CN104289503A - Garbage disposal system and method - Google Patents
Garbage disposal system and method Download PDFInfo
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- CN104289503A CN104289503A CN201410561976.6A CN201410561976A CN104289503A CN 104289503 A CN104289503 A CN 104289503A CN 201410561976 A CN201410561976 A CN 201410561976A CN 104289503 A CN104289503 A CN 104289503A
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Abstract
The invention relates to a garbage disposal system and a garbage disposal method. The system comprises a garbage crushing and extruding device, a garbage drying device, a deodorization device, a filtrate treatment device and a garbage screening device. The method comprises the following steps: S1, receiving and storing the garbage, and collecting the landfill leachate; S2, crushing and extruding the garbage at a time by utilizing the garbage crushing and extruding device, and collecting the garbage extrusion liquid; S3, performing anaerobic fermentation, nitration/denitrification and membrane treatment on the landfill leachate and the extrusion liquid; S4, biologically drying the garbage by utilizing the garbage drying device, and treating odor by utilizing the deodorization device; and S5, performing secondary crushing on the garbage, and separating out combustible components, inorganic residue soil and waste metals in the dried garbage by utilizing the garbage screening device. According to the system and the method, the landfill leachate, the garbage extrusion liquid and the odor can be effectively treated, the treated solid wastes can be sorted, the aim of recycling the resources is achieved, and the garbage treatment efficiency is obviously improved.
Description
Technical field
The present invention relates to a kind of refuse disposal system and method.
Background technology
It is world subject that municipal garbage " innoxious, minimizing, resource " processes utilization.The method that focuses on of current China town and country municipal garbage mainly contains landfill, compost, burning.Landfill method floor space is large, low to the minimizing degree of rubbish, need do Anti-seeping technology, also will build methane recovery and percolate treatment plant, easily pollute underground water and surrounding air.Composting process is applicable to processing containing the many rubbish of perishable organic matter, and can realize the comprehensive utilization of part resource, but compost quality is wayward, harmful components usually exceed standard.Waste incineration and generating electricity is very fast in China's development, but investment is large, and operating cost is high, the flying dust harmfulness of Han bioxin and heavy metal is large, difficult treatment, although have employed very advanced and complicated cleaning system, in flue gas, bioxin is still difficult to control and monitoring." minimizing, resource, innoxious " principle in order to fully demonstrate, people are proposed various municipal garbage comprehensive processing technique.In existing garbage treating process, there is following problem:
For reducing moisture in rubbish, before garbage drying, fragmentation and extruding being carried out to primary municipal garbage, contributing to improving garbage drying efficiency further.But the high concentrated organic wastewater that liquid is a kind of complicated component extruded by the rubbish that pressing waste produces.Through detecting, its solid impurity content is about 14%, and COD (COD) reaches 110000-120000mg/L.Rubbish is extruded to this characteristic of liquid, need to design targetedly and extrude liquid disposing technique, extrude solid impurity and COD content in liquid to reduce, make to extrude hydroful foot concerned countries standard-required, qualified discharge after process.
In existing garbage treating process, by primary municipal garbage after fragmentation squeezing, drying and other treatment need be carried out.Existing drying and other treatment technique is mostly exhausting mummification and heating and drying, and bottom mummification district, rubbish is easily piled up and hardened, and causes percolate to flow out, reduces garbage drying efficiency; Percolate can be accumulated in bottom mummification district, and fermentation produces fuel gas, causes potential safety hazard.
Can produce percolate while garbage drying, through detecting, its solid impurity content is lower than 1%, and COD (COD) very high concentrations is within the scope of 50000 ~ 75000mg/L.The equal centralized collection of percolate produced in usual garbage drying process in collecting-tank, and is delivered to sewage disposal system by the immersible pump bottom leachate collection pond, discharges after percolate process is up to standard.Because the silt of percolate easily blocks immersible pump.Immersible pump is placed at the bottom of leachate collection pond, is easily corroded by percolate, and maintenance difficulty.Meanwhile, immersible pump instability of flow, easily brings impurity into, affects follow-up handling procedure.Due to the problems referred to above of existing garbage treating process, causing the treatment effeciency of rubbish low, there is situation not up to standard in extrude liquid and percolate after process, and device maintenance rate in system is high.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of refuse disposal system and the method that improve garbage treatment efficiency.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of refuse disposal system, comprises refuse breaking pressurizing unit, garbage drying device, odor removal, filtrate treating apparatus and sieving garbage device;
Reduce moisture in rubbish by garbage drying device, when rubbish storage and garbage drying, produce percolate;
By refuse breaking pressurizing unit, fragmentation and extrusion process are carried out to rubbish, produce rubbish and extrude liquid;
By described filtrate treating apparatus to described percolate with extrude liquid and carry out anaerobic fermentation, nitrated/denitrification and film process;
The foul smell produced during described odor removal disposal of refuse process;
Described sieving garbage device isolates the combustible component in mummification rubbish, inorganic dregs and discarded metal.
In such scheme, described garbage drying device comprises garbage drying district, removable cover plate is provided with above described garbage drying district, described removable cover plate is connected with motor, material-hent claw is provided with above described removable cover plate, ventilation separation layer is provided with bottom described garbage drying district, ventilation airduct, screen, described screen is positioned at the bottom, described ventilation airduct is between screen and ventilation separation layer, the percolate guiding gutter that middle low both sides are high is provided with below described screen, percolate flows in percolate collecting pit through described percolate guiding gutter, the blower fan be connected with ventilation airduct is set outside mummification district.
In such scheme, described filtrate treating apparatus comprises leachate collection pond, first screw pump, pretreatment pool, second screw pump, heater, anaerobic fermentation tank, nitrated/denitrification device, ultra-filtration membrane device, nano filter membrance device, reverse osmosis membrane apparatus, clear water reserviors and concentrated liquid pool, described leachate collection pond, first screw pump, pretreatment pool, second screw pump is connected successively with heater, water diversion tank is provided with between described leachate collection pond and the first screw pump, described nitrated/denitrification device also successively with ultra-filtration membrane device, nano filter membrance device, reverse osmosis membrane apparatus is connected with clear water reserviors, described ultra-filtration membrane device, nano filter membrance device is connected with described concentrated liquid pool with reverse osmosis membrane apparatus.
In such scheme, described filtrate treating apparatus also comprises screw pump and centrifuge; The below of described refuse breaking pressurizing unit is provided with extrudes liquid collecting pit, and the described liquid of extruding extruded in liquid collecting pit is delivered in described pretreatment pool by described screw pump; Described extruding between liquid collecting pit and screw pump is provided with water diversion tank, is provided with Y-piece road filter between described screw pump and described pretreatment pool; Described centrifuge connect described nitrated/denitrification device and anaerobic fermentation tank; Described refuse breaking pressurizing unit is also connected with rubbish flusher, and described rubbish flusher is connected with percolate collecting pit with described centrifuge outlet conduit.
Present invention also offers a kind of waste disposal method utilizing above-mentioned refuse disposal system, it is characterized in that, comprise the following steps:
S1, reception store rubbish, collect percolate;
S2, utilize refuse breaking pressurizing unit to carry out primary fragmentation and extruding to rubbish, collect rubbish and extrude liquid;
S3, to percolate with extrude liquid and carry out anaerobic fermentation, nitrated/denitrification and film process;
S4, utilize garbage drying device to carry out biological dewatered to rubbish, utilize odor removal process foul smell;
S5, second-time breakage is carried out to rubbish, utilize sieving garbage device to isolate the combustible component in mummification rubbish, inorganic dregs and discarded metal.
In such scheme, described step S3 comprises further:
S31, percolate promote and conveying; By the first screw pump, the percolate in leachate collection pond is delivered to pretreatment pool and carries out pretreatment, heater will be sent into through pretreated percolate by the second screw pump;
S32, extrude liquid promote with filter; Under the traction of screw pump on the ground, liquid of extruding in collecting pit is drawn to ground water diversion tank by inserting subsurface pipeline, in water diversion tank, extrudes the contamination precipitation in liquid, supernatant liquid, then by screw pump sucking-off, delivers to pretreatment pool after Y-piece road metre filter;
S33, anaerobic fermentation; Filtrate flow in pretreatment pool, to heater, while adding heated effluent, allows incrustation ion fouling on heating surface bank in waste liquid; Be heated to the filtrate after 30-36 DEG C, enter anaerobic fermentation tank generation anaerobic reaction, the biogas of generation delivers to methane utilizing system, and the waste heat that methane utilizing system produces is as the thermal source of heating calcium-removing device;
S34, nitrated/denitrification and film process; Exudate after anaerobic fermentation, after centrifuge is separated, enter nitrated/denitrification device, organic and inorganic nitride in removing waste liquid, the waste liquid of discharging from nitrated/denitrification device is after blue formula filter or bag filter filter, enter ultrafiltration/reverse osmosis membrane system, heavy metal in waste liquid, bacterium, virus, colloid, iron rust, suspension, silt, larger molecular organics are retained filtration, the clear liquid after purification is sent into clear water reserviors qualified discharge or is recycled.
In such scheme, the garbage drying process in described step S4 is: by rubbish after fragmentation squeezing, be transferred to garbage drying district by material-hent claw, starter motor, close removable cover plate above mummification district, close mummification district, allow rubbish keep 2-3 days under little air quantity or stuffy condition; The waste liquid of garbage filter, by the grid of screen, flows into the percolate guiding gutter under mummification district, flows into leachate collection pond by this guiding gutter; After 2-3 days nature temperature raising periods, open the blower fan be connected with the airduct that ventilates, air blast in mummification district, and regulate blower air quantity, promote the quick growth of aerobic microbiological in junk-heap body, and then old process is carried out to the labile organic compound in house refuse, its moisture is disengaged.
In such scheme, in described step S5, after twice deironing operation is carried out to rubbish after mummification, carry out second time fragmentation, then experience aidr bells blast system and deferrization process, isolate the inorganic dregs of major part in mummification rubbish and whole discarded metal; After sorting, mummification rubbish is through rotary screen, rubbish is classified as size <60mm component and >60mm component; To being less than 60mm component, utilize pneumatic separating principle, by the adjustment of wind speed, wind direction, the lightweight combustible component making size be less than 60mm is separated with the inorganic dregs of heavy; To the component being greater than 60mm, utilize inertia grading principle, the lightweight combustible component making size be greater than 60mm is separated with heavy masonry components; For the lightweight combustible component being greater than 60mm, circulation enters disintegrating machine, within its size is down to 60mm.
Implement refuse disposal system of the present invention and method, there is following beneficial effect:
1, on squeezing device for solid waste, be equipped with rubbish flusher, the waste water flushing crude waste utilizing solid impurity lower, washes out inorganic impurity in rubbish, is conducive to the sorting of follow-up rubbish and the raising of calorific value.
2, the method adopting rubbish spontaneous fermentation intensification to combine with aerobic fermentation, improves garbage drying efficiency.Adopt air blast mummification can prevent mummification district bottom sanitary fill harden, wind-force circulation is more smooth and easy, and be conducive to aerobic fermentation, therefore mummification efficiency is higher.Percolate flows into external leachate collection pond immediately through percolate guiding gutter, avoids percolate and accumulate fermentation in mummification district, produces the potential safety hazard of fuel gas.
3, substitute immersible pump at the bottom of reservoir with exposing to ground screw pump, ensure stability of flow in waste liquid course of conveying, Maintenance and Repair are easy to operate, solve the problem of easy blocked, the corrosion of immersible pump simultaneously.
4, build deliming platform, while adding heated effluent, employing fouling mode removes the main incrustation ion Ca in percolate
2+, protect follow-up device for treating leachate.
5, the methane recovery that anaerobic fermentation produces is used in the equipment such as boiler or generator, in biogas utilization process.The waste heat produced as the thermal source of heater, for anaerobic fermentation provides suitable temperature conditions.
6, in anaerobic fermentation tank, adopt the mode of biogas inner circulating aerating, make the activated sludge in anaerobic reaction district keep fluidized bed state, waste water fully contacts with activated sludge, and anaerobic reaction efficiency improves; Save the energy resource consumption needed for extra aeration or stirring operation; Replace stirring operation with aeration, be conducive to extruding the precipitation of silt in liquid, prevent settling zone silt to the interference of anaerobic reaction.
7, the present invention can to percolate, liquid extruded by rubbish, foul smell effectively processes, and can to process after solid refuse carry out sorting, reach resource reclaim recycling object, significantly improve garbage treatment efficiency.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic diagram of refuse disposal system of the present invention;
Fig. 2 is the structural representation of Ventilating grid tray;
Fig. 3 is the structural representation of anaerobic fermentation tank;
Fig. 4 is the structural representation of diversion column in Fig. 3;
Fig. 5 is the schematic flow sheet of waste disposal method of the present invention.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, refuse disposal system of the present invention, comprises refuse breaking pressurizing unit 20, garbage drying device, odor removal, filtrate treating apparatus and sieving garbage device.Moisture in rubbish is reduced by garbage drying device, percolate is produced when rubbish storage and garbage drying, carry out fragmentation and extrusion process and produce rubbish extruding liquid by refuse breaking pressurizing unit 20 pairs of rubbish, by filtrate treating apparatus to percolate with extrude liquid and carry out anaerobic fermentation, nitrated/denitrification and film process.The foul smell produced during odor removal disposal of refuse process.Sieving garbage device isolates the combustible component in mummification rubbish, inorganic dregs and discarded metal.
Garbage drying device comprises garbage drying district 3, removable cover plate 2 is provided with above garbage drying district 3, removable cover plate 2 is connected with motor 4, material-hent claw 1 is provided with above removable cover plate 2, be provided with ventilation separation layer 6, ventilation airduct 9, screen 7 bottom garbage drying district 3, screen 7 is positioned at the bottom, and ventilation airduct 9 is between screen 7 and ventilation separation layer 6, be provided with the percolate guiding gutter 8 that middle low both sides are high below screen 7, the middle part of percolate guiding gutter 8 is provided with the groove 10 be obliquely installed.Percolate flows in percolate collecting pit 18 through percolate guiding gutter 8, and mummification district 3 arranges the blower fan 5 be connected with ventilation airduct 9 outward.Arrange air exhauster outside mummification district factory building, the foul smell that mummification district produces by air exhauster sends into odor removal, and odor removal is connected with aiutage.
Further, as shown in Figure 2, the middle part on the floor below garbage drying district 3 is provided with polylith screen 7, and screen 7 is provided with intensive gate hole, oozes drop for percolate.
Filtrate treating apparatus comprises leachate collection pond 18, first screw pump 12, pretreatment pool 13, second screw pump 17, heater 14, anaerobic fermentation tank 15.Leachate collection pond 18, first screw pump 12, pretreatment pool 13, second screw pump 17 are connected successively with heater 14.Water diversion tank 11 is provided with between leachate collection pond 18 and the first screw pump 12.Nitrated/denitrification device 27 is also connected with ultra-filtration membrane device 29, nano filter membrance device 30, reverse osmosis membrane apparatus 31 and clear water reserviors 33 successively.Ultra-filtration membrane device 29, nano filter membrance device 30 are connected with concentrated liquid pool 32 with reverse osmosis membrane apparatus 31.Nitrated/between denitrification device 27 and ultra-filtration membrane device 29, to be provided with filter 28.
Further, under the liquid level that the water inlet pipe of water diversion tank 11 stretches in leachate collection pond 18, the outlet pipe of water diversion tank 11 is connected with the import of the first screw pump 12.The outlet of the first screw pump 12 is connected with pretreatment pool 13 by Y-piece road filter 16.Percolate in leachate collection pond 18 is under the first screw pump 12 draws, ground water diversion tank 11 is drawn to pipeline, in water diversion tank 11, the impurity such as the silt in percolate will precipitate in a large number, and supernatant liquid is then delivered to follow-up sewage disposal system by the first screw pump 12 through Y-piece road filter 16.Owing to have employed water diversion tank 11 and Y-piece road filter 16, the impurity such as the silt in primary percolate will be filtered removal in a large number.And the first screw pump 12 stability of flow used, expose on ground, maintenance, attended operation are conveniently.
Filtrate treating apparatus also comprises screw pump 24 and centrifuge 26.The below of refuse breaking pressurizing unit 20 is provided with extrudes liquid collecting pit 22, and the exit of squeezing device for solid waste 20 is provided with garbage conveying belt 21.The liquid of extruding extruded in liquid collecting pit 22 is delivered in pretreatment pool 13 by screw pump 24.Extrude between liquid collecting pit 22 and screw pump 24 and be provided with water diversion tank 23, between screw pump 24 and pretreatment pool 13, be provided with Y-piece road filter 25.Centrifuge 26 connects nitrated/denitrification device 27 and anaerobic fermentation tank 15.Refuse breaking pressurizing unit 20 is also connected with rubbish flusher 19, and rubbish flusher 20 is connected with percolate collecting pit 18 with the outlet conduit of centrifuge 26.In rubbish extrusion process, rubbish flusher 19 extracts the lower waste water flushing crude waste of solid impurity content from the outlet conduit of centrifuge 26 and percolate collecting pit 18, is washed out by the impurity such as the silt in crude waste.
Further, as Fig. 3, shown in Fig. 4, the bottom of anaerobic fermentation tank 15 is sedimentation basin 1504, the top of sedimentation basin 1504 is followed successively by buffering area 1506 and anaerobic reaction district 1507, diversion column 1505 is provided with between sedimentation basin 1504 and buffering area 1506, diversion column 1505 is suspended in the middle part of fermentation tank 15 by the support bar 1501 be fixed on inwall, fermentation tank 15 is provided with water inlet, water inlet is arranged on the position relative with diversion column 1505, the bottom in anaerobic reaction district 1507 is provided with aerator 1502, the top of fermentation tank 15 is provided with overflow launder 1509, delivery port and venthole 1510, venthole 1510 is also connected with collection chamber 1513, and collection chamber 1513 is provided with the first arm 1511 and the second arm 1512, first arm 1511 is connected with aerator 1502.
Further, the first arm 1511 is provided with frequency conversion fan 1508, can regulate aeration speed.
Further, the first arm 1511 or the second arm 1512 are provided with gas flowmeter.
Further, the bottom of sedimentation basin 1504 is provided with discharge pipeline 1503, and the bottom of sedimentation basin 1504 is provided with manhole, is convenient to carry out spoil disposal dredging.
Further, anaerobic reaction district 1507 is provided with oxidation-reduction potential electrode, temp probe and pressure probe.Oxidation-reduction electrode is for testing pH value and current potential.
Further, be respectively equipped with a visor at overflow launder 1509 top of anaerobic fermentation tank 15, collection chamber 1513, the top of anaerobic fermentation tank 15, middle part, bottom are provided with some thief holes.
Present invention also offers a kind of waste disposal method utilizing above-mentioned refuse disposal system, as shown in Figure 5, comprise the following steps:
S1, reception store rubbish, collect percolate;
S2, utilize refuse breaking pressurizing unit 20 pairs of rubbish to carry out primary fragmentation and extruding, collect rubbish and extrude liquid;
S3, to percolate with extrude liquid and carry out anaerobic fermentation, nitrated/denitrification and film process;
S4, utilize garbage drying device to carry out biological dewatered to rubbish, utilize odor removal process foul smell;
S5, second-time breakage is carried out to rubbish, utilize sieving garbage device to isolate the combustible component in mummification rubbish, inorganic dregs and discarded metal.
Above-mentioned steps S3 comprises further:
S31, percolate promote and conveying; By the first screw pump 12, the percolate in leachate collection pond 18 is delivered to pretreatment pool 13 and carries out pretreatment, heater 14 will be sent into through pretreated percolate by the second screw pump 17;
S32, extrude liquid promote with filter; Under the traction of screw pump 24 on the ground, liquid of extruding in collecting pit 22 is drawn to ground water diversion tank 23 by inserting subsurface pipeline, in water diversion tank 23, contamination precipitation in percolate, supernatant liquid, then by screw pump 24 sucking-off, delivers to pretreatment pool 13 after Y-piece road filter 25 filters;
S33, anaerobic fermentation; Filtrate flow in pretreatment pool 13, to heater 14, while adding heated effluent, allows incrustation ion such as Ca in waste liquid
2+, Mg
2+fouling on heating surface bank; Be heated to the filtrate after 30-36 DEG C, enter anaerobic fermentation tank 15 and anaerobic reaction occurs, the biogas of generation delivers to methane utilizing system, and the waste heat that methane utilizing system produces is as the thermal source of heating calcium-removing device; Build deliming platform, remove the scale forming matter on heating surface bank.
After leachate enters anaerobic fermentation tank 15 from inlet channel, under the effect of diversion column 1505, flow direction is rapidly to lower change, and the solid impurity in filtrate, also with water (flow) direction, is shifted to rapidly at the bottom of pond, precipitates at the bottom of pond, and upper strata forms clear liquid.The solid impurity of precipitation is discharged by the spoil disposal pipeline 1503 bottom anaerobic fermentation tank 15.Remove the filtrate of silt to rise gradually, contact at bacterial classifications such as anaerobic reaction district 1507 and activated sludge, generation anaerobic reaction.The biogas that anaerobic reaction produces rises to reactor head, drains into collection chamber 1513, in order to later use, such as, burn, generate electricity from the venthole 1510 of reactor.Liquid after anaerobic reaction flows out from the overflow launder 1509 at anaerobic fermentation tank 15 top.Anaerobic reaction occurs in the process that waste water contacts with mud granule, for forming mud fluid bed reactiveness in anaerobic reaction district 1507, part biogas in collection chamber 1513 is passed into from the aerator 1502 bottom anaerobic reaction district 1507 in the mode of aeration by the first arm 1511, form biogas Inner eycle, the microorganisms such as the waste water in stirring anaerobic reaction district 1507 and activated sludge, make it fully contact, and then improve anaerobic reaction efficiency.Part biogas in collection chamber 1513 is utilized by the second arm 1512.The height of this anaerobic fermentation tank 15 is greater than 2:1 with diameter ratio, and to make extruding liquid, the time of staying is greater than 20 days in the reactor.
S34, nitrated/denitrification and film process; Exudate after anaerobic fermentation, after centrifuge 26 centrifugation, enter nitrated/denitrification device 27, organic and inorganic nitride in removing waste liquid, the waste liquid of discharging from nitrated/denitrification device 27 is after blue formula filter or bag filter filter, enter ultrafiltration/reverse osmosis membrane system, heavy metal in waste liquid, bacterium, virus, colloid, iron rust, suspension, silt, larger molecular organics are retained filtration, the clear liquid after purification is sent into clear water reserviors 33 qualified discharge or is recycled.Clear water reserviors 33 be exactly percolate dispose up to standard after water containing pool; Concentrated liquid pool 32 is residue concentrates that membranous system disposes percolate, and this liquid sends into cement kiln incineration disposal.
Garbage drying process in above-mentioned steps S4 is: by rubbish after fragmentation squeezing, be transferred to garbage drying district 3 by material-hent claw 1, starter motor 4, close removable cover plate 2 above mummification district 3, close mummification district 3, allow rubbish keep 2-3 days under little air quantity or stuffy condition; The waste liquid of garbage filter, by the grid of screen 7, flows into the percolate guiding gutter 8 under mummification district 3, flows into leachate collection pond 18 by this guiding gutter 8; After 2-3 days nature temperature raising periods, open the blower fan 5 be connected with the airduct 9 that ventilates, air blast in mummification district 3, and regulate blower fan 5 air quantity, promote the quick growth of aerobic microbiological in junk-heap body, and then old process is carried out to the labile organic compound in house refuse, its moisture is disengaged.
House refuse is transported to after precrushing and extruding (first time is broken) stacks into rubbish biological mummification district, rubbish is sealed in house refuse laydown area by mobile removable cover plate 2, open blower fan 5, regulate the air quantity of blower fan 5 according to the required airflow in different mummification period, the waste gas that mummification produces is discharged to exhaust treatment system through gas sampling pipeline; The percolate that in drying process, house refuse produces is collected in external leachate collection pond through Turbogrid plates 7 and percolate guiding gutter 8, then drains into percolate joint disposal system by percolate elevator system.By biological and physics drying process, can by the moisture of house refuse below 45 ~ 60% mummification to 30%, also can monitor the temperature of waste gas, humidity and CO content, by Monitoring Data, regulate the air quantity of air blast, can control effectively to drying process, promote the quick growth of microorganism in junk-heap body, namely utilize microorganism aerobic the principle of fermentation to carry out old process to the labile organic compound in house refuse, its moisture is disengaged, improve combustible component ratio; By ulking thickness and the fermentation time of conservative control waste layer, utilize the heat fermenting and produce, the temperature of piling up rubbish is made to reach the preference temperature of 50 ~ 70 DEG C, and in conjunction with the adjustment of mummification storehouse humidity, Flow and heat flux, realize, without the low energy consumption under external heat source condition, efficient mummification, its calorific value being brought up to about 2500kcal/kg by 500 ~ 750kcal/kg.
In above-mentioned steps S5, after twice deironing operation is carried out to rubbish after mummification, carry out second time fragmentation, then experience aidr bells blast system and deferrization process, isolate the inorganic dregs of major part in mummification rubbish and whole discarded metal.After sorting, mummification rubbish is through rotary screen, rubbish is classified as size <60mm component and >60mm component; To being less than 60mm component, utilize pneumatic separating principle, by the adjustment of wind speed, wind direction, the lightweight combustible component making size be less than 60mm is separated with heavy component (inorganic dregs); To the component being greater than 60mm, utilize inertia grading principle, the lightweight combustible component making size be greater than 60mm is separated with heavy masonry components; For the lightweight combustible component being greater than 60mm, circulation enters disintegrating machine, within its size is down to 60mm.Whole sorting crushing process achieves the efficiency crushing to house refuse, and being effectively separated of lightweight combustible component and heavy inorganic component.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (8)
1. a refuse disposal system, is characterized in that, comprises refuse breaking pressurizing unit, garbage drying device, odor removal, filtrate treating apparatus and sieving garbage device;
Reduce moisture in rubbish by garbage drying device, when rubbish storage and garbage drying, produce percolate;
By refuse breaking pressurizing unit, fragmentation and extrusion process are carried out to rubbish, produce rubbish and extrude liquid;
By described filtrate treating apparatus to described percolate with extrude liquid and carry out anaerobic fermentation, nitrated/denitrification and film process;
The foul smell produced during described odor removal disposal of refuse process;
Described sieving garbage device isolates the combustible component in mummification rubbish, inorganic dregs and discarded metal.
2. refuse disposal system according to claim 1, it is characterized in that, described garbage drying device comprises garbage drying district, removable cover plate is provided with above described garbage drying district, described removable cover plate is connected with motor, material-hent claw is provided with above described removable cover plate, ventilation separation layer is provided with bottom described garbage drying district, ventilation airduct, screen, described screen is positioned at the bottom, described ventilation airduct is between screen and ventilation separation layer, the percolate guiding gutter that middle low both sides are high is provided with below described screen, percolate flows in external percolate collecting pit through described percolate guiding gutter, the blower fan be connected with ventilation airduct is set outside mummification district.
3. refuse disposal system according to claim 1, it is characterized in that, described filtrate treating apparatus comprises leachate collection pond, first screw pump, pretreatment pool, second screw pump, heater, anaerobic fermentation tank, nitrated/denitrification device, ultra-filtration membrane device, nano filter membrance device, reverse osmosis membrane apparatus, clear water reserviors and concentrated liquid pool, described leachate collection pond, first screw pump, pretreatment pool, second screw pump is connected successively with heater, water diversion tank is provided with between described leachate collection pond and the first screw pump, described nitrated/denitrification device also successively with ultra-filtration membrane device, nano filter membrance device, reverse osmosis membrane apparatus is connected with clear water reserviors, described ultra-filtration membrane device, nano filter membrance device is connected with described concentrated liquid pool with reverse osmosis membrane apparatus.
4. refuse disposal system according to claim 3, is characterized in that, described filtrate treating apparatus also comprises screw pump and centrifuge; The below of described refuse breaking pressurizing unit is provided with extrudes liquid collecting pit, and the described liquid of extruding extruded in liquid collecting pit is delivered in described pretreatment pool by described screw pump; Described extruding between liquid collecting pit and screw pump is provided with water diversion tank, is provided with Y-piece road filter between described screw pump and described pretreatment pool; Described centrifuge connect described nitrated/denitrification device and anaerobic fermentation tank; Described refuse breaking pressurizing unit is also connected with rubbish flusher, and described rubbish flusher is connected with percolate collecting pit with described centrifuge outlet conduit.
5. utilize a waste disposal method for the refuse disposal system in claim 1-4, it is characterized in that, comprise the following steps:
S1, reception store rubbish, collect percolate;
S2, utilize refuse breaking pressurizing unit to carry out primary fragmentation and extruding to rubbish, collect rubbish and extrude liquid;
S3, to percolate with extrude liquid and carry out anaerobic fermentation, nitrated/denitrification and film process;
S4, utilize garbage drying device to carry out biological dewatered to rubbish, utilize odor removal process foul smell;
S5, second-time breakage is carried out to rubbish, utilize sieving garbage device to isolate the combustible component in mummification rubbish, inorganic dregs and discarded metal.
6. waste disposal method according to claim 5, is characterized in that, described step S3 comprises further:
S31, percolate promote and conveying; By the first screw pump, the percolate in leachate collection pond is delivered to pretreatment pool and carries out pretreatment, heater will be sent into through pretreated percolate by the second screw pump;
S32, extrude liquid promote with filter; Under the traction of screw pump on the ground, liquid of extruding in collecting pit is drawn to ground water diversion tank by inserting subsurface pipeline, in water diversion tank, extrudes the contamination precipitation in liquid, supernatant liquid, then by screw pump sucking-off, delivers to pretreatment pool after Y-piece road metre filter;
S33, anaerobic fermentation; Filtrate flow in pretreatment pool, to heater, while adding heated effluent, allows incrustation ion fouling on heating surface bank in waste liquid; Be heated to the filtrate after 30-36 DEG C, enter anaerobic fermentation tank generation anaerobic reaction, the biogas of generation delivers to methane utilizing system, and the waste heat that methane utilizing system produces is as the thermal source of heating calcium-removing device;
S34, nitrated/denitrification and film process; Exudate after anaerobic fermentation, after centrifuge is separated, enter nitrated/denitrification device, organic and inorganic nitride in removing waste liquid, the waste liquid of discharging from nitrated/denitrification device is after blue formula filter or bag filter filter, enter ultrafiltration/reverse osmosis membrane system, heavy metal in waste liquid, bacterium, virus, colloid, iron rust, suspension, silt, larger molecular organics are retained filtration, the clear liquid after purification is sent into clear water reserviors qualified discharge or is recycled.
7. waste disposal method according to claim 5, it is characterized in that, garbage drying process in described step S4 is: by rubbish after fragmentation squeezing, garbage drying district is transferred to by material-hent claw, starter motor, close removable cover plate above mummification district, close mummification district, allow rubbish keep 2-3 days under little air quantity or stuffy condition; The waste liquid of garbage filter, by the grid of screen, flows into the percolate guiding gutter under mummification district, flows into leachate collection pond by this guiding gutter; After 2-3 days nature temperature raising periods, open the blower fan be connected with the airduct that ventilates, air blast in mummification district, and regulate blower air quantity, promote the quick growth of aerobic microbiological in junk-heap body, and then old process is carried out to the labile organic compound in house refuse, its moisture is disengaged.
8. waste disposal method according to claim 5, is characterized in that, in described step S5, after twice deironing operation is carried out to rubbish after mummification, carry out second time broken, then experience aidr bells blast system and deferrization process, isolate the inorganic dregs of major part in mummification rubbish and whole discarded metal; After sorting, mummification rubbish is through rotary screen, rubbish is classified as size <60mm component and >60mm component; To being less than 60mm component, utilize pneumatic separating principle, by the adjustment of wind speed, wind direction, the lightweight combustible component making size be less than 60mm is separated with the inorganic dregs of heavy; To the component being greater than 60mm, utilize inertia grading principle, the lightweight combustible component making size be greater than 60mm is separated with heavy masonry components; For the lightweight combustible component being greater than 60mm, circulation enters disintegrating machine, within its size is down to 60mm.
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