A system and method for treating various solid wastes in a recycling industrial park

Abstract

The present invention relates to the field of solid waste treatment, and specifically to a system and method for treating multiple solid wastes in a recycling industrial park. It includes a park domestic waste incineration power generation system, a park sewage treatment system, a municipal sludge treatment system, a food waste, kitchen waste and feces coordinated treatment system, a dead livestock and poultry treatment system, a slag and construction waste coordinated treatment system and a landfill; the dried sludge discharge port of the municipal sludge treatment system, the biogas sludge discharge port of the food waste, kitchen waste and feces coordinated treatment system, the light material discharge port of the slag and construction waste coordinated treatment system and the concentrated liquid discharge port of the park sewage treatment system are connected to the domestic waste incineration power generation system. The system of the present invention realizes the high-efficiency recycling of thermal energy, electrical energy and biomass energy of material resources between different treatment facilities in the park.

Description

Technical Field

[0001] The present invention belongs to the field of solid waste treatment, and specifically relates to a multi-solid waste coordinated disposal process system in a recycling industrial park. Background Art

[0002] Faced with the severe situation of tightening resource constraints, serious environmental pollution and ecosystem degradation, we must establish the ecological civilization concept of respecting, adapting to and protecting nature, give priority to ecological civilization construction, integrate it into all aspects and the entire process of economic, political, cultural and social construction, and strive to build a beautiful China and achieve sustainable development of the Chinese nation.

[0003] The problem of global warming has made the requirements for green development increasingly prominent, and the call for green recovery is growing louder and louder. Low carbonization has become a new trend in global economic development after globalization and informatization. The circular economy has begun to evolve from a low-level single cycle characterized by waste recycling to a multi-level systematic cycle that establishes a self-circulating system for the entire region, showing a new trend of high-end development. Global cities have relied on ecological environment and cultural creativity, and ecological culture has become an important means for global cities to shape their competitive advantages. Increasing investment in environmental protection, energy conservation and emission reduction, and recycling infrastructure construction has become an important measure to promote economic recovery.

[0004] There are various processes in the prior art for treating municipal sludge, food waste, kitchen waste and feces, dead livestock and poultry, and construction waste, but there is no system that can effectively and uniformly treat the solid waste generated in the above waste treatment processes. Summary of the invention

[0005] The present invention relates to a treatment system for various solid wastes in a recycling industrial park, including a domestic waste incineration power generation system in the park, a sewage treatment system in the park, a municipal sludge treatment system, a coordinated treatment system for meal waste, kitchen waste and feces, a diseased livestock and poultry treatment system, a coordinated treatment system for slag and construction waste, and a landfill;

[0006] The dried sludge discharge port of the municipal sludge treatment system, the biogas residue discharge port of the food waste, kitchen waste and feces coordinated treatment system, the light material discharge port of the slag and construction waste coordinated treatment system, and the concentrated liquid discharge port of the park sewage treatment system are connected to the domestic waste incineration power generation system;

[0007] The condensate outlet of the municipal sludge treatment system, the sewage outlet of the food waste, kitchen waste and feces coordinated treatment system, the leachate outlet of the garbage pit in the park domestic waste incineration power generation system, and the condensate outlet of the dead livestock and poultry treatment system are connected to the park sewage treatment system;

[0008] The steam outlet of the domestic waste incineration power generation system is connected to the dead livestock and poultry treatment system and the municipal sludge treatment system.

[0009] In order to achieve comprehensive treatment of solid waste in the park, the present invention sets up a domestic waste incineration treatment system in the park. After the solid waste generated by each system is incinerated, the domestic waste incineration treatment system generates medium-temperature and medium-pressure steam to drive the steam turbine to generate power to meet the power consumption of various electrical equipment in the park. The steam required by other projects in the park can also be obtained from the steam turbine. The energy waste and environmental pollution problems caused by the separate construction of supporting facilities for projects in the park are avoided. The domestic waste incineration plant provides power for the entire park, disposes of residues from other systems, and the generated leachate is synergistically treated with waste liquids generated by other processes. The coordinated treatment of multiple solid wastes in the park is conducive to reducing the construction cost and operating cost of the entire park and facilitating standardized management.

[0010] Preferably, the slag discharge port of the domestic waste incineration power generation system is connected to the slag and construction waste coordinated processing system, and the fly ash discharge port of the domestic waste incineration power generation system is connected to the landfill.

[0011] Preferably, the sludge outlet of the park sewage treatment plant is connected to the municipal sludge treatment system.

[0012] Preferably, the municipal sludge treatment system includes a stirring device, a dehydration device and a drying device which are connected in sequence through pipelines; the discharge port of the drying device is connected to the park domestic waste incineration power generation system; the steam outlet of the park domestic waste incineration power generation system is connected to the drying device; and the water outlet of the dehydration device is connected to the park sewage treatment system.

[0013] At present, there are anaerobic, aerobic, self-incineration and mixed combustion methods for sludge treatment. The stability of anaerobic treatment, the disposal of the final product and the treatment of biogas slurry are particularly prominent, and the reduction is not complete. Aerobic treatment mainly has problems such as product disposal and system odor control. Self-incineration requires high investment costs and requires additional fuel. The mixed combustion described in the present invention can effectively control investment, reduction and environmental protection issues.

[0014] Preferably, the dead livestock and poultry processing system includes a livestock and poultry crusher, a high-temperature cooking machine and a dehydration and degreasing machine; the outlet of the condensed water generated by the dehydration and degreasing machine is connected to the park sewage treatment system, and the steam outlet of the domestic waste incineration power generation system is connected to the high-temperature cooking device.

[0015] After being crushed by the whole animal crusher, it is sterilized by high temperature steaming and melting out the fat, and the meat and bone meal and fat are separated by the dehydration and degreasing machine. The crude fat and meat and bone meal can be transported and sold, and the condensed water is transported to the park sewage plant for treatment to meet the discharge standards. Compared with the independent treatment system for dead livestock and poultry, the advantage of this invention is that it does not require the establishment of a sewage treatment system and a steam generation system, which reduces project investment and saves energy.

[0016] Preferably, the coordinated treatment system for meal waste, kitchen waste and feces includes a feces treatment system, a meal waste treatment system and a kitchen waste treatment system;

[0017] The feces treatment system comprises a solid-liquid separator, a regulating tank, an anaerobic reactor, a digestate solid-liquid separator and a biogas slurry denitrification and dephosphorization device; the supernatant outlet of the solid-liquid separator is connected to the regulating tank, and the regulating tank, the anaerobic reactor, the digestate solid-liquid separator and the biogas slurry are connected in sequence through pipelines;

[0018] The kitchen waste treatment system comprises a decomposition separator, a pulp-residue separator, a cooking sterilizer, a decontamination device, and a three-phase separation oil extraction device which are connected in sequence, and the organic pulp outlet in the three-phase separation oil extraction device is connected to the regulating tank;

[0019] The kitchen waste treatment system and the kitchen waste treatment system share a decomposition separator, a pulp-residue separator and an impurity removal device, and the organic slurry outlet of the impurity removal device is connected to the regulating tank;

[0020] The biogas slurry outlet of the digestate solid-liquid separator is connected to the park sewage treatment system;

[0021] The sludge outlet of the digestate solid-liquid separator is connected to the domestic waste incineration power generation system.

[0022] Regarding feces, solid-liquid separation is first performed, and the separated liquid is dehydrated by adding flocculants, and then the feces residue and supernatant are separated. The feces residue and the garbage and debris separated from the solid-liquid separation are transported to the waste incineration plant for incineration, and the supernatant is anaerobic in coordination with the organic slurry separated from kitchen waste and dining kitchen waste;

[0023] Regarding restaurant kitchen waste, the main treatment process adopts "pretreatment + oil extraction (organic) + impurity removal + anaerobic fermentation + solid-liquid separation of digestate + sludge drying". The pretreatment system mainly includes: receiving, decomposition and separation, impurity removal, homogenization and other processes. The restaurant kitchen waste is transported to the decomposition and separation machine for decomposition and slurrying to prepare homogenized organic slurry. The upper homogenous slurry is pumped to the unloading tank by the slurrying pump for storage, and the lower slag slurry enters the fiber separator at the bottom for further treatment. The separated slag is first dehydrated by the screw press after the slag extractor. After dehydration, the non-biodegradable materials can be incinerated. The organic slurry of restaurant kitchen waste from the unloading tank is pumped to the sterilization tank to achieve disinfection, sterilization and deodorization of organic waste, and can melt more oil. After the sterilized slurry is removed by the high-concentration impurity removal module to remove non-fermentable impurities that affect anaerobic metabolism, it is sent to the three-phase centrifuge for oil separation. After being processed by the three-phase centrifuge, the separated grease is screened by the disc vibrating screen, then enters the oil buffer tank, and finally pumped to the oil storage tank for storage. The bottlenecks currently encountered in the treatment of food waste are the disposal of biogas residue and the treatment of biogas liquid. Co-treatment is conducive to the disposal of biogas residue, and the coordinated treatment of industrial park sewage is conducive to the treatment of food waste liquid.

[0024] Regarding kitchen waste, non-degradable heavy residue and light residue are separated through decomposition separators, slurry-residue separation and impurity removal equipment, and transported to the waste incineration plant for incineration together with the residue separated from the food waste. The separated organic slurry is transported to the equalization tank for anaerobically treatment together with the supernatant of feces and the organic slurry separated from the food waste.

[0025] The organic slurry of the kitchen waste after the oil is separated, the organic slurry of the kitchen waste section, and the feces supernatant are adjusted in the regulating tank and pumped to the anaerobic digestion system. A large amount of organic materials are removed through the anaerobic section, and the digestate is separated into solid and liquid. The biogas is treated at the sewage treatment station in the park; the biogas residue can be sent to the waste incineration plant for incineration and disposal; the separated non-biodegradable residue (sand, plastic, bamboo, wood, fabric, metal, etc.) is incinerated; the extracted crude oil is shipped and sold; the generated biogas is purified and equipped with a biogas generator set to generate electricity for self-use.

[0026] At present, the disposal of biogas residue produced by anaerobic treatment of various organic matters is a big problem. Biogas residue co-incineration solves the disposal problem of biogas residue. Due to its small particle size, it is directly transported to the boiler feed port by a scraper. Compared with dumping into the garbage pit, it can be more evenly distributed and does not block the leachate collection port. The biogas residue is dehydrated to a moisture content of about 65% by mechanical dehydration.

[0027] The non-biodegradable residue separated from the pre-treatment of food waste, which accounts for about 20% of the total food waste, is directly sent to the garbage pit and the garbage is directly sent to the feed port for incineration through a grab bucket.

[0028] Preferably, the park sewage treatment system includes a pre-sedimentation tank, a regulating tank, an anaerobic tank, an intermediate water tank, a primary denitrification tank, a primary nitrification tank, a secondary reaction nitrification tank, a secondary nitrification tank, an external ultrafiltration membrane tank, a nanofiltration membrane tank and a reverse osmosis tank which are sequentially connected by pipelines;

[0029] The discharge port of the concentrated liquid of the nanofiltration tank is connected to the domestic waste incineration power generation system;

[0030] The sludge discharge port of the external ultrafiltration membrane pool is connected to the sludge treatment system;

[0031] The dehydration device in the municipal sludge treatment system, the outlet of the condensed water produced by the dehydration and degreasing machine in the dead livestock and poultry treatment system, and the sludge outlet of the digestate solid-liquid separator in the coordinated treatment system of food waste, kitchen waste and feces are connected to the pre-sedimentation tank.

[0032] The leachate from the domestic waste incineration power generation system, the condensate from the dead livestock and poultry treatment plant, the sewage from the sludge treatment plant, and the sewage from the restaurant kitchen waste co-treatment plant are lifted by the lifting pump to the regulating tank, and then lifted by the anaerobic water inlet lifting pump to the anaerobic water distribution system and enter the anaerobic reactor. The anaerobic reactor uses the UBF anaerobic reactor. The leachate undergoes anaerobic reaction and COD can be significantly degraded; the anaerobic effluent enters the intermediate water tank, and the intermediate water tank enters the aerobic system through the lifting pump. The biogas produced by the anaerobic process is finally transported to the biogas power generation system through the biogas collection and transportation system.

[0033] The wastewater in the intermediate water tank is lifted by the membrane biochemical reactor water inlet pump, filtered by the bag filter, and then enters the membrane biochemical reactor MBR through the water distribution system to biochemically remove biodegradable organic matter and carry out biological denitrification; since the effluent water quality has strict requirements on total nitrogen, the biochemical part of the membrane biochemical reactor is equipped with two-stage biological denitrification; the SS, ammonia nitrogen, total nitrogen and other indicators of the ultrafiltration effluent of the membrane biochemical reactor have reached the emission standards, and the effluent is deeply treated by nanofiltration and reverse osmosis. After deep treatment by nanofiltration and reverse osmosis, the effluent can meet the emission standards.

[0034] The SS content of the biogas slurry after coordinated anaerobic digestion of food waste is very high, and the C / N ratio of the filtrate after sludge dehydration is unbalanced. The coordinated treatment of various wastewaters is beneficial to adjusting the C / N ratio and is beneficial to the sewage treatment of the entire system.

[0035] Preferably, the slag and construction waste coordinated processing system comprises a slag processing system and a construction waste processing system;

[0036] The slag treatment system comprises a vibrating feeder, a drum screen, a crusher, a magnetic separator, a water separator and a vibrating screener connected in sequence;

[0037] The construction waste treatment system includes a vibrating feeder, a grading drum, an air separator, a grouping crusher, a grading magnetic separator and a vibrating screener;

[0038] The material outlet of the air separator is connected to the domestic waste incineration power generation system.

[0039] The present invention also protects a method for treating solid waste using the system of the present invention. During the treatment process, the treatment of the park sludge includes the following steps:

[0040] The water in the sludge is removed by a dehydration device to reduce its water content to 62-67%, and the water in the sludge is further removed by a drying device to reduce its water content to 38-42%. The sludge is then granulated to a diameter of 18-22 mm.

[0041] In the specific treatment process, the sludge is stirred in the sludge silo, and suitable agents are added to modify the sludge. The sludge is dehydrated to a moisture content of 65% by mechanical dehydration, and the sludge is dehydrated to a moisture content of about 40% by thermal drying such as disc drying or blade drying. The drying heat source comes from steam extraction from the turbine. In order to ensure more stable combustion, the dried sludge is granulated. After actual operation exploration, the sludge with a moisture content of about 40% after drying is granulated. After operation exploration, it is proved that the particle size of about 20mm is more suitable for mixed combustion, which has a good effect on the reduction of fly ash and the control of flue gas, and is more conducive to the stability of the incineration system. The dried sludge of this system is directly transported to the boiler feed port by a scraper. Compared with the garbage pit, it can be more uniform and does not block the leachate collection port. The sewage from mechanical dehydration and the condensed water generated by drying are transported to the park sewage treatment plant for sewage treatment to meet the standards.

[0042] The present invention has the following beneficial effects:

[0043] The present invention can effectively and comprehensively and synergistically treat a variety of solid wastes, which is conducive to the formation of scale effect, centralized control of pollutants, and proper disposal of the final products in the treatment of single materials. In addition, the coordination of the water treatment system in the park is conducive to its treatment, saving project investment, saving land resources and improving energy utilization efficiency. It is also conducive to the integration and linkage of technologies and projects, forming a complete industrial chain pattern, improving energy utilization and equipment utilization, and achieving more economical from the perspective of energy and materials. With efficient utilization and recycling of resources as the core, it has good demonstration benefits in energy conservation and environmental protection: the new model of multi-core solid waste treatment in the recycling industrial park has achieved significant economic benefits, environmental benefits and social benefits. The materials between different treatment facilities in the park realize the high-efficiency recycling of thermal energy, electrical energy and biomass energy of resources. Through the centralized disposal of sewage, odor, noise, residues, etc. generated in the production process, the in vivo digestion of waste is realized, the synergistic treatment of pollutants is realized, and significant environmental benefits are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is the process flow chart of domestic waste incineration;

[0045] Figure 2 It is a municipal sludge treatment process;

[0046] Figure 3 It is a process flow chart for the coordinated treatment of food waste, kitchen waste and feces;

[0047] Figure 4 It is a process flow chart for the treatment of dead livestock and poultry;

[0048] Figure 5 It is the coordinated treatment of construction waste and slag;

[0049] Figure 6 It is the park sewage treatment plant;

[0050] Figure 7 It is the process cycle diagram of the park. DETAILED DESCRIPTION

[0051] The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0052] Example 1

[0053] like Figure 1 As shown in the figure, the process flow chart of domestic waste incineration is displayed. The light materials in the domestic waste, biogas residue, dried sludge and construction waste in the park are transported to the mechanical grate incinerator for incineration, generating medium-temperature and medium-pressure steam to drive the steam turbine to generate power. First, the energy consumption of all electrical equipment in the park is met. The heat source required for other processes in the park can also be provided by the domestic waste incineration plant. The generated slag is processed in coordination with the construction waste to make building materials, and the fly ash is solidified and landfilled. The leachate is transported to the park sewage treatment plant for treatment to meet the standards. The incineration plant's flue gas, odor, leachate, noise and other indicators all meet national standards.

[0054] The domestic waste incineration plant provides power for the entire park and consumes residues from other treatment plants. The generated leachate is treated in coordination with waste liquids from other processes. The coordinated disposal of multiple solid wastes in the park helps reduce the construction and operating costs of the entire park and facilitates standardized management.

[0055] Example 2

[0056] like Figure 2The figure shows the municipal sludge treatment process. The municipal sludge with a moisture content of 80% and the sludge generated by the sewage treatment plant in the park are mixed in the sludge silo, and the appropriate reagents are added to modify the sludge. The sludge is dehydrated to a moisture content of 65% by mechanical dehydration, and then dried with steam generated by the incineration plant. After drying to a moisture content of about 40%, it is transported to the domestic waste incineration plant for incineration. The sewage from mechanical dehydration and the condensed water generated by drying are transported to the sewage treatment plant in the park for sewage treatment to meet the standards.

[0057] Example 3

[0058] like Figure 3 As shown, the coordinated processing technology of food waste, kitchen waste and feces is demonstrated.

[0059] Regarding feces, solid-liquid separation is first performed, and the separated liquid is dehydrated by adding flocculants, and then the feces residue and supernatant are separated. The feces residue and the garbage and debris separated from the solid-liquid separation are transported to the waste incineration plant for incineration, and the supernatant is anaerobic in coordination with the organic slurry separated from kitchen waste and dining kitchen waste;

[0060] Regarding restaurant kitchen waste, the main treatment process adopts "pretreatment + oil extraction (organic) + impurity removal + anaerobic fermentation + solid-liquid separation of digestate + sludge drying". The pretreatment system mainly includes: receiving, decomposition and separation, impurity removal, homogenization and other processes. The restaurant kitchen waste is transported to the decomposition and separation machine for decomposition and slurrying to prepare homogenized organic slurry. The upper homogenous slurry is pumped to the unloading tank by the slurrying pump for storage, and the lower slag slurry enters the fiber separator at the bottom for further treatment. The separated slag is first dehydrated by the screw press after the slag extractor. After dehydration, the non-biodegradable materials can be incinerated. The organic slurry of restaurant kitchen waste from the unloading tank is pumped to the sterilization tank to achieve disinfection, sterilization and deodorization of organic waste, and can melt more oil. After the sterilized slurry is removed by the high-concentration impurity removal module to remove non-fermentable impurities that affect anaerobic metabolism, it is sent to the three-phase centrifuge for oil separation. After being processed by the three-phase centrifuge, the separated oil is screened by the disc vibrating screen, then enters the oil buffer tank, and finally pumped to the oil storage tank for storage.

[0061] Regarding kitchen waste, non-degradable heavy residue and light residue are separated through decomposition separators, slurry-residue separation and impurity removal equipment, and transported to the waste incineration plant for incineration together with the residue separated from the food waste. The separated organic slurry is transported to the equalization tank for anaerobically treatment together with the supernatant of feces and the organic slurry separated from the food waste.

[0062] The organic slurry of the kitchen waste after the oil is separated, the organic slurry of the kitchen waste section, and the feces supernatant are adjusted in the regulating tank and pumped to the anaerobic digestion system. A large amount of organic materials are removed through the anaerobic section, and the digestate is separated into solid and liquid. The biogas is treated at the sewage treatment station in the park; the biogas residue can be sent to the waste incineration plant for incineration and disposal; the separated non-biodegradable residue (sand, plastic, bamboo, wood, fabric, metal, etc.) is incinerated; the extracted crude oil is shipped and sold; the generated biogas is purified and equipped with a biogas generator set to generate electricity for self-use.

[0063] Example 4

[0064] like Figure 4 As shown in the figure, the process of processing dead livestock and poultry is shown. The collected livestock carcasses are sent to the cold storage for buffering and classification. They are crushed by the whole animal crusher and then sterilized by high-temperature steaming to melt out the fat. The meat and bone meal and fat are separated by the dehydration and degreasing machine. The crude fat and meat and bone meal can be shipped out for sale, and the condensed water is transported to the park sewage plant for treatment to meet the discharge standards.

[0065] Example 5

[0066] like Figure 5 As shown in the figure, the coordinated treatment process of construction waste and slag is demonstrated. The slag generated by the waste incineration plant is coordinated with the construction waste. The slag is treated by vibrating feeding, drum screen, crushing, magnetic separation, water separation, vibrating screening and other processes to produce recycled slag coarse aggregate and recycled slag fine aggregate; the construction waste is treated by vibrating feeding, grading drum, air separator, graded crushing, graded magnetic separation, vibrating screen and other processes to finally produce high-quality recycled aggregate, recycled brick and tile coarse aggregate and recycled concrete coarse aggregate; the slag screened by the grading drum can be used as landfill soil or planting soil; the light materials selected by the air separator are transported to the waste incineration plant for incineration; the metals selected by the treatment plant can be shipped out and sold;

[0067] Example 6

[0068] like Figure 6 The figure shows the sewage treatment process in the park. The leachate from the garbage incineration plant, the condensate from the dead livestock and poultry treatment plant, the sewage from the sludge treatment plant, and the sewage from the kitchen waste and feces collaborative treatment plant are lifted by the lifting pump to the regulating tank, and then lifted by the anaerobic water inlet lifting pump to the anaerobic water distribution system and enter the anaerobic reactor. The anaerobic reactor uses the UBF anaerobic reactor. The leachate undergoes anaerobic reaction and COD can be greatly degraded; the anaerobic effluent enters the intermediate water tank, and the intermediate water tank enters the aerobic system through the lifting pump. The biogas produced by anaerobic is finally transported to the biogas power generation system through the biogas collection and transportation system;

[0069] The wastewater in the intermediate water tank is lifted by the membrane biochemical reactor water inlet pump, filtered by the bag filter, and then enters the membrane biochemical reactor MBR through the water distribution system to biochemically remove biodegradable organic matter and carry out biological denitrification; since the effluent water quality has strict requirements on total nitrogen, the biochemical part of the membrane biochemical reactor is equipped with two-stage biological denitrification; the SS, ammonia nitrogen, total nitrogen and other indicators of the ultrafiltration effluent of the membrane biochemical reactor have reached the emission standards, and the effluent is deeply treated by nanofiltration and reverse osmosis. After deep treatment by nanofiltration and reverse osmosis, the effluent can meet the emission standards.

[0070] Figure 7 The park's process circulation system is displayed. The entire park is based on waste incineration power generation as the main line. The incineration plant can incinerate other process dried sludge, light materials, non-degradable residues, etc., to provide electricity and steam heat sources for other processes; a sewage treatment plant is set up in the entire park to treat the leachate of the domestic waste incineration plant, the sewage of the sludge treatment plant, the sewage of the coordinated kitchen waste treatment plant, the condensate of the dead livestock and poultry treatment plant and other wastewater in the factory area. The treated reclaimed water that meets the standards can be reused in the waste incineration plant; the domestic waste incineration plant provides electricity and steam heat sources for the sludge plant, steam heat sources for the dead livestock and poultry treatment plant, steam heat sources for the sewage treatment plant, and electricity for the construction waste treatment plant; the slag generated by the domestic waste incineration power generation system is coordinated with the construction waste; the fly ash generated by the domestic waste incineration power generation system is solidified and transported to the landfill for landfill.

[0071] Although the present invention has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A system for treating various solid wastes in a recycling industrial park. It is characterized in that Including the park's domestic waste incineration power generation system, the park's sewage treatment system, the municipal sludge treatment system, the coordinated treatment system for food waste, kitchen waste and feces, the dead livestock and poultry treatment system, the coordinated treatment system for slag and construction waste and the landfill; The dried sludge discharge port of the municipal sludge treatment system, the biogas residue discharge port of the coordinated treatment system for food waste, kitchen waste and feces, the light material discharge port of the coordinated treatment system for slag and construction waste, and the concentrated liquid discharge port of the park sewage treatment system are connected to the park domestic waste incineration power generation system; The condensate outlet of the municipal sludge treatment system, the sewage outlet of the food waste, kitchen waste and feces coordinated treatment system, the leachate outlet of the garbage pit in the park domestic waste incineration power generation system, and the condensate outlet of the dead livestock and poultry treatment system are connected to the park sewage treatment system; The steam outlet of the park domestic waste incineration power generation system is connected to the dead livestock and poultry treatment system and the municipal sludge treatment system; The slag discharge port of the domestic waste incineration power generation system of the park is connected to the slag and construction waste coordinated treatment system, and the fly ash discharge port of the domestic waste incineration power generation system of the park is connected to the landfill; The sludge outlet of the park sewage treatment plant is connected to the municipal sludge treatment system; The municipal sludge treatment system comprises a stirring device, a dehydrating device and a drying device connected in sequence by pipelines; the discharge port of the drying device is connected to the domestic waste incineration power generation system of the park; the steam outlet of the domestic waste incineration power generation system of the park is connected to the drying device; the water outlet of the dehydrating device is connected to the sewage treatment system of the park; The dead livestock and poultry treatment system includes a livestock and poultry crusher, a high-temperature cooking machine and a dehydration and degreasing machine; the outlet of the condensed water generated by the dehydration and degreasing machine is connected to the park sewage treatment system, and the steam outlet of the park domestic waste incineration power generation system is connected to the high-temperature cooking device; The coordinated treatment system for food waste, kitchen waste and feces includes a feces treatment system, a food waste treatment system and a kitchen waste treatment system; The feces treatment system comprises a solid-liquid separator, a regulating tank, an anaerobic reactor, a digestate solid-liquid separator and a biogas slurry denitrification and dephosphorization device; the supernatant outlet of the solid-liquid separator is connected to the regulating tank, and the regulating tank, the anaerobic reactor, the digestate solid-liquid separator and the biogas slurry are connected in sequence through pipelines; The food waste treatment system comprises a decomposition separator, a pulp-residue separator, a cooking sterilizer, an impurity removal device, and a three-phase separation oil extraction device which are connected in sequence, and the organic pulp outlet in the three-phase separation oil extraction device is connected to the regulating tank; The kitchen waste treatment system and the kitchen waste treatment system share a decomposition separator, a pulp-residue separator and an impurity removal device, and the organic slurry outlet of the impurity removal device is connected to the regulating tank; The biogas slurry outlet of the digestate solid-liquid separator is connected to the park sewage treatment system; The sludge outlet of the digestate solid-liquid separator is connected to the domestic waste incineration power generation system of the park; The sewage treatment system of the park includes a pre-sedimentation tank, a regulating tank, an anaerobic tank, an intermediate water tank, a primary denitrification tank, a primary nitrification tank, a secondary reaction nitrification tank, a secondary nitrification tank, an external ultrafiltration membrane tank, a nanofiltration membrane tank and a reverse osmosis tank which are sequentially connected by pipelines; The outlet of the concentrated liquid of the nanofiltration membrane pool is connected to the domestic waste incineration power generation system of the park; The sludge discharge port of the external ultrafiltration membrane pool is connected to the sludge treatment system; The dehydration device in the municipal sludge treatment system, the outlet of the condensed water produced by the dehydration and degreasing machine in the dead livestock and poultry treatment system, and the sludge outlet of the digestate solid-liquid separator in the coordinated treatment system of meal waste, kitchen waste and feces are connected to the pre-sedimentation tank; The slag and construction waste coordinated processing system includes a slag processing system and a construction waste processing system; The slag treatment system comprises a vibrating feeder, a drum screen, a crusher, a magnetic separator, a water separator and a vibrating screener connected in sequence; The construction waste treatment system includes a vibrating feeder, a grading drum, a wind separator, a grouping crusher, a grading magnetic separator and a vibrating screener; The material outlet of the air separator is connected to the domestic waste incineration power generation system of the park.

2. A method for treating solid waste using the system of claim 1, It is characterized in that During the treatment process of the municipal sludge treatment system, the water in the sludge is removed by a dehydration device to reduce the water content to 62-67%, and the water in the sludge is further removed by a drying device to reduce the water content to 38-42%. The sludge is then granulated to have a diameter of 18-22 mm.

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