed on the tap water pipe along the fluid direction. The controller is connected to the booster pump and the second solenoid valve respectively.

3. The integrated device for dewatering and low-temperature baking of high-moisture organic solid waste according to claim 1, characterized in that: The rotary drive module includes a motor and a gearbox, both of which are installed in the housing. The gearbox is located directly below the outer barrel. The output shaft of the gearbox is coaxially rotatably connected to the bottom of the outer barrel. The output shaft of the gearbox is rotatably and sealed to the bottom of the outer barrel. The upper end of the output shaft of the gearbox is fixedly fitted into the bottom center of the dehydration and carbonization barrel. The input shaft of the gearbox is connected to the motor shaft of the motor via a track drive. The controller is connected to the motor.

4. The integrated device for dewatering and low-temperature baking of high-moisture organic solid waste according to claim 1, characterized in that: Several heat dissipation fins are fixedly installed on the outer walls of both the vertical and horizontal sections of the sewage pipe. A condenser fan that blows air toward the heat dissipation fins is fixedly installed inside the outer casing, and the controller is connected to the condenser fan.

5. The integrated device for dewatering and low-temperature baking of high-moisture organic solid waste according to claim 4, characterized in that: The rear side of the top cover is hinged to the upper edge of the rear side plate of the outer shell, and hydraulic buffers are connected to the left and right sides of the top cover and the outer shell respectively.

6. The method of using the integrated device for dewatering and low-temperature baking of high-moisture organic solid waste as described in claim 5, characterized in that: Includes the following steps: Open the top cover and pour kitchen waste and other high-moisture organic solid waste into the dehydration carbonization barrel. Then close the top cover, and the barrel lid should be sealed to the top of the outer barrel. Start the device; the controller will operate the motor. The first and second solenoid valves will be closed, the three-way solenoid valve will be de-energized, the first and third ports of the three-way solenoid valve will be connected, and the second port will be closed. The outer barrel will be connected to the drain pipe. The motor will then drive the dehydration carbonization barrel to rotate at low speed and then high speed through the gearbox, performing preliminary solid-liquid separation on the high-moisture organic solid waste, thus dehydrating it. The wastewater generated during dehydration will be discharged through the drain pipe and enter the oil-water separator. In the oil-water separator, the wastewater will undergo hydrophilic separation... Oil-water separation is achieved through an oleophobic membrane. The water after separation is discharged from the outlet of the oil-water separator tank into the sewage pipe, while the separated oil enters the oil storage tank from the oil outlet for recovery. After dehydration of the high-moisture organic solid waste, the motor stops, the booster pump is started, and the second solenoid valve is opened, pressurizing the water in the tap water pipe and allowing it to enter the spray ring. The water in the spray ring is then sprayed obliquely downwards through various nozzles to rinse the inner wall of the outer tank. Similarly, the wastewater generated from rinsing is discharged through the drain pipe and enters the oil-water separator tank. In the oil-water separator tank, the wastewater undergoes oil-water separation through a hydrophilic-oleophobic membrane. The water after separation is discharged from the outlet of the oil-water separator tank into the sewage pipe, while the separated oil enters the oil storage tank from the oil outlet. The oil outlet of the separator enters the storage tank for recovery; after flushing, the booster pump stops working, the second solenoid valve closes, the three-way solenoid valve is energized, the first and second ports of the three-way solenoid valve are connected, the third port of the three-way solenoid valve is closed, and the outer tank is connected to the drain pipe. Before the microwave generator starts working, the nitrogen cylinder valve and the first solenoid valve are opened, allowing nitrogen from the nitrogen cylinder to purge the inside of the outer tank through the gas delivery pipe, reducing the oxygen content inside the outer tank and creating a micro-oxygen environment. At the same time, the oxygen content inside the outer tank is monitored by an oxygen concentration detector. When the oxygen content is between 1-18% VOL, the microwave generator starts working; the microwave generator uses microwaves at 180-350℃ to heat the dehydrated oil... The organic solid waste is heated to achieve low-temperature baking, which carbonizes the organic solid waste. During the low-temperature baking process, the motor works, and the motor drives the dehydration carbonization barrel to rotate at low speed through the gearbox. The baking exhaust gas generated during the low-temperature baking process enters the sewage pipe, and at the same time, the condenser fan works, so that the baking exhaust gas entering the sewage pipe is cooled by the heat dissipation fins. After the condensable substances in the baking exhaust gas are condensed and removed, the baking exhaust gas is discharged through the exhaust pipe. The condensable substances are discharged directly into the sewage pipe from the lower end of the sewage pipe. After the low-temperature baking is completed, the nitrogen cylinder valve and the first solenoid valve are closed, the microwave generator, the motor and the condenser fan are turned off, the top cover is opened and the carbonized material is taken out.

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