Garbage disposal method and system

Abstract

The present invention discloses a garbage treatment method and treatment system, the method comprising: performing dry-wet separation on garbage; the solid part separated after the dry-wet separation is treated by hydrothermal method to obtain hydrothermal carbide; the liquid part separated after the dry-wet separation is discharged after purification treatment; the odor generated during the dry-wet separation is introduced into a boiler system for incineration and then discharged, and the boiler system can provide steam for the hydrothermal treatment. The present invention separates the garbage into dry and wet parts and then treats them. The dry garbage can be used as fertilizer after hydrothermal treatment, and the liquid garbage is purified and then discharged. The odor generated during the treatment is discharged after incineration by a boiler, so that the garbage can be treated efficiently.

Description

Technical Field

[0001] The invention belongs to the technical field of organic waste treatment, and in particular relates to a garbage treatment method and a treatment system. Background Art

[0002] Due to the large amount of domestic waste discharged, its complex and diverse composition, and its pollution, resource and social nature, it needs to be harmlessly, resourcefully, reduced and socially treated. If it is not properly treated, it will pollute the environment, affect environmental hygiene, waste resources, damage production and living safety, and destroy social harmony. Garbage disposal is to quickly remove the garbage, treat it harmlessly, and finally make rational use of it.

[0003] Especially for food waste, the harmful substances in it will flow out and return to the human body through other channels and food chains, which may easily cause food safety risks. Secondly, food waste is easy to rot, ferment, and stink, which may cause environmental pollution, such as directly polluting the air, soil, and water. Therefore, if food waste is not handled, it will only make environmental pollution worse and finally affect the image of the city. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a garbage treatment method, which separates the dry and wet garbage and then processes them. The dry garbage can be used as fertilizer after hydrothermal treatment, and the liquid garbage is purified before discharge. The odor generated during the treatment is discharged after incineration in a boiler, so that the garbage can be treated efficiently.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is as follows:

[0006] A method for treating garbage, comprising:

[0007] Separate wet and dry garbage;

[0008] The solid part separated after the dry-wet separation is treated by a hydrothermal method to obtain a hydrothermal carbide;

[0009] The liquid portion separated after the dry-wet separation is discharged after purification;

[0010] The odor generated during the dry-wet separation is introduced into the boiler system and then incinerated and discharged, and the boiler system can provide steam for the hydrothermal treatment.

[0011] Furthermore, the garbage is kitchen waste, and the liquid part is first separated into oil and water before the purification process, and the wastewater after the oil and water separation is used to produce biogas through anaerobic fermentation.

[0012] Furthermore, the biogas is connected to the boiler system as boiler fuel.

[0013] Furthermore, the step of crushing the garbage is also included before the dry-wet separation.

[0014] Furthermore, the garbage crushing step also includes:

[0015] Waste sorting to separate metal, glass and / or porcelain.

[0016] Furthermore, the garbage sorting, the garbage crushing and the dry-wet separation steps are all carried out in a closed space.

[0017] Furthermore, wood chips and / or crushed straw are added during the hydrothermal treatment.

[0018] Furthermore, the fuel of the boiler system is biomass fuel, and the biomass fuel is used to obtain combustible gas through dry distillation.

[0019] Furthermore, the solid matter remaining after the biomass fuel is subjected to dry distillation is added to the hydrothermal carbonized material, mixed and then dried by a drying device.

[0020] In order to solve the above technical problems, the present invention also provides a garbage disposal system, comprising a crusher and a dry-wet separation device connected to the crusher, wherein the garbage crushed by the crusher is sent to the dry-wet separation device for dry-wet separation to obtain solid garbage and liquid garbage;

[0021] The crusher and the dry-wet separation device are both arranged in a closed space, and the odor generated when the garbage is processed is collected through the closed space, and the output end of the odor is connected to the boiler equipment;

[0022] It also includes an anaerobic fermentation device connected to the dry-wet separation device, and the wastewater in the liquid garbage is discharged into the anaerobic fermentation device for fermentation to produce biogas;

[0023] It also includes a hydrothermal reaction device, the input end of which is connected to the dry-wet separation device, so that the solid waste is hydrothermally carbonized by the hydrothermal reaction device to obtain hydrothermal carbonized products, and the output end of the hydrothermal reaction device is connected to a drying device;

[0024] The boiler equipment is a biomass boiler, and the solid matter remaining after the dry distillation of the biomass fuel of the boiler equipment is transported to the drying device and mixed with the hydrothermal carbonized material for drying.

[0025] Furthermore, it also includes an oil-water separation device, the input end of the oil-water separation device is connected to the dry-wet separation device, and the output end of the oil-water separation device is connected to the anaerobic fermentation device.

[0026] Furthermore, it also includes packaging equipment, and the solid matter is mixed with the hydrothermal carbide and dried and then packaged through the packaging equipment.

[0027] Furthermore, it also includes a sorting device, which is located in the enclosed space, and the garbage enters from the input end of the sorting device, and the output end of the sorting device is connected to the crusher.

[0028] Beneficial effects of the present invention:

[0029] The garbage treatment method of the present invention separates the garbage into dry and wet parts and then treats them. The dry garbage can be used as fertilizer after hydrothermal treatment, and the liquid garbage is purified before being discharged. The odor generated during the treatment is discharged after being incinerated in a boiler, so that the garbage can be treated efficiently.

[0030] The liquid part of the food waste is separated from oil and water before purification. The wastewater after oil and water separation is used to produce biogas through anaerobic fermentation, and the biogas is connected to the boiler system as boiler fuel, which can also reduce the cost of waste disposal.

[0031] Adding sawdust and / or crushed straw during the hydrothermal treatment can dilute the salt content in the garbage and further remove part of the water.

[0032] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the structure of the garbage disposal system in Example 1;

[0034] Figure 2 is a schematic diagram of the structure of the garbage disposal system in Example 2;

[0035] The parts in the accompanying drawings are marked as follows:

[0036] Crusher 1, dry-wet separation device 2, negative pressure conveying line 3, boiler equipment 4, anaerobic fermentation device 5, hydrothermal reaction device 6, drying device 7, packaging equipment 8, sorting device 9, oil-water separation equipment 10 and sewage purification device 11. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention. Example

[0038] A method for treating garbage comprises the following steps:

[0039] The garbage is introduced into the dry-wet separator to separate the solid part and the liquid part;

[0040] The separated liquid portion is discharged without pollution after purification;

[0041] The separated solid part is metered by a metering device and then added to a hydrothermal high-pressure treatment device. At the same time, a certain amount of crushed straw or sawdust (leaves, flower and tree pruning waste, etc.) is metered out and added to the hydrothermal high-pressure treatment device;

[0042] Close the hydrothermal high pressure treatment equipment and perform hydrolysis;

[0043] The hydrothermal carbide obtained after being treated by the hydrothermal high-pressure treatment equipment is transported to a spiral dryer in a closed manner for drying;

[0044] The dried hydrothermal carbonized product (which can be used as organic fertilizer) is packaged by a packaging machine and stored.

[0045] The straw or sawdust added during the hydrothermal treatment can dilute the salt in the garbage and further remove moisture. The weight of the added straw or sawdust is 0%-1% of the weight of the hydrothermal carbonized product.

[0046] In this embodiment, the hydrothermal high-pressure treatment equipment adjusts the temperature of the reactor to 150-200° C., controls the pressure to 1.5-2.2 MPa, and the reaction time to 20-40 min.

[0047] The method also includes a boiler system for providing steam to the hydrothermal high pressure treatment equipment.

[0048] In this embodiment, the material flow between all steps is closed and conveyed under negative pressure, and the collected odor can be introduced into the boiler system for incineration, and the odor after incineration can meet the emission standards.

[0049] In addition, the fuel of the boiler system is biomass fuel, and the biomass fuel dry distillation method is adopted to collect and generate combustible gas to provide steam to the hydrothermal high-pressure treatment equipment;

[0050] After the boiler system adopts the biomass fuel dry distillation method, 10% of the solid residue is left, which is added to the carbide (organic fertilizer) obtained after the hydrothermal reaction. Specifically, it is transported to the spiral dryer, mixed with the carbide, and dried by the dryer.

[0051] The liquid part (sewage) separated from the dry and wet parts is discharged into the anaerobic fermentation device for fermentation. The generated biogas can be used by other equipment or directly used as fuel for the boiler system;

[0052] The wastewater generated after fermentation by the anaerobic fermentation device is subjected to aerobic treatment, biochar filtration and ozone oxidation disinfection before being discharged in compliance with the discharge standards.

[0053] This embodiment also provides a garbage disposal system, including a crusher 1 and a dry-wet separation device 2, wherein the crusher is connected to the dry-wet separation device via a negative pressure conveying line 3, and the garbage crushed by the crusher is sent to the dry-wet separation device for dry-wet separation to obtain solid garbage and liquid garbage;

[0054] The negative pressure conveying line is connected to the boiler equipment 4;

[0055] It also includes an anaerobic fermentation device 5 connected to the dry-wet separation device, and the sewage in the liquid garbage is discharged into the anaerobic fermentation device for fermentation to produce biogas;

[0056] In this embodiment, the biogas is connected to the boiler equipment to provide fuel to the boiler equipment.

[0057] It also includes a hydrothermal reaction device 6, the input end of which is connected to the dry-wet separation device, so that the solid waste is hydrothermally carbonized by the hydrothermal reaction device to obtain hydrothermal carbonized products, and the output end of the hydrothermal reaction device is connected to a drying device 7;

[0058] It also includes a sewage purification device 11, which is connected to the anaerobic fermentation device 5. Wastewater generated after fermentation by the anaerobic fermentation device is purified by the sewage purification device and then discharged.

[0059] The boiler equipment 4 is a biomass boiler. The solid matter remaining after the dry distillation of the biomass fuel of the boiler equipment is transported to the drying device and mixed with the hydrothermal carbonized material for drying.

[0060] The invention also comprises a packaging device 8, through which the solid matter is mixed and dried with the hydrothermal carbide and then packaged. Example

[0061] The difference between this embodiment and embodiment 1 is that the garbage is kitchen waste, so the treatment method of the present invention further includes the steps of garbage sorting and / or crushing the garbage before dry-wet separation, and the step of separating the oil and water in the liquid part after dry-wet separation;

[0062] The garbage sorting step can screen out metals, glass and / or porcelain that cannot be hydrothermally treated in the garbage. The screened garbage is crushed and then separated into dry and wet parts.

[0063] In order to prevent the odor from the garbage from spreading into the air, the material flow between the garbage sorting, the garbage crushing and the dry-wet separation steps is all carried out under negative pressure in a closed space.

[0064] The oil-water separation step is used to separate the oil and wastewater in the liquid part, the oil is recycled, and the wastewater is also discharged into the anaerobic fermentation device to produce biogas.

[0065] Correspondingly, the garbage disposal system is also equipped with a sorting device 9 for food waste. The sorting device is connected to the input end of the crusher through the negative pressure conveying line 3. The garbage enters from the input end of the sorting device, and the output end of the sorting device is connected to the crusher.

[0066] And it comprises an oil-water separation device 10, the input end of the oil-water separation device is connected to the dry-wet separation device, and the output end of the oil-water separation device is connected to the anaerobic fermentation device.

[0067] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A garbage disposal system, characterized in that: It includes a crusher and a dry-wet separation device, wherein the crusher is connected to the dry-wet separation device through a negative pressure conveying line, and the garbage crushed by the crusher is sent to the dry-wet separation device for dry-wet separation to obtain solid garbage and liquid garbage; The negative pressure conveying line is connected to the boiler equipment; It also includes an anaerobic fermentation device connected to the dry-wet separation device, and the wastewater in the liquid garbage is discharged into the anaerobic fermentation device for fermentation to produce biogas; It also includes a hydrothermal reaction device, the input end of which is connected to the dry-wet separation device, so that the solid waste is hydrothermally carbonized by the hydrothermal reaction device to obtain hydrothermal carbonized products, and the output end of the hydrothermal reaction device is connected to a drying device; The boiler equipment is a biomass boiler, and the solid matter remaining after the dry distillation of the biomass fuel of the boiler equipment is transported to the drying device and mixed with the hydrothermal carbonized material for drying; It also includes an oil-water separation device, the input end of which is connected to the dry-wet separation device, and the output end of which is connected to the anaerobic fermentation device; It also includes a sorting device, which is connected to the input end of the crusher through the negative pressure conveying line. The garbage enters from the input end of the sorting device, and the output end of the sorting device is connected to the crusher.

2. The garbage disposal system according to claim 1, characterized in that: The invention also comprises a packaging device, wherein the solid matter is mixed with the hydrothermal carbide and dried and then packaged through the packaging device.

3. A garbage disposal method, applied to the garbage disposal system according to claim 1 or 2, characterized in that: include: Separate wet and dry garbage; The solid part separated after the dry-wet separation is treated by a hydrothermal method to obtain a hydrothermal carbide; The liquid portion separated after the dry-wet separation is discharged after purification; The odor generated during the dry-wet separation is introduced into the boiler system and then incinerated and discharged, and the boiler system can provide steam for the hydrothermal treatment.

4. A garbage disposal method according to claim 3, characterized in that: The garbage is kitchen waste, and the liquid part is first separated from oil and water before the purification process, and the wastewater after the oil and water separation is used to produce biogas through anaerobic fermentation.

5. A garbage disposal method according to claim 4, characterized in that: The biogas is connected to the boiler system as boiler fuel.

6. A garbage disposal method according to claim 3, characterized in that: The method also includes a step of crushing the garbage before the dry-wet separation.

7. A garbage disposal method according to claim 6, characterized in that: The garbage crushing step also includes: Waste sorting to separate metal, glass and / or porcelain.

8. A garbage disposal method according to claim 7, characterized in that: The material flow between the garbage sorting, the garbage crushing and the dry-wet separation steps is all carried out under negative pressure in a closed space.

9. A garbage disposal method according to claim 3, characterized in that: Wood chips and / or crushed straw are added during the hydrothermal treatment.

10. A garbage disposal method according to claim 3, characterized in that: The fuel of the boiler system is biomass fuel, and the biomass fuel is used to obtain combustible gas through dry distillation.

11. A garbage disposal method according to claim 10, characterized in that: The solid residue remaining after the biomass fuel is subjected to dry distillation is added to the hydrothermal carbonized material, and the two are mixed and then dried by a drying device.

12. A garbage disposal method according to claim 3, characterized in that: The reaction temperature during the hydrothermal treatment is 150-200° C., the reaction pressure is 1.5-2.2 MPa, and the reaction time is 20-40 min.

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