Cooperative processing system and method for multi-source solid waste

Abstract

The invention relates to the technical field of environmental governance and resource recycling, in particular to a multi-source solid waste cooperative treatment system and method. The multi-source solid waste cooperative treatment system comprises a household garbage treatment system, a building garbage treatment system, an industrial solid waste treatment system and a cooperative treatment system. The household garbage treatment system, the construction garbage treatment system and the industrial solid waste treatment system are each provided with a waste classifying and sorting unit, all kinds of waste are reasonably classified and pretreated, and then the waste is subjected to cooperative treatment through the cooperative treatment system. Finally, a waste recycling system which is comprehensive in coverage, efficient in operation, standard and orderly is established, the value of various waste resources can be fully excavated, and the industrial scale and quality of resource recycling can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental management and resource recycling, and in particular to a system and method for collaboratively processing multi-source solid waste. Background Art

[0002] With the improvement of people's living standards and the rapid development of urbanization, the amount of solid waste generated has been increasing year by year. Such a huge amount of solid waste, if not properly handled and reasonably utilized, will cause serious pollution and harm to the environment and people's health, and will also cause a huge waste of resources. Therefore, it is of great significance to classify and recycle solid waste, reduce the amount of solid waste generated and increase the amount of resource utilization, and limit the entry of resource-recyclable solid waste into landfill and incineration.

[0003] From the perspective of sources, solid waste can be divided into domestic waste, construction waste, sewage sludge, renewable resources, agricultural waste and industrial solid waste. Among them, domestic waste, construction waste and industrial solid waste account for more than half of my country's annual solid waste output, but their resource utilization rate is low. The comprehensive utilization rate of industrial solid waste is about 60%, and the resource utilization rate of construction waste is even lower.

[0004] According to the relevant requirements of the Opinions on Accelerating the Construction of a Waste Recycling System, we should promote the fine management and effective recycling of waste, improve the level of waste resource utilization and reuse, and promote the rapid development of the resource recycling industry. Therefore, it is an important measure to accelerate the green transformation of development mode to centrally treat various types of waste, build a recycling system of "resources-waste-renewable resources", fully improve the comprehensive utilization rate of resources, and realize the coordinated utilization and recycling of various types of solid waste as soon as possible. Summary of the invention

[0005] Based on this, the present invention provides a multi-source solid waste collaborative treatment system and method, which can safely and efficiently treat urban solid waste, maximize the resource utilization of urban solid waste, and meet people's living requirements for a comfortable and healthy environment.

[0006] The present invention achieves the above technical objectives through the following technical solutions:

[0007] The present invention provides a multi-source solid waste collaborative processing system, including a domestic waste processing system, a construction waste processing system, an industrial solid waste processing system and a collaborative processing system;

[0008] The domestic waste treatment system includes a waste sorting unit and a domestic waste resource utilization unit. The waste sorting unit includes at least a waste fine sorting device, and the waste fine sorting device is provided with at least a waste metal outlet, a waste glass outlet, a waste bamboo and wood outlet, a waste fabric outlet, a waste plastic outlet and an organic waste outlet; the domestic waste resource utilization unit includes at least an organic waste biological drying device connected to the organic waste outlet;

[0009] The construction waste treatment system includes a construction waste classification and sorting unit and a construction waste resource utilization unit. The construction waste classification and sorting unit at least includes a construction waste classification and sorting device. The construction waste classification and sorting device is at least provided with a waste metal outlet, a waste glass outlet, a waste wood outlet, and a brick, stone and concrete outlet. The construction waste resource utilization unit at least includes a backfill material storage tank and an aggregate processing device connected to the brick, stone and concrete outlet. The aggregate processing device at least includes an aggregate crushing component, an aggregate screening component, a coarse aggregate storage tank, a fine aggregate storage tank and a powdered aggregate storage tank, a mortar production line connected to the fine aggregate storage tank, a block production line connected to one or more of the coarse aggregate storage tank, the fine aggregate storage tank and the powdered aggregate storage tank, and a wallboard production line connected to the coarse aggregate storage tank and / or the fine aggregate storage tank.

[0010] The industrial solid waste treatment system includes an industrial solid waste classification unit and an industrial solid waste resource utilization unit. The industrial solid waste classification unit includes at least an industrial by-product gypsum storage reservoir, a fly ash storage reservoir, a smelting slag storage reservoir, a slag storage reservoir, a tailings storage reservoir and a coal gangue storage reservoir; the industrial solid waste resource utilization unit includes at least a fly ash sorting device connected to the fly ash storage reservoir and a metal extraction device connected to the smelting slag storage reservoir, and the fly ash sorting device is provided with a high-carbon fly ash outlet and a low-carbon fly ash outlet;

[0011] The coordinated processing system at least includes a recycled metal production device, a recycled glass production device, a wood recycling device, an improver preparation device, a cement preparation device, and a brick making device; the recycled metal production device is connected to at least one of the waste metal outlet of the garbage fine sorting device, the waste metal outlet of the construction waste classification and sorting device, and the metal extraction outlet of the metal extraction device; the recycled glass device is connected to at least one of the waste glass outlet of the garbage fine sorting device and the waste glass outlet of the construction waste classification and sorting device; the wood recycling device is connected to at least one of the waste bamboo and wood outlet of the garbage fine sorting device and the waste wood outlet of the construction waste classification and sorting device; the improver preparation device is connected to at least one of the bio-drying product outlet of the bio-drying device in the domestic waste resource utilization unit and the high-carbon fly ash outlet of the fly ash sorting device; the cement preparation device and the brick making device are connected to at least one of the low-carbon fly ash outlet of the fly ash sorting device of the industrial solid waste resource utilization unit, the slag storage, the tailings storage, the coal gangue storage, and the powdered aggregate storage of the construction waste resource utilization unit.

[0012] According to the multi-source solid waste coordinated treatment system described above, the domestic waste resource utilization unit also includes at least a waste plastic recycling device connected to the waste plastic outlet, a waste fabric recycling device connected to the waste fabric outlet, and a fertilizer production device connected to the bio-drying product outlet of the organic waste bio-drying device.

[0013] According to the multi-source solid waste coordinated treatment system described above, the construction waste resource utilization unit also includes at least a backfill material storage tank connected to the brick, stone and concrete outlets.

[0014] According to the multi-source solid waste coordinated treatment system described above, the industrial solid waste resource utilization unit also includes at least an α-type high-strength gypsum preparation device connected to the industrial by-product gypsum storage tank.

[0015] According to the multi-source solid waste coordinated treatment system described above, the outlet of the cement preparation device is connected to at least one of the mortar production line, the block production line and the wall panel production line.

[0016] According to the multi-source solid waste coordinated treatment system described above, the wood recycling device is a board manufacturing production line and / or a wood carbonization production line.

[0017] The present invention also provides a multi-source solid waste collaborative treatment method, which uses the above-mentioned multi-source solid waste collaborative treatment system for treatment, including a domestic waste treatment process, a construction waste treatment process, an industrial solid waste treatment process and a collaborative treatment process;

[0018] The domestic waste treatment process at least includes the steps of finely sorting the domestic waste to obtain waste metal, waste glass, waste bamboo and wood, waste fabric, waste plastic and organic waste, and bio-drying the organic waste to obtain bio-dried products;

[0019] The construction waste treatment process at least includes the steps of classifying and sorting the construction waste to obtain waste metal, waste glass, waste wood, bricks, stones and concrete, crushing the bricks, stones and concrete as aggregates, and screening the crushed aggregates to obtain coarse aggregates, fine aggregates and powdered aggregates, preparing mortar using the fine aggregates, preparing blocks using at least one of the coarse aggregates, fine aggregates and powdered aggregates, and preparing wallboards using the coarse aggregates and / or fine aggregates;

[0020] The industrial solid waste treatment process at least includes the steps of classifying the industrial solid waste to obtain industrial by-product gypsum, fly ash, smelting slag, slag, tailings, and coal gangue, extracting metals from the smelting slag, and sorting the fly ash into high-carbon fly ash and low-carbon fly ash;

[0021] The coordinated processing steps at least include metal recycling and manufacturing of scrap metals obtained from the domestic waste treatment process, scrap metals obtained from the construction waste treatment process, and metals extracted from the industrial solid waste treatment process; recycling glass manufacturing of waste glass obtained from the domestic waste treatment process and waste glass obtained from the construction waste treatment process; board manufacturing or carbonization treatment of waste bamboo and wood obtained from the domestic waste treatment process and waste wood obtained from the construction waste treatment process; using the bio-drying product obtained from the domestic waste treatment process and the high-carbon fly ash obtained from the industrial solid waste treatment process to prepare soil conditioners; and using the low-carbon fly ash, slag, tailings, and coal gangue obtained from the industrial solid waste treatment process to make bricks or cement.

[0022] According to the above-mentioned multi-source solid waste coordinated treatment method, the coordinated treatment process also includes the step of using the prepared cement to prepare one or more of mortar, blocks and wall panels.

[0023] According to the above-mentioned multi-source solid waste coordinated treatment method, the domestic waste treatment process also includes the steps of recycling waste fabrics and waste plastics and / or preparing fertilizers using biological drying products.

[0024] According to the above-mentioned multi-source solid waste coordinated treatment method, the industrial solid waste treatment process also includes the step of preparing α-type high-strength gypsum using industrial by-product gypsum.

[0025] The multi-source solid waste collaborative treatment system and method provided by the present invention is a waste recycling system with comprehensive coverage, efficient operation, standardized and orderly operation. The value of various types of waste resources is fully explored, the scale and quality of the resource recycling industry are significantly improved, and the level of waste recycling is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the multi-source solid waste collaborative treatment system provided by the present invention;

[0027] Figure 2 This is a schematic flow chart of the multi-source solid waste collaborative treatment method provided by the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The "domestic waste" mentioned in the present invention refers to solid waste generated in daily life or in activities that provide services for daily life, as well as solid waste that is deemed as domestic waste according to laws and administrative regulations. Domestic waste can generally be divided into four categories: kitchen waste: food waste such as leftovers, bones, vegetable roots and leaves, and fruit peels; recyclable waste: five categories of waste paper, plastic, glass, metal and cloth. For example, paper, plastic bottles, glass bottles, cans, old clothes, etc.; hazardous waste: including batteries, fluorescent tubes, light bulbs, mercury thermometers, paint buckets, some household appliances, expired medicines, expired cosmetics, etc.; other garbage: garbage other than the above categories of garbage, such as broken ceramics, toilet paper, etc.

[0030] The "construction waste" mentioned in the present invention refers to the abandoned soil and materials generated in the construction, reconstruction, expansion and demolition of various buildings, structures, pipelines and other projects, as well as various wastes discarded by residents in the process of decorating and renovating their houses. It includes construction slag: derived from the excavation of earth and stone in the construction process of various buildings (structures), pipelines, roads and bridges; construction waste: covering concrete, asphalt mixture, mortar, formwork and other wastes in the process of new construction, reconstruction (expansion); demolition waste: generated from the demolition of various buildings (structures), pipelines, roads and bridges, including concrete, mortar, bricks and tiles, ceramics, stone, metal, wood and other wastes; decoration waste: derived from the process of house decoration and renovation, covering concrete, mortar, bricks and tiles, ceramics, stone, gypsum, aerated concrete blocks, metal, wood, glass and plastic and other wastes.

[0031] The "industrial solid waste" mentioned in the present invention refers to solid, semi-solid and gaseous articles and materials placed in containers that have lost their original use value or have not lost their use value but have been abandoned or discarded in industrial production activities, as well as articles and materials that are included in the solid waste management stipulated by laws and administrative regulations. According to the industry source, it is divided into the following categories: metallurgical industry solid waste: such as blast furnace slag, steel slag, non-ferrous metal slag, etc.; mining industry solid waste: such as mine stripping waste rock, excavation waste rock, coal gangue, ore dressing waste rock, etc.; fuel industry solid waste: such as coal slag, flue ash, coal powder slag, etc. Solid waste from the chemical industry: such as sulfuric acid slag, carbide slag, alkali slag, gas furnace slag, phosphorus slag, mercury slag, chromium slag, etc.; solid waste from the radioactive industry: such as solid radioactive waste slag generated during nuclear fuel mining, preparation and post-irradiation fuel recovery; solid waste from the power industry: such as slag, fly ash, smoke, etc.; other industrial solid waste: such as glass waste slag, ceramic waste slag, papermaking waste slag, construction waste, transportation machinery waste, textile and garment industry waste, pharmaceutical industry waste, food processing industry waste, etc.

[0032] The "biological drying treatment" mentioned in the present invention refers to the separation, evaporation or removal of water in garbage materials through the action of bacteria or high temperature.

[0033] As used herein, the term "waste" is used interchangeably with "refuse" and "garbage".

[0034] The term "automatic sorting device" in the present invention is also called "intelligent sorting device", which refers to a device that realizes sorting through a non-manual, automatic control device.

[0035] The term "resource utilization" mentioned in the present invention refers to directly utilizing waste as raw materials or recycling waste. Resource utilization is an important part of circular economy.

[0036] The term "fine processing" mentioned in the present invention is also called "resource processing", which refers to the further processing of waste metal, waste plastic, waste paper, waste textile, waste wood and waste glass separately for their recycling and reuse, for example, waste plastic is used to make plastic particles, waste textile is used to make PET alloy or waste paper is used to make recycled paper, etc.

[0037] The "connection" mentioned in the present invention refers to the relationship for material or logistics transfer between devices or units, which can be a direct connection between devices or units, or an indirect connection between devices or units through a connecting device or channel, or a material or logistics transfer relationship between devices or units. For example, a connection relationship for transferring materials or logistics can be established between devices or units by transferring materials or logistics between devices or units through mobile transportation or conveying equipment or devices.

[0038] Based on the problem that the existing solid waste resource utilization is not reasonable, the present invention provides a multi-source solid waste collaborative treatment system, such as Figure 1 As shown, the multi-source solid waste collaborative treatment system includes a domestic waste treatment system, a construction waste treatment system, an industrial solid waste treatment system and a collaborative treatment system; wherein, the domestic waste treatment system, the construction waste treatment system and the industrial solid waste treatment system are all provided with waste classification and / or sorting units and resource utilization units, and the same treatment system can collaboratively treat waste from at least two of the above systems.

[0039] Specifically, the domestic waste treatment system includes a domestic waste sorting unit and a domestic waste resource utilization unit. The waste sorting unit at least includes a waste fine sorting device 101, and the waste fine sorting device 101 is at least provided with a scrap metal outlet, a scrap glass outlet, a scrap bamboo and wood outlet, a scrap fabric outlet, a scrap plastic outlet and an organic waste outlet; the domestic waste resource utilization unit at least includes an organic waste bio-drying device 104 connected to the organic waste outlet.

[0040] It is easy to understand that the purpose of the garbage sorting unit is to separate the different components in the garbage by physical, chemical or biological methods so as to carry out subsequent resource utilization or harmless treatment. This process is of great significance for improving the efficiency of garbage treatment, reducing environmental pollution and promoting resource recycling. It is a key link in garbage treatment technology. The present invention is to classify domestic garbage into several categories: waste metal, waste glass, waste bamboo and wood, waste fabric, waste plastic and organic waste.

[0041] The garbage fine sorting device 101 in the present invention is not particularly limited, and it can be any intelligent or automatic sorting device or system for garbage sorting that is commercially available or purchased, as long as it can meet the processing volume requirements. In addition, the garbage fine sorting device 101 can also be a combination of some devices with intelligent or automatic identification and classification and separation functions. For example, in some embodiments of the present invention, the garbage fine sorting device 101 is also provided with a domestic waste feeding inlet, a domestic waste type identification component and a crushing device, and the domestic waste is divided into several categories of waste metal, waste glass, waste bamboo and wood, waste fabric, waste plastic and organic waste through the domestic waste type identification component, and then crushed and drum screened respectively.

[0042] The purpose of the biological drying device is to treat organic waste. Biological drying technology, also known as biological drying, usually separates, evaporates or removes the moisture in the garbage material through the action of bacteria (microorganisms) or high temperature. The heat energy generated during the treatment process is combined with forced ventilation and other control measures to promote the evaporation of moisture in organic matter, thereby achieving low-cost and high-efficiency moisture removal.

[0043] The biological drying device 104 in the present invention is not particularly limited, and it can be a commercially available or commercially available device or system for organic waste treatment, as long as it can meet the processing capacity requirements. For example, in some specific embodiments of the present invention, the biological drying device 104 is a pyrolysis dryer. In other specific embodiments of the present invention, the biological drying device 104 is a fermentation device, which treats organic waste through the action of bacteria (microorganisms), and the biological drying product obtained after the treatment can be used as a mixed strain and mixed with part of the classified domestic waste for treatment.

[0044] The construction waste treatment system includes a construction waste classification and sorting unit and a construction waste resource utilization unit. The construction waste classification and sorting unit at least includes a construction waste classification and sorting device 201. The construction waste classification and sorting device 201 is at least provided with a scrap metal outlet, a scrap glass outlet, a scrap wood outlet, and a brick, stone, and concrete outlet; the construction waste resource utilization unit at least includes a backfill material storage tank 202 and an aggregate processing device 203 connected to the brick, stone, and concrete outlets. The aggregate processing device 203 at least includes an aggregate crushing component, an aggregate screening component, a coarse aggregate storage tank, a fine aggregate storage tank, and a powdered aggregate storage tank, a mortar production line 204 connected to the fine aggregate storage tank, a block production line 205 connected to one or more of the coarse aggregate storage tank, the fine aggregate storage tank, and the powdered aggregate storage tank, and a wall panel production line 206 connected to the coarse aggregate storage tank and / or the fine aggregate storage tank.

[0045] The purpose of the construction waste classification and sorting unit is to separate the different components in the construction waste by physical, chemical or biological methods so as to carry out subsequent resource utilization or harmless treatment. This process is also of great significance for improving the efficiency of construction waste treatment, reducing environmental pollution and promoting resource recycling. The present invention is to classify construction waste into several categories: waste metal, waste glass, waste wood, brick, stone and concrete.

[0046] The construction waste classification and sorting device 201 in the present invention is not particularly limited, and it can be any intelligent or automatic sorting device or system for construction waste sorting that is commercially available or purchased, as long as it can meet the processing volume requirements. In addition, the construction waste classification and sorting device 201 can also be a combination of some devices with intelligent or automatic identification and classification and separation functions. For example, in some embodiments of the present invention, the construction waste classification and sorting device 201 is provided with a construction waste type identification component, through which the construction waste is classified into several categories such as waste metal, waste glass, waste wood, and bricks, stones and concrete.

[0047] The purpose of the backfill storage 202 is to store backfill materials such as bricks, stones and concrete, and there is no special limitation on its structure as long as it can meet the storage requirements.

[0048] The purpose of the aggregate processing device 203 is to crush and screen bricks, stones and concrete, and its structure is not particularly limited. For example, in some specific embodiments of the present invention, the aggregate processing device 203 is a crusher and a screen that are conventionally used for crushing bricks, stones and concrete. The aggregate processing device 203 is used to divide bricks, stones and concrete into coarse aggregates, fine aggregates and powdered aggregates, which is conducive to better improving their utilization efficiency. The aggregate after screening can be used in the mortar production line 204, the block production line 205 or the wallboard production line 206 as needed.

[0049] In the present invention, there is no special restriction on the mortar production line 204, the block production line 205 or the wallboard production line 206. Mortar is made by mixing inorganic cementitious materials (such as cement, lime, clay, etc.) and fine aggregate (sand) with water in a certain proportion, also known as mortar, which is used for masonry and plastering engineering and is an indispensable bonding material in construction; blocks are man-made blocks made of concrete, industrial waste (such as slag, fly ash, etc.) or local materials; wallboards are a kind of building components that can be used to construct house structures or as interior decoration materials. The above-mentioned production line can adopt conventional production lines in this field, and the aggregates obtained after treatment can be used as raw materials as needed.

[0050] The industrial solid waste treatment system includes an industrial solid waste classification unit and an industrial solid waste resource utilization unit. The industrial solid waste classification unit includes at least an industrial by-product gypsum storage reservoir 301, a fly ash storage reservoir 302, a smelting slag storage reservoir 303, a slag storage reservoir 304, a tailings storage reservoir 305 and a coal gangue storage reservoir 306; the industrial solid waste resource utilization unit includes at least a fly ash sorting device 307 connected to the fly ash storage reservoir 302 and a metal extraction device 308 connected to the smelting slag storage reservoir 303, and the fly ash sorting device 307 is provided with a high-carbon fly ash outlet and a low-carbon fly ash outlet.

[0051] The purpose of the industrial solid waste classification unit is to classify industrial solid waste for subsequent resource utilization or harmless treatment. This process is also of great significance for improving the efficiency of industrial solid waste treatment, reducing environmental pollution, and promoting resource recycling. The present invention classifies industrial solid waste into several categories, including industrial by-product gypsum, fly ash, smelting slag, slag, tailings, and coal gangue. The specific classification method is not limited, and the classification can be carried out by automated equipment or manually.

[0052] The purpose of the above-mentioned industrial by-product gypsum storage 301, fly ash storage 302, smelting slag storage 303, slag storage 304, tailings storage 305 and coal gangue storage 306 is to temporarily store various types of industrial solid wastes. Their structures are not limited, such as factory buildings or storage pits.

[0053] Fly ash is a kind of industrial waste. It mainly exists in the exhaust gas discharged by coal-fired power plants. It is the product of the combustion of oxides such as silicon and lead. It is in a fine ash-like solid state. When preparing concrete, adding fly ash can reduce the amount of cement, reduce the amount of water, improve the anti-seepage ability of concrete, and reduce the creep of concrete. The utilization directions of fly ash are: first, to carry out chemical utilization, extract metal elements such as iron and aluminum; second, to use it as building materials, to produce cement raw materials and new building materials such as bricks, blocks, mixed materials, microspheres, sinking beads, and ceramsite; third, to use it in construction, to carry out fly ash sorting, to produce commercial concrete and commercial mortar, which are used for engineering construction such as dam construction and road construction; fourth, to carry out land reclamation and mine backfilling. In the present invention, fly ash is divided into high-carbon fly ash and low-carbon fly ash by fly ash sorting device 307. High-carbon fly ash is used as a raw material for soil conditioner, and low-carbon fly ash is used for cement preparation, brick preparation, etc., which is more fully and reasonably utilized.

[0054] In the present invention, the fly ash sorting device 307 is not particularly limited, and it can be any intelligent or automatic sorting device or system for fly ash sorting that is commercially available or purchased, as long as it can meet the processing capacity requirements. The principle of sorting fly ash into high-carbon fly ash and low-carbon fly ash is to use the suspension speed and density difference of each component in the fly ash in the airflow, and to achieve the separation of high-carbon and low-carbon fly ash by adjusting the airflow speed and direction. In addition to using a separate detection and separation device, a comprehensive processing system can also be used to achieve the separation of high-carbon and low-carbon fly ash. These systems usually include multiple steps such as crushing, screening, grinding, grading, magnetic separation, flotation, etc., and the different components in the fly ash are finely separated through a series of physical and chemical processes. In some specific embodiments of the present invention, the fly ash sorting system 307 is a pneumatic sorting system, such as a Fangda sorting machine, which uses mechanical forced vortex ash gas rotation and secondary cyclone regulation to efficiently grade fly ash.

[0055] Smelting slag is a mixture of harmful elements and other impurities replaced during the smelting process. It is one of the important products of the smelting and refining of steel, ferroalloys and non-ferrous heavy metals. The treatment and utilization of smelting slag is an important environmental protection and resource issue. Through reasonable treatment and utilization, it can not only reduce environmental pollution, but also achieve resource recycling. For example, the useful components in the slag can be recovered and reused by using technical means such as sorting, grinding, magnetic separation, and flotation.

[0056] The purpose of the metal extraction device 308 is to extract the metal from the smelting slag. There is no special limitation on the metal extraction device 308, which can be any intelligent or automatic sorting device or system for metal extraction that is commercially available or purchased, as long as it can meet the processing capacity requirements. In addition, the metal extraction device 308 can also be a combination of some devices. In some specific embodiments of the present invention, the metal extraction device 308 is a combination of sorting, grinding, magnetic separation and flotation.

[0057] The slag described in the present invention is the residue formed by the separation of impurities from metals through oxidation during smelting, or the blocky coke slag condensed after coal combustion. During the smelting process, the slag floats on the surface of liquid substances such as metals, and is mainly composed of oxides, sulfides, and a small amount of metal. After proper treatment, the slag is used as aggregate or additive to produce building materials, such as slag bricks, slag cement, etc.

[0058] The tailings mentioned in the present invention refer to the part of the ore that has a low content of useful target components and cannot be directly used for production after sorting during the ore dressing process. After processing, it is used as a raw material for building materials such as cement and bricks.

[0059] The coal gangue described in the present invention is solid waste discharged during the coal mining and coal washing processes. It is a black-gray rock with a low carbon content and harder than coal that is associated with the coal seam during the coal formation process. It includes excavation gangue during tunnel excavation, gangue mined from the roof, floor and interlayer during mining, and washed gangue picked out during coal washing.

[0060] The coordinated processing system at least includes a recycled metal production device 401, a recycled glass production device 402, a wood recycling device 403, an improver preparation device 404, a cement preparation device 405, and a brick making device 406; the recycled metal production device 401 is connected to at least one of the waste metal outlet of the garbage fine sorting device 101, the waste metal outlet of the construction waste sorting device 201, and the metal extraction outlet of the metal extraction device 308; the recycled glass device 402 is connected to at least one of the waste glass outlet of the garbage fine sorting device 101 and the waste glass outlet of the construction waste sorting device 201; the wood recycling device 403 is connected to at least one of the waste glass outlets of the garbage fine sorting device 101 and the waste glass outlet of the construction waste sorting device 201; It is connected to one of the waste bamboo and wood outlets of the garbage fine sorting device 101 and the waste wood outlet of the construction waste classification and sorting device 201; the improver preparation device 404 is connected to at least one of the bio-drying product outlet of the bio-drying device 104 in the domestic waste resource utilization unit and the high-carbon fly ash outlet of the fly ash sorting device 307; the cement preparation device 405 and the brick making device 406 are connected to at least one of the low-carbon fly ash outlet of the fly ash sorting device 307 of the industrial solid waste resource utilization unit, the slag storage 304, the tailings storage 305, the coal gangue storage 306 and the powdered aggregate storage of the construction waste resource utilization unit.

[0061] The purpose of the recycled metal production device 401 is to reuse the metal after classification and recycling. There is no special limitation on the recycled metal production device 401, which can be a commercially available or commercially purchased equipment for metal recycling as long as it can meet the processing volume requirements. In addition, it can also be a comprehensive processing system. For example, in some specific embodiments of the present invention, the recycled metal processing device 401 includes cleaning, crushing, smelting furnace, refining furnace, casting machine and other equipment.

[0062] The purpose of the recycled glass production device 402 is to reuse the classified recycled glass. There is no special limitation on the recycled glass production device 402, which can be a commercially available or commercially available device for glass recycling as long as it can meet the processing volume requirements. For example, in some specific embodiments of the present invention, the recycled glass production device 402 includes a crusher, a furnace, etc.

[0063] The purpose of the wood recycling device 403 is to reuse the recycled waste bamboo and wood. The wood recycling device 40 is not particularly limited, and it can be a commercially available or commercially available device for processing wood raw materials, as long as it can meet the processing capacity requirements. In addition, it can also be a comprehensive processing system. In some specific embodiments of the present invention, the wood recycling device is a board manufacturing production line and / or a wood carbonization production line.

[0064] The purpose of the improver preparation device 404 is to prepare soil improver by using the product of further drying of organic matter sorted from domestic waste and high carbon fly ash in the industrial solid waste treatment system. The improver preparation device 404 is not particularly limited. For example, in some specific embodiments of the present invention, the improver preparation device 404 is a stirring tank.

[0065] There is no special limitation on the cement preparation device 405 and the brick making device 406. The purpose of the devices is to prepare cement and bricks, and conventional production lines can be used.

[0066] In some specific embodiments of the present invention, the domestic waste resource utilization unit also includes a waste plastic recycling device 102 connected to the waste plastic outlet, a waste fabric recycling device 103 connected to the waste fabric outlet, and a fertilizer production device 105 connected to the bio-drying product outlet of the bio-drying device.

[0067] There is no special limitation on the waste plastic recycling device 102, the waste fabric recycling device 103 and the material production device 105. They can be commercially available or purchased single processing devices or production lines composed of multiple devices.

[0068] In some other specific embodiments of the present invention, the construction waste resource utilization unit also includes at least a backfill material storage tank 202 connected to the brick, stone and concrete outlet.

[0069] In some other specific embodiments of the present invention, the industrial solid waste resource utilization unit also includes at least an α-type high-strength gypsum preparation device 309 connected to the industrial by-product gypsum storage tank, and the industrial by-product gypsum is further used as a raw material to prepare α-type high-strength gypsum to increase its value.

[0070] In some other specific embodiments of the present invention, the outlet of the cement preparation device 405 is connected to at least one of the mortar production line 204, the block production line 205 and the wallboard production line 206. The prepared cement is further used to prepare mortar, blocks, wallboards, etc., so as to better realize the comprehensive recycling of resources.

[0071] The multi-source solid waste collaborative treatment system constructed by the present invention can coordinate the treatment between the systems, and the value of various types of waste resources can be fully explored, the scale and quality of the resource recycling industry are improved, the waste resource recycling methods are expanded, and the waste recycling value can be effectively improved.

[0072] The present invention also provides a method for co-processing multi-source solid wastes, such as Figure 2As shown, the method adopts the above-mentioned multi-source solid waste coordinated treatment system for treatment, which includes a domestic waste treatment process, a construction waste treatment process, an industrial solid waste treatment process and a coordinated treatment process;

[0073] The domestic waste treatment process at least includes the steps of finely sorting the domestic waste to obtain waste metal, waste glass, waste bamboo and wood, waste fabric, waste plastic and organic waste, and bio-drying the organic waste to obtain bio-dried products;

[0074] The construction waste treatment process at least includes the steps of classifying and sorting the construction waste to obtain waste metal, waste glass, waste wood, bricks, stones and concrete, crushing the bricks, stones and concrete as aggregates, and screening the crushed aggregates to obtain coarse aggregates, fine aggregates and powdered aggregates, preparing mortar using the fine aggregates, preparing blocks using at least one of the coarse aggregates, fine aggregates and powdered aggregates, and preparing wallboards using the coarse aggregates and / or fine aggregates;

[0075] The industrial solid waste treatment process at least includes the steps of classifying the industrial solid waste to obtain industrial by-product gypsum, fly ash, smelting slag, slag, tailings, and coal gangue, extracting metals from the smelting slag, and sorting the fly ash into high-carbon fly ash and low-carbon fly ash;

[0076] The coordinated processing steps at least include metal recycling and manufacturing of scrap metals obtained from the domestic waste treatment process, scrap metals obtained from the construction waste treatment process, and metals extracted from the industrial solid waste treatment process; recycling glass manufacturing of waste glass obtained from the domestic waste treatment process and waste glass obtained from the construction waste treatment process; board manufacturing or carbonization treatment of waste bamboo and wood obtained from the domestic waste treatment process and waste wood obtained from the construction waste treatment process; using the bio-drying product obtained from the domestic waste treatment process and the high-carbon fly ash obtained from the industrial solid waste treatment process to prepare soil conditioners; and using the low-carbon fly ash, slag, tailings, and coal gangue obtained from the industrial solid waste treatment process to make bricks or cement.

[0077] In some specific embodiments of the present invention, the co-processing step further includes a step of using the prepared cement to prepare one or more of mortar, blocks and wall panels.

[0078] In some other specific embodiments of the present invention, the domestic waste treatment process further includes the steps of recycling waste fabrics and waste plastics and / or preparing fertilizers using the bio-dried products.

[0079] In some other specific embodiments of the present invention, the industrial solid waste treatment process further includes the step of preparing α-type high-strength gypsum using industrial by-product gypsum.

[0080] In other specific embodiments of the present invention, the aggregates (or undersize) remaining after the sorting, screening and bio-drying of domestic waste enter the construction waste treatment system to be made into building materials, and the solid waste generated in the process of resource utilization of waste plastics, waste textiles and other components is treated as industrial solid waste. The wood and other miscellaneous materials that cannot be treated in the construction waste treatment process enter the industrial solid waste treatment process.

[0081] The above-mentioned multi-source solid waste collaborative treatment method provided by the present invention follows the circular economy development concept of solid waste reduction, reuse and resource utilization, aims to improve resource utilization efficiency, takes waste fine management, effective recycling and efficient utilization as the path, covers the production and life fields, and collaboratively utilizes wastes from all links to increase the utilization of renewable resources and enhance the output value of the entire resource recycling industry. Through material circulation, energy circulation, facility sharing, information sharing, etc., it realizes the comprehensive treatment and resource utilization of urban solid waste, embodies the circular economy, and can build the park into a comprehensive treatment and resource recycling base for urban solid waste with distinctive characteristics. Its processing capacity can reach 2000-4000 tons / day, and the processing capacity can be further expanded through parallel setting.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-source solid waste collaborative treatment system, characterized in that: Including domestic waste treatment system, construction waste treatment system, industrial solid waste treatment system and coordinated treatment system; The domestic waste treatment system includes a domestic waste sorting unit and a domestic waste resource utilization unit. The domestic waste sorting unit includes at least a waste fine sorting device, and the waste fine sorting device is provided with at least a waste metal outlet, a waste glass outlet, a waste bamboo and wood outlet, a waste fabric outlet, a waste plastic outlet and an organic waste outlet; the domestic waste resource utilization unit includes at least an organic waste biological drying device connected to the organic waste outlet; The construction waste treatment system includes a construction waste classification and sorting unit and a construction waste resource utilization unit. The construction waste classification and sorting unit at least includes a construction waste classification and sorting device. The construction waste classification and sorting device is at least provided with a waste metal outlet, a waste glass outlet, a waste wood outlet, and a brick, stone and concrete outlet. The construction waste resource utilization unit at least includes a backfill material storage tank and an aggregate processing device connected to the brick, stone and concrete outlet. The aggregate processing device at least includes an aggregate crushing component, an aggregate screening component, a coarse aggregate storage tank, a fine aggregate storage tank and a powdered aggregate storage tank, a mortar production line connected to the fine aggregate storage tank, a block production line connected to one or more of the coarse aggregate storage tank, the fine aggregate storage tank and the powdered aggregate storage tank, and a wallboard production line connected to the coarse aggregate storage tank and / or the fine aggregate storage tank. The industrial solid waste treatment system includes an industrial solid waste classification unit and an industrial solid waste resource utilization unit. The industrial solid waste classification unit includes at least an industrial by-product gypsum storage reservoir, a fly ash storage reservoir, a smelting slag storage reservoir, a slag storage reservoir, a tailings storage reservoir and a coal gangue storage reservoir; the industrial solid waste resource utilization unit includes at least a fly ash sorting device connected to the fly ash storage reservoir and a metal extraction device connected to the smelting slag storage reservoir, and the fly ash sorting device is provided with a high-carbon fly ash outlet and a low-carbon fly ash outlet; The coordinated processing system at least includes a recycled metal production device, a recycled glass production device, a wood recycling device, an improver preparation device, a cement preparation device, and a brick making device; the recycled metal production device is connected to at least one of the waste metal outlet of the garbage fine sorting device, the waste metal outlet of the construction waste classification and sorting device, and the metal extraction outlet of the metal extraction device; the recycled glass device is connected to at least one of the waste glass outlet of the garbage fine sorting device and the waste glass outlet of the construction waste classification and sorting device; the wood recycling device is connected to at least one of the waste bamboo and wood outlet of the garbage fine sorting device and the waste wood outlet of the construction waste classification and sorting device; the improver preparation device is connected to at least one of the bio-drying product outlet of the bio-drying device in the domestic waste resource utilization unit and the high-carbon fly ash outlet of the fly ash sorting device; the cement preparation device and the brick making device are connected to at least one of the low-carbon fly ash outlet of the fly ash sorting device of the industrial solid waste resource utilization unit, the slag storage, the tailings storage, the coal gangue storage, and the powdered aggregate storage of the construction waste resource utilization unit.

2. The multi-source solid waste coordinated treatment system according to claim 1, characterized in that: The domestic waste resource utilization unit at least includes a waste plastic recycling device connected to the waste plastic outlet, a waste fabric recycling device connected to the waste fabric outlet, and a fertilizer production device connected to the bio-drying product outlet of the organic waste bio-drying device.

3. The multi-source solid waste coordinated treatment system according to claim 1, characterized in that: The construction waste resource utilization unit at least includes a backfill material storage tank connected to the brick, stone and concrete outlets.

4. The multi-source solid waste coordinated treatment system according to claim 1, characterized in that: The industrial solid waste resource utilization unit at least includes an α-type high-strength gypsum preparation device connected to an industrial by-product gypsum storage tank.

5. The multi-source solid waste coordinated treatment system according to claim 1, characterized in that: The outlet of the cement preparation device is connected to at least one of the mortar production line, the block production line and the wallboard production line.

6. The multi-source solid waste coordinated treatment system according to claim 1, characterized in that: The wood recycling device is a board manufacturing production line and / or a wood carbonization production line.

7. A method for co-processing multi-source solid waste, characterized in that: The multi-source solid waste coordinated treatment system according to any one of claims 1 to 6 is used for treatment, including a domestic waste treatment process, a construction waste treatment process, an industrial solid waste treatment process and a coordinated treatment process; The domestic waste treatment process at least includes the steps of finely sorting the domestic waste to obtain waste metal, waste glass, waste bamboo and wood, waste fabric, waste plastic and organic waste, and bio-drying the organic waste to obtain bio-dried products; The construction waste treatment process at least includes the steps of classifying and sorting the construction waste to obtain waste metal, waste glass, waste wood, bricks, stones and concrete, crushing the bricks, stones and concrete as aggregates, and screening the crushed aggregates to obtain coarse aggregates, fine aggregates and powdered aggregates, preparing mortar using the fine aggregates, preparing blocks using at least one of the coarse aggregates, fine aggregates and powdered aggregates, and preparing wallboards using the coarse aggregates and / or fine aggregates; The industrial solid waste treatment process at least includes the steps of classifying the industrial solid waste to obtain industrial by-product gypsum, fly ash, smelting slag, slag, tailings, and coal gangue, extracting metals from the smelting slag, and sorting the fly ash into high-carbon fly ash and low-carbon fly ash; The coordinated processing steps at least include metal recycling and manufacturing of scrap metals obtained from the domestic waste treatment process, scrap metals obtained from the construction waste treatment process, and metals extracted from the industrial solid waste treatment process; recycling glass manufacturing of waste glass obtained from the domestic waste treatment process and waste glass obtained from the construction waste treatment process; board manufacturing or carbonization treatment of waste bamboo and wood obtained from the domestic waste treatment process and waste wood obtained from the construction waste treatment process; using the bio-drying product obtained from the domestic waste treatment process and the high-carbon fly ash obtained from the industrial solid waste treatment process to prepare soil conditioners; and using the low-carbon fly ash, slag, tailings, and coal gangue obtained from the industrial solid waste treatment process to make bricks or cement.

8. The method for coordinating treatment of multi-source solid waste according to claim 7, characterized in that: The co-processing step also includes the step of using the prepared cement to prepare one or more of mortar, blocks and wall panels.

9. The multi-source solid waste collaborative treatment method according to claim 7 or 8, characterized in that: The domestic waste treatment process also includes the steps of recycling waste fabrics and waste plastics and / or preparing fertilizers using the biological dried products.

10. The multi-source solid waste collaborative treatment method according to claim 7 or 8, characterized in that: The industrial solid waste treatment process also includes the step of preparing α-type high-strength gypsum using industrial by-product gypsum.

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