Energy-saving treatment system for kitchen waste

Abstract

The utility model provides an energy-saving treatment system for kitchen waste. The energy-saving treatment system comprises a feeding unit, a multi-stage separation unit, an anaerobic fermentation unit, a biogas recovery and energy utilization unit, a sewage treatment unit, a tail gas treatment unit and a control and monitoring unit. Kitchen waste is subjected to primary treatment through the feeding unit and then enters the multi-stage separation unit to be subjected to solid-liquid, oil-water and gas separation, the solid part enters the anaerobic fermentation unit to be fermented, generated biogas is used for power generation or heat supply through the biogas recovery unit, and the waste heat recovery system is used for heating a fermentation tank. The separated sewage is discharged or recycled after being treated by the sewage treatment unit and reaching the standard, and tail gas generated in the fermentation and sewage treatment process is purified by the tail gas treatment unit. The system realizes automatic operation through the intelligent control and monitoring unit, ensures that the system is efficient and energy-saving, reduces environmental pollution, and has remarkable resource utilization and energy-saving effects.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage disposal, in particular to an energy-saving kitchen garbage disposal system. Background Art

[0002] With the acceleration of urbanization and population growth, the amount of food waste generated is rapidly increasing. Efficient food waste disposal has become a major environmental issue facing the world. Traditional food waste disposal methods include landfill and incineration, but these methods often result in high energy consumption, resource waste, and environmental pollution.

[0003] While landfilling is a relatively simple method, it occupies a significant amount of land resources, and the harmful gases and leachate produced during the decomposition process can cause long-term pollution to the atmosphere, water bodies, and soil. Furthermore, food waste contains a large amount of organic matter and water. Direct incineration is not only extremely energy-intensive but also produces harmful gases such as sulfur dioxide and nitrogen oxides, which seriously affect air quality. Furthermore, food waste is high in oil and fat, and traditional treatment methods often fail to effectively recover these resources, resulting in a significant waste of renewable resources.

[0004] While some existing treatment solutions utilize biological methods such as anaerobic fermentation, these solutions suffer from imperfect separation technology, low energy recovery efficiency, and incomplete tail gas and wastewater treatment, resulting in high operating costs, low treatment efficiency, and high energy consumption. These factors make it difficult to meet current environmental protection requirements and resource utilization needs. Therefore, there is an urgent need for an efficient, energy-saving, and environmentally friendly food waste treatment system that can achieve harmless, resource-efficient, and energy-efficient food waste treatment while reducing secondary environmental pollution.

[0005] In view of this, the inventor specially designed an energy-saving food waste treatment system, which resulted in this case. Utility Model Content

[0006] (1) Technical problems solved

[0007] The purpose of this application is to provide an energy-saving restaurant kitchen waste treatment system, which at least solves the problems of high energy consumption, insufficient resource utilization and environmental pollution in the traditional restaurant kitchen waste treatment process.

[0008] (2) Technical solution

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] The present application provides an energy-saving system for processing kitchen waste, which is characterized by comprising:

[0011] Feeding unit, used for receiving and preliminarily processing food waste;

[0012] A multi-stage separation unit, connected to the feeding unit, for separating solids, liquids, gases and grease from the food waste;

[0013] an anaerobic fermentation unit connected to the solid outlet of the multi-stage separation unit and configured to perform anaerobic fermentation on the solid components to produce renewable gas;

[0014] a biogas recovery and energy utilization unit connected to the fermentation unit, for recovering renewable biogas generated during the fermentation process and using it for power generation or heat supply;

[0015] A sewage treatment unit connected to the liquid outlet of the multi-stage separation unit is used to treat the separated sewage to meet the discharge standards or for reuse;

[0016] The tail gas treatment unit is connected to the fermentation unit and the wastewater treatment unit and is used to purify the tail gas generated during the fermentation and sewage treatment processes.

[0017] In a further embodiment, the feeding unit includes a feeding platform for receiving and temporarily storing food waste, the food waste on the feeding platform is transported by a spiral conveying device, and a crushing device for crushing large pieces of food waste is provided at the end of the spiral conveying device, and a mixing device for mixing the food waste with water and chemical reagents is provided on the crushing device.

[0018] In a further embodiment, the multi-stage separation unit includes a solid-liquid separation device, a gas-liquid separation device, an oil-water separation device, and a grease collection tank;

[0019] The mixing device is connected to the solid-liquid separation device to perform preliminary solid-liquid separation on the food waste; the gas-liquid separation device is connected to the solid-liquid separation device to separate the gas and liquid generated during the food waste treatment process; the oil-water separation device is connected to the gas-liquid separation device to separate the grease and water in the food waste; after the oil-water separation, the separated grease is transported to the grease collection tank through a pipeline, and the remaining sewage flows into the sewage treatment unit through a pipeline for treatment.

[0020] In a further embodiment, the anaerobic fermentation unit includes a fermentation tank, a heating device and a stirring system;

[0021] Solid waste enters the fermentation tank through the solid-liquid separation device. The fermentation tank is kept at a fermentation temperature by the heating device. The stirring system is used to fully mix and stir the waste with anaerobic microorganisms.

[0022] In a further embodiment, the sewage treatment unit includes a primary sedimentation tank, an aerobic biological reaction tank and an advanced treatment tank;

[0023] The sewage discharged from the oil-water separation device enters the primary sedimentation tank through a pipeline to remove large suspended solids. The precipitated sewage flows into the aerobic biological reaction tank for organic matter degradation. The treated sewage enters the deep treatment tank.

[0024] In a further embodiment, the biogas recovery and energy utilization unit includes a biogas collection system, a biogas storage tank, a biogas power generation device and a waste heat utilization unit;

[0025] The biogas in the fermentation tank enters the biogas collection system through a pipeline and is stored in the biogas storage tank; the biogas in the fermentation tank enters the biogas power generation device through a pipeline, and the waste heat generated by the biogas power generation device enters the waste heat utilization unit through a pipeline, and the waste heat is used to heat the fermentation tank or other parts that require thermal energy.

[0026] In a further embodiment, the tail gas treatment unit includes a desulfurization device, a denitrification device and a deodorization device;

[0027] The desulfurization device is connected to the gas-liquid separation device and the fermentation tank, and is used to remove sulfides in the fermentation process; the denitrification device is connected to the desulfurization device, and is used to remove nitrogen oxides in the gas; the desulfurization device and the denitrification device are respectively connected to the deodorization device, and are used to remove odor in the gas.

[0028] In a further embodiment, a control and monitoring unit is also included for monitoring and adjusting the operating status of each unit.

[0029] (3) Beneficial effects

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. Efficient resource utilization: The system uses multi-stage separation technology to effectively separate the solid, liquid, gas, grease and other components in food waste. The solids are anaerobic fermented to produce biogas, the liquids are treated as sewage and discharged or reused to meet the standards, and the grease can be recycled, thus realizing the resource utilization of waste to the greatest extent.

[0032] 2. Significant energy saving: The system integrates biogas recovery and power generation equipment, uses biogas generated by anaerobic fermentation to generate electricity, and recycles waste heat from the power generation process through the waste heat recovery device to provide energy for the system, significantly reducing the system's energy consumption and realizing energy recycling.

[0033] 3. Outstanding environmental benefits: The system adopts sewage treatment units and tail gas treatment units, and purifies sewage and tail gas through physical, chemical and biological treatment technologies to ensure that the discharged water and gas meet environmental protection standards, effectively reducing environmental pollution and protecting water sources and air quality.

[0034] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In the attached figure:

[0036] Figure 1 It is a flowchart of the overall system of the utility model.

[0037] Description of the numbers in the figure:

[0038] 1. Feeding unit; 11. Feeding platform; 12. Screw conveying device; 13. Crushing device; 14. Mixing device;

[0039] 2. Multi-stage separation unit; 21. Solid-liquid separation device; 22. Gas-liquid separation device; 23. Oil-water separation device; 24. Grease collection tank;

[0040] 3. Anaerobic fermentation unit; 31. Fermentation tank; 32. Heating device; 33. Stirring system;

[0041] 4. Sewage treatment unit; 41. Primary sedimentation tank; 42. Aerobic biological reactor; 43. Deep treatment tank;

[0042] 5. Biogas recovery and energy utilization unit; 51. Biogas power generation device; 52. Biogas collection system; 53. Biogas storage tank; 54. Waste heat utilization unit;

[0043] 6. Tail gas treatment unit; 61. Desulfurization device; 62. Denitrification device; 63. Deodorization device;

[0044] 7. Control and monitoring unit. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0046] like Figure 1 As shown, the present invention provides an energy-saving restaurant waste treatment system designed to address the problems of high energy consumption, low resource utilization, and environmental pollution associated with restaurant waste treatment. The system comprises a feeding unit 1, a multi-stage separation unit 2, an anaerobic fermentation unit 3, a biogas recovery and energy utilization unit 5, a sewage treatment unit 4, an exhaust gas treatment unit 6, and a control and monitoring unit 7. Each unit is interconnected via pipelines and a control system to ensure efficient waste treatment and resource recovery.

[0047] First, food waste enters the system through a feed unit 1. This unit 1 includes a feed platform 11 for receiving and temporarily storing food waste. From this platform, the food waste enters a spiral conveyor 12 for transport. During transport, the food waste is directed by the spiral conveyor 12 into a crushing device 13, which crushes large pieces of food waste into small particles for subsequent processing. The crushed food waste is then mixed with an appropriate amount of water and chemical reagents by a mixing device 14 to improve the physical and chemical properties of the waste, making it more suitable for subsequent separation and processing.

[0048] Next, the pre-treated food waste enters the multi-stage separation unit 2. This multi-stage separation unit 2 includes a solid-liquid separation device 21, a gas-liquid separation device 22, an oil-water separation device 23, and a grease collection tank 24. First, the food waste undergoes preliminary solid-liquid separation in the solid-liquid separation device 21. The solid waste is separated and transported to the anaerobic fermentation unit 3, while the separated liquid and gas are sent to the gas-liquid separation device 22 for further treatment. During the gas-liquid separation process, the gas and liquid are separated, with the gas flowing to the exhaust gas treatment unit 6, while the separated liquid enters the oil-water separation device 23 for oil-water separation. The grease is transported via a pipeline to the grease collection tank 24 for storage, and the separated wastewater is transported via a pipeline to the wastewater treatment unit 4 for further treatment.

[0049] After the solid waste is separated, it is sent to the anaerobic fermentation unit 3 for anaerobic fermentation. The anaerobic fermentation unit 3 comprises a fermentation tank 31, a heating device 32, and a stirring system 33. Within the fermentation tank 31, the solid waste is degraded by anaerobic microorganisms, producing renewable biogas. The heating device 32 is used to maintain the temperature within the fermentation tank 31 within a suitable range to ensure the stability and efficiency of the fermentation process. The stirring system 33 ensures sufficient mixing of the waste and anaerobic microorganisms through regular stirring, thereby improving fermentation efficiency.

[0050] The generated biogas enters the biogas recovery and energy utilization unit 5 through a pipeline. This unit includes a biogas collection system 52, a biogas storage tank 53, a biogas power generation device 51, and a waste heat utilization unit 54. The biogas is collected and stored in the biogas storage tank 53 and then transported via a pipeline to the biogas power generation device 51 for power generation. The waste heat generated during the power generation process is recovered by the waste heat utilization unit 54 and used to heat the fermentation tank 31 or other components requiring heat energy, further improving the system's energy efficiency.

[0051] At the same time, the separated sewage enters the sewage treatment unit 4 through a pipeline for treatment. The sewage treatment unit 4 includes a primary sedimentation tank 41, an aerobic biological reactor 42, and an advanced treatment tank 43. First, the sewage enters the primary sedimentation tank 41, which is used to remove large suspended particles in the sewage. Subsequently, the settled sewage flows into the aerobic biological reactor 42, where microorganisms such as activated sludge decompose the organic matter in the sewage. Finally, the treated sewage enters the advanced treatment tank 43 for further purification to ensure that the discharged water meets environmental protection standards or can be reused for system cleaning and maintenance.

[0052] The tail gas generated during the fermentation and sewage treatment processes enters the tail gas treatment unit 6, which includes a desulfurization unit 61, a denitrification unit 62, and a deodorization unit 63. The tail gas passes through the desulfurization unit 61 to remove sulfides, then passes through the denitrification unit 62 to remove nitrogen oxides, and finally passes through the deodorization unit 63 to remove odors from the tail gas, ensuring that the discharged tail gas meets environmental standards.

[0053] To ensure automated and efficient system operation, the food waste disposal system is also equipped with a control and monitoring unit 7. This control unit comprises a central control system, a data acquisition module, an alarm system, and sensors installed in each unit. The central control system uses sensors in each unit to monitor system operating parameters, including temperature, pressure, and flow, in real time. The data acquisition module processes and analyzes this data. If any system operating anomalies occur, the alarm system will sound an alarm, alerting operators to perform inspections and maintenance, ensuring continued efficient system operation.

[0054] To sum up, through the overall design of the system, efficient collaborative work is achieved between the units, which can not only efficiently process food waste, but also reduce energy consumption and environmental pollution through resource recycling and energy reuse, with significant energy-saving and environmental protection effects.

[0055] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. The energy-saving kitchen waste treatment system is characterized by: include: Feeding unit, used for receiving and preliminarily processing food waste; A multi-stage separation unit, connected to the feeding unit, for separating solids, liquids, gases and grease from the food waste; an anaerobic fermentation unit connected to the solid outlet of the multi-stage separation unit and configured to perform anaerobic fermentation on the solid components to produce renewable gas; a biogas recovery and energy utilization unit connected to the fermentation unit, for recovering renewable biogas generated during the fermentation process and using it for power generation or heat supply; A sewage treatment unit connected to the liquid outlet of the multi-stage separation unit is used to treat the separated sewage to meet the discharge standards or for reuse; The tail gas treatment unit is connected to the fermentation unit and the wastewater treatment unit and is used to purify the tail gas generated during the fermentation and sewage treatment processes.

2. The energy-saving kitchen waste treatment system according to claim 1, characterized in that: The feeding unit includes a feeding platform for receiving and temporarily storing food waste. The food waste on the feeding platform is transported by a spiral conveying device. A crushing device for crushing large pieces of food waste is provided at the end of the spiral conveying device. A mixing device for mixing the food waste with water and chemical reagents is provided on the crushing device.

3. The energy-saving kitchen waste treatment system according to claim 2, characterized in that: The multi-stage separation unit includes a solid-liquid separation device, a gas-liquid separation device, an oil-water separation device and a grease collection tank; The mixing device is connected to the solid-liquid separation device to perform preliminary solid-liquid separation on the kitchen waste; The gas-liquid separation device is connected to the solid-liquid separation device and is used to separate the gas and liquid generated during the treatment of food waste; the oil-water separation device is connected to the gas-liquid separation device and is used to separate the grease and water in the food waste; after the oil-water separation, the separated grease is transported to the grease collection tank through a pipeline, and the remaining sewage flows into the sewage treatment unit through a pipeline for treatment.

4. The energy-saving kitchen waste treatment system according to claim 3, characterized in that: The anaerobic fermentation unit includes a fermentation tank, a heating device and a stirring system; Solid waste enters the fermentation tank through the solid-liquid separation device. The fermentation tank is kept at a fermentation temperature by the heating device. The stirring system is used to fully mix and stir the waste with anaerobic microorganisms.

5. The energy-saving kitchen waste treatment system according to claim 3, characterized in that: The sewage treatment unit includes a primary sedimentation tank, an aerobic biological reaction tank and a deep treatment tank; The sewage discharged from the oil-water separation device enters the primary sedimentation tank through a pipeline to remove large suspended solids. The precipitated sewage flows into the aerobic biological reaction tank for organic matter degradation. The treated sewage enters the deep treatment tank.

6. The energy-saving kitchen waste treatment system according to claim 4, characterized in that: The biogas recovery and energy utilization unit includes a biogas collection system, a biogas storage tank, a biogas power generation device and a waste heat utilization unit; The biogas in the fermentation tank enters the biogas collection system through a pipeline and is stored in the biogas storage tank; the biogas in the fermentation tank enters the biogas power generation device through a pipeline, and the waste heat generated by the biogas power generation device enters the waste heat utilization unit through a pipeline, and the waste heat is used to heat the fermentation tank or other parts that require thermal energy.

7. The energy-saving kitchen waste treatment system according to claim 4, characterized in that: The tail gas treatment unit includes a desulfurization device, a denitrification device and a deodorization device; The desulfurization device is connected to the gas-liquid separation device and the fermentation tank, and is used to remove sulfides during the fermentation process; The denitrification device is connected to the desulfurization device for removing nitrogen oxides in the gas; the desulfurization device and the denitrification device are respectively connected to the deodorization device for removing odor in the gas.

8. The energy-saving kitchen waste treatment system according to claim 1, characterized in that: It also includes a control and monitoring unit for monitoring and adjusting the operating status of each unit.

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