Small and medium-sized city household garbage sorting treatment system and method

[0066] Example 1

[0067] A sorting and processing system for domestic waste in small and medium-sized cities. The sorting and processing system includes a domestic waste sorting system and a domestic waste treatment system. The domestic waste treatment system is arranged downstream of the domestic waste sorting system, and the domestic waste sorting system and domestic waste treatment The systems all include a transportation system, which includes a crane grab device, a screw conveyor and a belt conveyor. The domestic waste treatment system includes the organic matter treatment system, the sewage treatment system and the non-organic reclaimed material treatment system; the sewage treatment system includes the deodorization system, the sewage treatment system and the hazardous material treatment system; the deodorization system includes the sedimentation chamber and successively The cyclone dust collector, biological deodorizing filter, activated coke adsorption tower and negative pressure exhaust machine are arranged downstream of the settling chamber. In the present invention, the malodorous gas in the temporary storage room and the comprehensive sorting workshop is transported to the settling chamber by the air suction pump through the gas collection pipeline, and then the cyclone dust collector is used to remove dust from the malodorous gas in the settling chamber, and then the dedusted gas is transported to The biological deodorizing filter is processed, and the gas after the biological deodorizing filter is passed into the active coke adsorption tower and discharged by the negative pressure exhaust machine. The filler of the biological deodorizing filter is dried biogas residue and volcanic rock , Oyster shells, pyrite slag.

[0068] The sewage treated by the sewage treatment system comes from the leachate in the garbage temporary storage room. The upflow sludge bed-biological contact oxidation-chemical adsorption-activated coke adsorption-ultrafiltration-nanofiltration combined technology is used to treat the sewage, in which the upflow sludge bed A small amount of activated coke powder is added to the biological contact oxidation reactor, and the treated water is used for workshop cleaning, homogenization and slurry adjustment, plant watering, greening water, etc.

[0069] Among them, the hazardous materials disposal system processes hazardous wastes such as batteries, lamps, and electronic products.

[0070] Among them, the non-organic recyclables processing system separately treats non-organic recyclables such as combustibles, plastics, paper, metal, and sand.

[0071] The organic matter processing system is a combined thermal hydrolysis-anaerobic fermentation system.

[0072] Example 2

[0073] The domestic waste sorting system includes: broken bag splitting device 1, pre-sorting device 2, primary sorting 17, drum screen device, primary sorting device 18, secondary sorting device 16 and vibrating screen device 11; The splitting device 1 includes a cutter device and an electric control box; the electric control box provides power supply for the cutter device. The cutting device adopts a roller hob type, and the blade adopts a four-section two-way expansion and closing blade. The blade is closed when it is broken and opened in both directions when it is self-cleaning. The pre-sorting device 2 is arranged downstream of the broken bag splitting device 1. The pre-sorting device 2 includes a two-stage vibrating screen. The apertures of the vibrating screen are 15mm and 220mm respectively, and the sorting particle size is between 15mm and 220mm. Of domestic garbage. The primary sorting device 17 is arranged downstream of the pre-sorting device 2. The primary sorting device 17 includes manual sorting 3 and metal sorting device 4; metal sorting device 4 is arranged downstream of manual sorting device 3; metal sorting device One 4 includes a magnetic drum and an eddy current separator, where the eddy current separator is arranged downstream of the magnetic drum; the eddy current separator selects non-ferrous metals, and the magnetic drum selects ferrous metals.

[0074] The trommel device includes a primary trommel device 5 and a secondary trommel device 10, the secondary trommel device 10 is arranged downstream of the primary trommel device 5, and is used to screen the undersieve of the primary trommer device 5; The sieve hole of the first-stage trommel device 5 is 45mm and the rotation speed is 20r/min; the sieve hole of the second-stage trommel device 10 is 25mm and the rotation speed is 20r/min.

[0075] The first-level sorting device 18 is arranged downstream of the first-level trommel device 5, and is used to screen the on-screen material of the first-level trommel device 5; the downstream of the second-stage trommel device 10 are respectively provided with a second-stage sorting device 16 and a vibrating screen Device 11; the vibrating screen device 11 is used to screen the under-sieve of the secondary trommel device 10; the secondary sorting device 16 is used to screen the on-screen material of the secondary trommel device 10 and the sieve selected by the vibrating screen device 11 Shangwu. Among them, the vibrating screen device 11 is a vibrating stellar screen, and the disc gap of the vibrating stellar screen is 10×10 mm.

[0076] The first-stage sorting device 18 includes metal sorting device two 6, a first-stage pneumatic peeling and sorting device 7, a first-stage specific gravity screen device 9 and an electrostatic sorting device one 8; the metal sorting device two 6 is set in the first-stage drum screen device Downstream of 5, the composition of the metal sorting device two 6 is the same as that of the metal sorting device one 4; the downstream of the metal sorting device two 6 is provided with a first-level pneumatic stripping and sorting device 7; The air pressure is 2.5~3kPa; the downstream of the first-level pneumatic stripping and sorting device 7 are respectively equipped with a first-level specific gravity screen device 9 and an electrostatic sorting device 8; the first-level specific gravity screen device 9 is sorted and the first-level pneumatic peeling sorting device 7 is separated The light matter separated by the electrostatic separation device 8 is separated by the first-stage pneumatic stripping separation device 7.

[0077] The secondary sorting device 16 includes the metal sorting device 312, the second-stage pneumatic peeling and sorting device 13, the second-stage specific gravity screen device 14 and the electrostatic sorting device 215; the metal sorting device 312 is set in the second-stage drum screen device Downstream of 10, the composition of the metal sorting device 312 is the same as that of the metal sorting device 1-4; the downstream of the metal sorting device 312 is provided with a two-stage pneumatic stripping and sorting device 13, among which the second-stage pneumatic stripping and sorting device 13 The airflow pressure is 1.0~1.5kPa; the downstream of the secondary pneumatic stripping and sorting device 13 are respectively equipped with a secondary gravity screen device 14 and an electrostatic separation device 15; the secondary gravity screen device 14 is sorted and the second pneumatic peeling sorting device 13 Separate the medium matter; the electrostatic separation device 215 separates the light matter separated by the secondary pneumatic stripping separation device 13.

[0078] Example 3

[0079] The combined thermal hydrolysis-anaerobic fermentation system includes a crushing device 19 and a homogenizing device 20, a thermal hydrolysis device 21, an anaerobic fermentation device 22 and a solid-liquid separation device 23 which are sequentially arranged downstream of the crushing device 19. Among them, the homogenizing device 20 includes a homogenizing mixing tank, a rotary fine grid, a paddle mixer, a homogenizing regulator, and a hydrocyclone desander; a paddle mixer is set in the homogenizing mixing tank; the crushed slurry After homogenization, the light floating impurities in the slurry are intercepted by the rotary fine grid, and the sand is regularly discharged by the hydrocyclone desander. The thermal hydrolysis device 21 is a high temperature and high pressure thermal hydrolysis device. The thermal hydrolysis device 21 includes a high temperature and high pressure thermal hydrolysis tank 40, a steam boiler 35, a flash evaporator 36, and a heat exchanger 37. The steam boiler 35 and the high temperature and high pressure hot water The decomposition tank 40 is connected, the flash evaporator 36 is connected with the high temperature and high pressure thermal hydrolysis tank 40, and the flash evaporator 36 is connected with the heat exchanger 37.

[0080] The anaerobic fermentation device 22 includes a fermentation tank 24, an insulation layer 25, a hot steam heating layer 26, a gravel filter 27, a high-pressure biogas spout 28, a biogas stirring device 29 and a biogas collection device; the fermentation tank 24 is a vertical anaerobic fermentation tank The fermentation tank 24 is equipped with a three-probe thermometer and a three-probe pH sensor; the bottom of the fermentation tank 24 is provided with a gravel filter 27; an insulation layer 25 is provided outside the fermentation tank 24; a hot steam heating layer 26 is provided between the insulation layer 25 and the fermentation tank 24, The hot steam heating layer 26 is divided into two parts, which are a steam boiler steam heating layer and a nitrogen-rich steam heating layer for atmospheric vaporization of biogas liquid, which can be selectively communicated with each other. A biogas stirring device 29 is installed inside the fermentation tank 24; a biogas collection device is installed on the top of the fermentation tank 24. Among them, the biogas collection device includes a biogas hood 30, a buffer gas tank 31, an adsorption tower 32, a vortex flow meter 33, and a gas storage tank 34; the biogas hood 30 is arranged on the top of the fermentation tank 24; the biogas hood 30 is connected to the buffer gas tank 31; The buffer gas tank 31 is connected to the adsorption tower 32; the adsorption tower 32 is connected to the gas storage tank 34; the gas storage tank 34 is connected to the high-pressure biogas spout 28, and the gas storage tank 34 is connected to the steam boiler 35. The fermentation tank 24 is provided with high-pressure biogas spouts 28, with no less than 4 high-pressure biogas spouts 28, and the high-pressure biogas spouts 28 are centrally symmetrically distributed around the fermentation tank 24.