Wet garbage treatment system and treatment method thereof

Abstract

According to the wet garbage treatment system and the treatment method thereof provided by the invention, a hydrothermal carbonization method and a microwave carbonization method are combined, so that the stable quality of a product is ensured, and meanwhile, generated harmful gases are reduced. An outlet of the sorting device is connected with an inlet of the particle preparation device, an outlet of the particle preparation device is connected with an inlet of the drying device, an outlet of the drying device is connected with an inlet of the post-drying buffer tank, and an outlet of the post-drying buffer tank is connected with an inlet of the hydrothermal carbonization device. An outlet of the hydrothermal carbonization device is connected with an inlet of the post-hydrothermal carbonization buffer tank, an outlet of the post-hydrothermal carbonization buffer tank is connected with an inlet of the microwave carbonization device, and an outlet of the microwave carbonization device is connected with an inlet of the carbon block preparation device; a waste gas outlet of the drying device and a waste gas outlet of the microwave carbonization device are connected with the hydrothermal carbonization device; a waste gas outlet of the hydrothermal carbonization device is connected with the waste gas treatment device; a waste liquid outlet of the particle preparation device is connected with the waste liquid treatment device.

Description

Technical Field

[0001] The invention relates to a wet garbage processing system and a processing method thereof. Background Art

[0002] Wet garbage refers to the garbage generated in residents' daily life, food processing, catering services, and corporate catering activities, including discarded vegetable leaves, leftovers, leftover rice, fruit peels, eggshells, tea dregs, bones, etc. Its main sources are family kitchens, restaurants, canteens, markets, and other industries related to food processing. Wet garbage contains extremely high moisture and organic matter, is easy to rot, and produces a foul odor, so it must be properly handled and processed.

[0003] The wet garbage carbonization process is a process that converts wet garbage into carbon, which can reduce the volume of garbage, reduce environmental pollution and achieve resource recycling, as shown in the Chinese patent application number 2020109933122. The wet garbage carbonization process includes hydrothermal carbonization and microwave carbonization, which can convert wet garbage into activated carbon and biochar, two high-value carbons.

[0004] The quality of the product of the hydrothermal carbonization method is unstable. The quality of the product is affected by the operating conditions. It is difficult to obtain an ideal product by temperature and pressure control alone, and it is difficult to ensure the stability of the product quality. Although the product quality of the microwave carbonization method is more stable than that of the hydrothermal carbonization method, the microwave carbonization method produces more harmful gases than the hydrothermal carbonization method. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a wet garbage treatment system and a treatment method with a rational structural design, which combines hydrothermal carbonization and microwave carbonization to ensure stable product quality while reducing the generation of harmful gases.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows: A wet waste treatment system, characterized in that it includes a sorting device, a material particle preparation device, a drying device, a post-drying buffer tank, a hydrothermal carbonization device, a post-hydrothermal carbonization buffer tank, a microwave carbonization device, a carbon block preparation device, an exhaust gas treatment device, and a waste liquid treatment device; a sorting robot, a recycling sorter, and a waste storage box are arranged in the sorting device, the material outlet of the sorting device is connected to the material inlet of the material particle preparation device, the material outlet of the material particle preparation device is connected to the material inlet of the drying device, the material outlet of the drying device is connected to the material inlet of the post-drying buffer tank, the material outlet of the post-drying buffer tank is connected to the material inlet of the hydrothermal carbonization device, the material outlet of the hydrothermal carbonization device is connected to the material inlet of the post-hydrothermal carbonization buffer tank, and the material outlet of the post-hydrothermal carbonization buffer tank is connected to the material inlet of the microwave carbonization device; the exhaust gas outlets of the drying device and the microwave carbonization device are both connected to the hydrothermal carbonization device; the exhaust gas outlet of the hydrothermal carbonization device is connected to the exhaust gas treatment device; the waste liquid outlet of the material particle preparation device is connected to the waste liquid treatment device, and the waste liquid treatment device includes an oil-water separation device and a post-waste liquid treatment device, the waste liquid outlet of the material particle preparation device is connected to the inlet of the oil-water separation device, and the outlet of the oil-water separation device is connected to the inlet of the post-waste liquid treatment device.

[0007] The drying device described in the present invention adopts a tunnel microwave device.

[0008] A carbon block conveyor belt is arranged in the carbon block preparation device described in the present invention.

[0009] The present invention further includes an exhaust gas recovery pipeline, and the exhaust gas outlets of the drying device and the microwave carbonization device are both connected to the hydrothermal carbonization device through the exhaust gas recovery pipeline.

[0010] A treatment method for a wet waste treatment system, characterized in that it includes the following steps: (1) Put the wet waste into the sorting device for sorting; the recycling sorter classifies and recycles metals, glass, and batteries; the sorting robot sorts and recycles other wastes that are inconvenient to classify and carbonize, and puts the wastes into the waste storage box; (2) The sorted wet waste enters the material particle preparation device, and after the material particle preparation device presses and breaks the wet waste, the wet waste is then prepared into granular materials; (3) The granular materials enter the drying device, and the drying device dries the granular materials; (4) The dried granular materials enter the post-drying buffer tank for storage; (5) The granular materials in the post-drying buffer tank enter the hydrothermal carbonization device for hydrothermal carbonization process; (6) The materials after hydrothermal carbonization enter the post-hydrothermal carbonization buffer tank for storage; (7) After hydrothermal carbonization, the materials in the buffer tank enter the microwave carbonization device for microwave carbonization process; (8) The material from the microwave carbonization process enters the carbon block preparation device, and the carbon block preparation device prepares the finished carbon blocks; (9) The exhaust gas from the drying device and the microwave carbonization device is introduced into the hydrothermal carbonization device as the fuel gas for secondary combustion of the hydrothermal carbonization device; the exhaust gas from the hydrothermal carbonization device is introduced into the exhaust gas treatment device for air intake and exhaust gas treatment; (10) The waste liquid generated by the material particle preparation device enters the oil-water separation device for oil-water separation, and the waste liquid enters the waste liquid post-treatment device for further post-treatment.

[0011] In step (3) of the present invention, the dried granular material can not only be used as a raw material for carbon production in the wet garbage treatment system, but also can be taken out and used as a breeding material for breeding black soldier flies.

[0012] Compared with the prior art, the present invention has the following advantages and effects: the hydrothermal carbonization method and the microwave carbonization method are combined to ensure the stable quality of the product and to produce stable activated carbon and biochar; at the same time, the waste gas generated by the microwave carbonization method is used as the fuel gas for the hydrothermal carbonization method for secondary combustion, which not only treats the waste gas but also saves energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0015] The wet garbage treatment system of the embodiment of the present invention includes a sorting device 1, a material particle preparation device 2, a drying device 3, a post-drying buffer tank 4, a hydrothermal carbonization device 5, a post-hydrothermal carbonization buffer tank 6, a microwave carbonization device 7, a carbon block preparation device 8, a waste gas treatment device 10, a waste liquid treatment device and an intelligent control cabinet 13.

[0016] The sorting device 1 is provided with a sorting robot 101, a recycling and sorting machine 102, and a waste storage bin 103. The material outlet of the sorting device 1 is connected to the material inlet of the material particle preparation device 2. The material outlet of the material particle preparation device 2 is connected to the material inlet of the drying device 3. The material outlet of the drying device 3 is connected to the material inlet of the post-drying buffer tank 4. The drying device 3 adopts a tunnel microwave device. The material outlet of the post-drying buffer tank 4 is connected to the material inlet of the hydrothermal carbonization device 5. The material outlet of the hydrothermal carbonization device 5 is connected to the material inlet of the post-hydrothermal carbonization buffer tank 6. The material outlet of the post-hydrothermal carbonization buffer tank 6 is connected to the material inlet of the microwave carbonization device 7. The material outlet of the microwave carbonization device 7 is connected to the material inlet of the carbon block preparation device 8. The carbon block preparation device 8 is provided with a carbon block conveyor belt 801.

[0017] The exhaust gas outlets of the drying device 3 and the microwave carbonization device 7 are both connected to the hydrothermal carbonization device 5 through an exhaust gas recovery pipeline 9.

[0018] The exhaust gas outlet of the hydrothermal carbonization device 5 is connected to the exhaust gas treatment device 10.

[0019] The waste liquid outlet of the material particle preparation device 2 is connected to a waste liquid treatment device. The waste liquid treatment device includes an oil-water separation device 11 and a post-waste liquid treatment device 12. The waste liquid outlet of the material particle preparation device 2 is connected to the inlet of the oil-water separation device 11. The outlet of the oil-water separation device 11 is connected to the inlet of the post-waste liquid treatment device 12.

[0020] The intelligent control cabinet 13 is used to intelligently control each device of the system to achieve intelligent production.

[0021] A treatment method for a wet waste treatment system includes the following steps: (1) Put the wet waste into the sorting device 1 for sorting; the recycling and sorting machine 102 classifies and recycles metals, glass, batteries, etc.; the sorting robot 101 sorts and recycles other waste that is inconvenient to classify and carbonize, and puts the waste into the waste storage bin 103.

[0022] (2) The sorted wet waste enters the material particle preparation device 2. After the material particle preparation device 2 presses and breaks the wet waste, the wet waste is then prepared into granular materials.

[0023] (3) The granular materials enter the drying device 3, and the drying device 3 dries the granular materials. After drying, the moisture content of the granular materials decreases, which not only increases the shelf life of the granular materials but also facilitates packaging and transportation. These granular materials can be used not only as raw materials for carbon production in this system but also can be taken out of this system and used as breeding materials for breeding species such as black soldier fly.

[0024] (4) The dried granular material enters the post-drying buffer tank 4 for storage to adapt to the production rhythm.

[0025] (5) After drying, the granular material in the buffer tank 4 enters the hydrothermal carbonization device 5 for a hydrothermal carbonization process.

[0026] (6) The material after hydrothermal carbonization enters the post-hydrothermal carbonization buffer tank 6 for storage to adapt to the production rhythm.

[0027] (7) After hydrothermal carbonization, the material in the buffer tank 6 enters the microwave carbonization device 7 for microwave carbonization process.

[0028] (8) The material of the microwave carbonization process enters the carbon block preparation device 8, and the carbon block preparation device 8 prepares the finished carbon blocks, which are output by the finished carbon block conveyor belt 801.

[0029] (9) The exhaust gas from the drying device 3 and the microwave carbonization device 7 contains combustible gases such as methane. The exhaust gas from the drying device 3 and the microwave carbonization device 7 is introduced into the hydrothermal carbonization device 5 as the fuel gas for secondary combustion of the hydrothermal carbonization device 5, which not only treats the exhaust gas but also saves energy. The exhaust gas from the hydrothermal carbonization device 5 is introduced into the exhaust gas treatment device 10 for exhaust gas treatment. The treated exhaust gas is pollution-free, colorless, and odorless and can be discharged after meeting the standards.

[0030] (10) The waste liquid generated by the material particle preparation device 2 enters the oil-water separation device 11 for oil-water separation, and the waste liquid enters the waste liquid post-treatment device 12 for further post-treatment. The treated waste liquid is pollution-free, colorless, and odorless, and can be discharged after meeting the standards.

[0031] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. Any equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention.

Claims

1. A wet garbage treatment system, characterized in that: The invention comprises a sorting device, a material particle preparation device, a drying device, a post-drying buffer tank, a hydrothermal carbonization device, a post-hydrothermal carbonization buffer tank, a microwave carbonization device, a carbon block preparation device, a waste gas treatment device and a waste liquid treatment device; the sorting device is provided with a sorting robot, a recycling sorting machine and a waste storage box, the material outlet of the sorting device is connected to the material inlet of the material particle preparation device, the material outlet of the material particle preparation device is connected to the material inlet of the drying device, the material outlet of the drying device is connected to the material inlet of the post-drying buffer tank, the material outlet of the post-drying buffer tank is connected to the material inlet of the hydrothermal carbonization device, the material outlet of the hydrothermal carbonization device is connected to the water The material inlet of the buffer tank after thermal carbonization is connected, the material outlet of the buffer tank after hydrothermal carbonization is connected to the material inlet of the microwave carbonization device, and the material outlet of the microwave carbonization device is connected to the material inlet of the carbon block preparation device; the exhaust gas outlet of the drying device and the exhaust gas outlet of the microwave carbonization device are both connected to the hydrothermal carbonization device; the exhaust gas outlet of the hydrothermal carbonization device is connected to the exhaust gas treatment device; the waste liquid outlet of the material particle preparation device is connected to the waste liquid treatment device, the waste liquid treatment device includes an oil-water separation device and a waste liquid post-treatment device, the waste liquid outlet of the material particle preparation device is connected to the inlet of the oil-water separation device, and the outlet of the oil-water separation device is connected to the inlet of the waste liquid post-treatment device.

2. The wet garbage treatment system according to claim 1, characterized in that: The drying device adopts a tunnel microwave device.

3. The wet garbage treatment system according to claim 1, characterized in that: The carbon block preparation device is provided with a carbon block conveyor belt.

4. The wet garbage treatment system according to claim 1, characterized in that: It also includes a waste gas recovery pipeline, and the waste gas outlet of the drying device and the waste gas outlet of the microwave carbonization device are both connected to the hydrothermal carbonization device through the waste gas recovery pipeline.

5. A method for treating wet garbage according to any one of claims 1 to 4, characterized in that: The steps include: (1) Wet garbage is placed in a sorting device for sorting; the recycling sorting machine sorts and recycles metals, glass, and batteries; the sorting robot sorts and recycles other waste that is inconvenient to be sorted and recycled and carbonized, and puts the waste into a waste storage box; (2) The sorted wet garbage enters the material particle preparation device, which squeezes and breaks the wet garbage into granular materials; (3) The granular material enters the drying device, and the drying device dries the granular material; (4) The dried granular material enters the post-drying buffer tank for storage; (5) After drying, the granular materials in the buffer tank enter the hydrothermal carbonization device for hydrothermal carbonization process; (6) The materials after hydrothermal carbonization enter the post-hydrothermal carbonization buffer tank for storage; (7) After hydrothermal carbonization, the materials in the buffer tank enter the microwave carbonization device for microwave carbonization process; (8) The material from the microwave carbonization process enters the carbon block preparation device, and the carbon block preparation device prepares the finished carbon blocks; (9) The exhaust gas from the drying device and the microwave carbonization device is introduced into the hydrothermal carbonization device as the fuel gas for secondary combustion of the hydrothermal carbonization device; the exhaust gas from the hydrothermal carbonization device is introduced into the exhaust gas treatment device for air intake and exhaust gas treatment; (10) The waste liquid generated by the material particle preparation device enters the oil-water separation device for oil-water separation, and the waste liquid enters the waste liquid post-treatment device for further post-treatment.

6. The processing method according to claim 5, characterized in that: In step (3), the dried granular material can not only be used as a raw material for carbon production in the wet garbage treatment system, but also can be taken out and used as breeding material for breeding black soldier flies.

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