CN204107978U - A kind of refuse disposal system - Google Patents

Abstract

The utility model relates to a garbage treatment system, which comprises a garbage crushing and squeezing device, a garbage drying device, a deodorizing device, a filtrate treatment device and a garbage screening device; Leachate is produced during drying; the garbage is crushed and squeezed through the garbage crushing and squeezing device to produce garbage extruded liquid; the leachate and extruded liquid are subjected to anaerobic fermentation, nitrification/ Denitrification and membrane treatment; the deodorization device treats the odor generated during garbage disposal; the garbage screening device separates combustible components, inorganic slag and waste metal in the dry garbage. The utility model can effectively process garbage leachate, garbage extruded liquid and odor, and can sort the treated solid garbage, so as to achieve the purpose of resource recovery and reuse, and significantly improve the efficiency of garbage treatment.

Description

a garbage disposal system

technical field

The utility model relates to a garbage treatment system.

Background technique

The treatment and utilization of municipal waste "harmless, reduced, and resourceful" is a worldwide issue. At present, the centralized treatment methods of urban and rural municipal waste in my country mainly include landfill, composting, and incineration. The landfill method occupies a large area and has a low degree of waste reduction. It requires anti-seepage treatment, and a biogas recovery and leachate treatment plant must be built, which is likely to pollute groundwater and surrounding air. The composting method is suitable for treating waste containing a lot of perishable organic matter, and can realize the comprehensive utilization of some resources, but the quality of composting is not easy to control, and the harmful components often exceed the standard. Waste incineration power generation is developing very rapidly in my country, but the investment is large, the operating cost is high, and the fly ash containing dioxin and heavy metals is very harmful and difficult to deal with. Toxins are still difficult to control and monitor. In order to fully reflect the principle of "reduction, recycling, and harmlessness", people have introduced various comprehensive municipal waste treatment processes. In the existing waste treatment process, there are the following problems:

In order to reduce the moisture in the garbage, the primary municipal garbage is crushed and squeezed before the garbage is dried, which will help to further improve the efficiency of the garbage drying. However, the rubbish extruded liquid produced by squeezing the rubbish is a kind of high-concentration organic wastewater with complex components. After testing, its solid impurity content is about 14%, and its chemical oxygen demand (COD) reaches 110000-120000mg/L. For this characteristic of garbage extruded liquid, it is necessary to design the extruded liquid disposal process in order to reduce the solid impurities and COD content in the extruded liquid, so that the treated extruded liquid can meet the requirements of relevant national standards and discharge up to the standard.

In the existing waste treatment process, the primary municipal waste needs to be dried after being crushed and squeezed. Most of the existing drying treatment processes are air drying and heating drying. Garbage at the bottom of the drying area is easy to accumulate and harden, resulting in the inability of the landfill leachate to flow out, which reduces the efficiency of waste drying; landfill leachate will accumulate at the bottom of the drying area , and ferment to produce flammable gas, causing safety hazards.

Leachate is produced while the garbage is being dried. After testing, its solid impurity content is less than 1%, and its chemical oxygen demand (COD) concentration is extremely high in the range of 50,000-75,000 mg/L. Usually, the leachate generated during the garbage drying process is collected in the sump, and sent to the sewage treatment system by the submersible pump at the bottom of the leachate collection pool, and discharged after the leachate treatment reaches the standard. The sediment of the landfill leachate is easy to block the submersible pump. The submersible pump is placed at the bottom of the leachate collection tank, which is easily corroded by the leachate and difficult to repair. At the same time, the flow rate of the submersible pump is unstable, and it is easy to bring in impurities, which will affect the subsequent processing procedures. Due to the above-mentioned problems of the existing waste treatment process, the waste treatment efficiency is low, the treated extrudate and leachate are not up to standard, and the maintenance rate of the devices in the system is high.

Contents of the invention

The technical problem to be solved by the utility model is to provide a garbage disposal system that improves the efficiency of garbage disposal.

The technical solution adopted by the utility model to solve the technical problems is: to construct a garbage treatment system, including a garbage crushing and squeezing device, a garbage drying device, a deodorizing device, a filtrate processing device and a garbage screening device;

The moisture in the garbage is reduced through the garbage drying device, and leachate is generated during garbage storage and garbage drying;

The garbage is crushed and squeezed by the garbage crushing and squeezing device to produce garbage extrusion liquid;

Perform anaerobic fermentation, nitrification/denitrification and membrane treatment on the leachate and extruded liquid through the filtrate treatment device;

The odor generated during the disposal of garbage by the deodorizing device;

The garbage screening device separates combustible components, inorganic slag and waste metal in the dried garbage.

In the above solution, the garbage drying device includes a garbage drying area, a movable cover is provided above the garbage drying area, the movable cover is connected to a motor, and a gripper is arranged above the movable cover. Material claw, the bottom of the garbage drying area is provided with a ventilation isolation layer, a ventilation duct, and a grid plate, the grid plate is located at the bottom, the ventilation duct is located between the grid plate and the ventilation isolation layer, and the grid plate There is a leachate diversion tank with low middle and high sides at the bottom, through which the leachate leachate flows into the landfill leachate collection tank, and a fan connected to the ventilation duct is arranged outside the drying area.

In the above scheme, the filtrate treatment device includes a leachate collection tank, a first screw pump, a pretreatment tank, a second screw pump, a heater, an anaerobic fermentation tank, a nitrification/denitrification device, an ultrafiltration membrane device, a nanofiltration Membrane device, reverse osmosis membrane device, clear water tank and concentrated liquid tank, the leachate collection tank, the first screw pump, pretreatment tank, second screw pump and heater are connected in sequence, and the leachate collection tank is connected with the first A water diversion tank is arranged between the screw pumps, and the nitrification/denitrification device is also connected with an ultrafiltration membrane device, a nanofiltration membrane device, a reverse osmosis membrane device and a clear water tank in sequence, and the ultrafiltration membrane device, nanofiltration membrane device and The reverse osmosis membrane device is connected with the concentrate pool.

In the above scheme, the filtrate treatment device also includes a screw pump and a centrifuge; an extruded liquid collection pool is arranged below the garbage crushing and extruding device, and the extruded liquid in the extruded liquid collection pool is extruded by the screw pump. The liquid is transported into the pretreatment tank; a water diversion tank is provided between the extruded liquid collection tank and the screw pump, and a Y-shaped pipeline filter is provided between the screw pump and the pretreatment tank; the centrifuge is connected to The nitrification/denitrification device and the anaerobic fermentation tank; the rubbish crushing and extruding device is also connected to the rubbish flushing device, and the rubbish flushing device is connected to the centrifuge outlet pipe and the rubbish leachate collection tank.

The utility model also provides a garbage disposal method using the above garbage disposal system, which is characterized in that it includes the following steps:

S1. Receive and store garbage, collect garbage leachate;

S2. Use the garbage crushing and squeezing device to crush and squeeze the garbage once, and collect the garbage extrusion liquid;

S3. Perform anaerobic fermentation, nitrification/denitrification and membrane treatment on landfill leachate and extruded liquid;

S4. Use the garbage drying device to biologically dry the garbage, and use the deodorization device to treat the odor;

S5. Perform secondary crushing on the garbage, and use the garbage screening device to separate the combustible components, inorganic slag and waste metal in the dried garbage.

In the above solution, the step S3 further includes:

S31. Elevating and transporting the leachate; transporting the leachate in the leachate collection tank to the pretreatment tank through the first screw pump for pretreatment, and sending the pretreated leachate into the heater through the second screw pump;

S32. Elevation and filtration of extruded liquid; under the traction of the screw pump on the ground, the extruded liquid in the collection pool is sucked into the water diversion tank on the ground by the pipe inserted under the liquid surface, and in the diversion tank, the extruded liquid The impurities are precipitated, while the upper liquid is sucked out by the screw pump, filtered through the Y-type pipeline filter, and then sent to the pretreatment tank;

S33, anaerobic fermentation; the filtrate in the pretreatment tank flows to the heater, and while heating the waste liquid, the scale-forming ions in the waste liquid are allowed to scale on the heat transfer tube bundle; the filtrate after heating to 30-36°C, Entering the anaerobic fermentation tank for anaerobic reaction, the generated biogas is sent to the biogas utilization system, and the waste heat generated by the biogas utilization system is used as the heat source for heating the decalcification device;

S34. Nitrification/denitrification and membrane treatment; the effluent after anaerobic fermentation is centrifuged and separated by a centrifuge, and enters the nitrification/denitrification device to remove organic and inorganic nitrogen compounds in the waste liquid, and is discharged from the nitrification/denitrification device After being filtered by a blue filter or a bag filter, the waste liquid enters the ultrafiltration/reverse osmosis membrane system to retain and filter heavy metals, bacteria, viruses, colloids, rust, suspended solids, sediment, and macromolecular organic matter in the waste liquid , the purified supernatant is sent to the clear water pool for discharge or recycling.

In the above solution, the garbage drying process in step S4 is as follows: After the garbage is crushed and squeezed, it is transferred to the garbage drying area through the grasping claw, the motor is started, the movable cover above the drying area is closed, and the drying area is closed. area, let the garbage keep for 2-3 days under the condition of small air volume or no ventilation; the waste liquid infiltrated by the garbage, through the grille of the grid plate, flows into the leachate diversion tank under the drying area, and flows into the leachate diversion tank through the diversion tank Leachate collection tank; after 2-3 days of natural heating period, turn on the fan connected to the ventilation duct to blow air into the drying area, and adjust the air volume of the blower to promote the rapid growth of aerobic microorganisms in the garbage dump, and then Decompose the degradable organic matter in domestic waste to release its water.

In the above scheme, in the step S5, after performing two iron removal operations on the dried garbage, the second crushing is carried out, and then undergoes a winnowing system and iron removal process to separate most of the inorganic components in the dried garbage. Slag and all waste metals; after sorting, the dry garbage is passed through a drum screen, and the garbage is classified into components with a size of <60mm and >60mm; for components smaller than 60mm, the principle of wind separation is used to adjust the wind speed and direction , to separate light combustible components with a size of less than 60mm from heavy inorganic slag; for components larger than 60mm, use the principle of inertial separation to separate light combustible components with a size larger than 60mm from heavy masonry components ; For light combustible components larger than 60mm, circulate into the crusher to reduce their size to less than 60mm.

Implementing the garbage disposal system of the present utility model has the following beneficial effects:

1. Equipped with a garbage flushing device on the garbage extrusion device, the waste water with low solid impurities is used to wash the raw garbage, and the inorganic impurities in the garbage are washed out, which is beneficial to the sorting of the subsequent garbage and the improvement of the calorific value.

2. The method of combining the natural fermentation of garbage with heating and aerobic fermentation is adopted to improve the efficiency of garbage drying. The use of blast drying can prevent the accumulation of garbage at the bottom of the drying area, and the wind circulation is smoother, which is conducive to aerobic fermentation, so the drying efficiency is higher. The landfill leachate immediately flows into the external leachate collection tank through the leachate diversion tank, which avoids the potential safety hazard of leachate accumulating and fermenting in the drying area and producing flammable gas.

3. Replace the submersible pump at the bottom of the filtrate pool with a screw pump exposed on the ground to ensure stable flow during waste liquid transportation, easy maintenance and repair, and solve the problem that the submersible pump is easy to be blocked and corroded.

4. Build a decalcification platform to remove the main scaling ion Ca ²⁺ in the landfill leachate by scaling while heating the waste liquid, protecting the subsequent leachate treatment equipment.

5. The biogas generated by anaerobic fermentation is recycled and used in equipment such as boilers or generators, and in the process of biogas utilization. The generated waste heat is used as the heat source of the heater to provide suitable temperature conditions for anaerobic fermentation.

6. In the anaerobic fermentation tank, the biogas internal circulation aeration method is adopted to keep the activated sludge in the anaerobic reaction zone in a fluidized bed state, the wastewater and the activated sludge are fully contacted, and the anaerobic reaction efficiency is improved; saving additional The energy consumption required for aeration or stirring operation; replacing the stirring operation with aeration is beneficial to the sedimentation of the extruded liquid and prevents the interference of the sediment in the sedimentation area on the anaerobic reaction.

7. The utility model can effectively treat garbage leachate, garbage extruded liquid, and odor, and can sort the treated solid garbage, so as to achieve the purpose of resource recovery and reuse, and significantly improve the efficiency of garbage treatment.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the schematic diagram of the utility model garbage treatment system;

Fig. 2 is a structural schematic diagram of a ventilation grid;

Fig. 3 is the structural representation of anaerobic fermentation tank;

Fig. 4 is a schematic structural view of the diversion column in Fig. 3;

Fig. 5 is a schematic flow chart of the waste treatment method of the present invention.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is described in detail with reference to the accompanying drawings.

As shown in Figure 1, the garbage treatment system of the present invention includes a garbage crushing and squeezing device 20, a garbage drying device, a deodorizing device, a filtrate processing device and a garbage screening device. The moisture in the garbage is reduced through the garbage drying device, and leachate is generated during garbage storage and garbage drying. The garbage is crushed and squeezed through the garbage crushing and squeezing device 20 to generate garbage extrudate, and the leachate is treated by the filtrate treatment device. Anaerobic fermentation, nitrification/denitrification and membrane treatment are carried out with the extruded liquid. The deodorizing device treats the odor generated during garbage disposal. The garbage screening device separates the combustible components, inorganic slag and waste metal in the dry garbage.

The garbage drying device includes a garbage drying area 3, a movable cover 2 is arranged above the garbage drying area 3, the movable cover 2 is connected with a motor 4, and a grasping claw 1 is arranged above the movable cover 2, and the garbage drying The bottom of the chemical zone 3 is provided with a ventilation isolation layer 6, a ventilation duct 9, and a grid plate 7, the grid plate 7 is located at the bottom, the ventilation duct 9 is located between the grid plate 7 and the ventilation isolation layer 6, and an intermediate spacer is provided below the grid plate 7. The leachate diversion tank 8 is low and the sides are high, and the middle part of the leachate diversion tank 8 is provided with a groove 10 arranged obliquely. The landfill leachate flows into the landfill leachate collection tank 18 through the leachate diversion groove 8 , and the fan 5 connected to the ventilation duct 9 is arranged outside the drying area 3 . An exhaust fan is installed outside the plant in the drying area, and the exhaust fan sends the odor generated in the drying area to the deodorization device, which is connected to the exhaust pipe.

Further, as shown in FIG. 2 , a plurality of grid plates 7 are provided in the middle of the floor below the garbage drying area 3 , and dense grid holes are provided on the grid plates 7 for seepage of landfill leachate.

The filtrate treatment device includes a leachate collection tank 18 , a first screw pump 12 , a pretreatment tank 13 , a second screw pump 17 , a heater 14 , and an anaerobic fermentation tank 15 . The leachate collection tank 18, the first screw pump 12, the pretreatment tank 13, the second screw pump 17 and the heater 14 are connected in sequence. A water diversion tank 11 is provided between the leachate collection tank 18 and the first screw pump 12 . The nitrification/denitrification device 27 is also connected with an ultrafiltration membrane device 29 , a nanofiltration membrane device 30 , a reverse osmosis membrane device 31 and a clean water tank 33 in sequence. The ultrafiltration membrane device 29 , the nanofiltration membrane device 30 and the reverse osmosis membrane device 31 are connected to the concentrated solution pool 32 . A filter 28 is provided between the nitrification/denitrification device 27 and the ultrafiltration membrane device 29 .

Further, the water inlet pipe of the water diversion tank 11 extends below the liquid level in the leachate collection tank 18 , and the water outlet pipe of the water diversion tank 11 is connected with the inlet of the first screw pump 12 . The outlet of the first screw pump 12 is connected with the pretreatment tank 13 through a Y-shaped pipeline filter 16 . The leachate in the leachate collection tank 18 is drawn by the first screw pump 12, and is sucked to the water diversion tank 11 on the ground along with the pipeline. The liquid is sent to the subsequent sewage treatment system by the first screw pump 12 through the Y-shaped pipeline filter 16 . Due to the adoption of the water diversion tank 11 and the Y-shaped pipeline filter 16, impurities such as silt in the primary leachate will be removed by a large amount of filtration. Moreover, the first screw pump 12 used has a stable flow rate, is exposed on the ground, and is convenient for inspection and maintenance.

The filtrate treatment device also includes a screw pump 24 and a centrifuge 26 . Below the rubbish crushing and extruding device 20 is provided with an extruded liquid collection pool 22 , and at the outlet of the rubbish extruding device 20 is provided with a rubbish conveying belt 21 . The screw pump 24 transports the extruded liquid in the extruded liquid collection tank 22 to the pretreatment tank 13 . A water diversion tank 23 is provided between the extrudate collection tank 22 and the screw pump 24 , and a Y-shaped pipeline filter 25 is provided between the screw pump 24 and the pretreatment tank 13 . The centrifuge 26 is connected with the nitrification/denitrification device 27 and the anaerobic fermentation tank 15 . The rubbish crushing and extruding device 20 is also connected with the rubbish flushing device 19 , and the rubbish flushing device 20 is connected with the outlet pipe of the centrifuge 26 and the rubbish leachate collection tank 18 . During the rubbish squeezing process, the rubbish flushing device 19 extracts waste water with low solid impurity content from the outlet pipe of the centrifuge 26 and the leachate collection tank 18 to flush the raw rubbish, and wash out impurities such as silt in the raw rubbish.

Further, as shown in Figure 3 and Figure 4, the bottom of the anaerobic fermentation tank 15 is a sedimentation tank 1504, and above the sedimentation tank 1504 is a buffer zone 1506 and an anaerobic reaction zone 1507, between the sedimentation tank 1504 and the buffer zone 1506 A diversion column 1505 is provided, and the diversion column 1505 is suspended in the middle of the fermenter 15 through a support rod 1501 fixed on the inner wall. The bottom of the anaerobic reaction zone 1507 is provided with an aeration device 1502, and the upper part of the fermenter 15 is provided with an overflow tank 1509, a water outlet and an air outlet 1510; There are a first branch pipe 1511 and a second branch pipe 1512 , and the first branch pipe 1511 is connected with the aeration device 1502 .

Further, the first branch pipe 1511 is provided with a frequency conversion fan 1508, which can adjust the aeration speed.

Further, a gas flow meter is provided on the first branch pipe 1511 or the second branch pipe 1512 .

Further, a mud discharge pipe 1503 is provided at the bottom of the sedimentation tank 1504, and a manhole is provided at the bottom of the sedimentation tank 1504, which is convenient for dredging mud.

Further, the anaerobic reaction zone 1507 is provided with redox potential electrodes, temperature probes and pressure probes. Redox electrodes are used to test pH and potential.

Further, a sight glass is respectively provided on the upper part of the overflow tank 1509 and the gas collection chamber 1513 of the anaerobic fermentation tank 15 , and several sampling holes are provided on the upper part, the middle part and the bottom part of the anaerobic fermentation tank 15 .

The utility model also provides a garbage disposal method using the above garbage disposal system, as shown in Figure 5, comprising the following steps:

S1. Receive and store garbage, collect garbage leachate;

S2. Use the garbage crushing and squeezing device 20 to crush and squeeze the garbage once, and collect the garbage extrusion liquid;

S3. Perform anaerobic fermentation, nitrification/denitrification and membrane treatment on landfill leachate and extruded liquid;

S4. Use the garbage drying device to biologically dry the garbage, and use the deodorization device to treat the odor;

S5. Perform secondary crushing on the garbage, and use the garbage screening device to separate the combustible components, inorganic slag and waste metal in the dried garbage.

Above-mentioned step S3 further comprises:

S31, leachate lifting and conveying; the leachate in the leachate collection tank 18 is transported to the pretreatment tank 13 by the first screw pump 12 for pretreatment, and the pretreated leachate is sent into the heating tank by the second screw pump 17 device 14;

S32, lifting and filtering the extruded liquid; under the traction of the screw pump 24 on the ground, the extruded liquid in the collection pool 22 is sucked to the water diversion tank 23 on the ground by the pipeline inserted under the liquid surface, and in the diversion tank 23, Impurities in the leachate are precipitated, while the upper liquid is sucked out by the screw pump 24, filtered by the Y-shaped pipeline filter 25, and then sent to the pretreatment tank 13;

S33, anaerobic fermentation; the filtrate in the pretreatment tank 13 flows to the heater 14, and while the waste liquid is heated, scale-forming ions in the waste liquid such as Ca ²⁺ and Mg ²⁺ are scaled on the heat transfer tube bundle; The filtrate heated to 30-36°C enters the anaerobic fermentation tank 15 for anaerobic reaction, and the generated biogas is sent to the biogas utilization system, and the waste heat generated by the biogas utilization system is used as the heat source for heating the decalcification device; a decalcification platform is built to remove Fouling material on heat transfer tube bundles.

After the garbage filtrate enters the anaerobic fermentation tank 15 from the water inlet pipe, under the action of the diversion column 1505, the flow direction changes rapidly downward, and the solid impurities in the filtrate also quickly move to the bottom of the tank along with the direction of water flow, and settle at the bottom of the tank , the supernatant formed. The precipitated solid impurities are discharged through the sludge discharge pipe 1503 at the bottom of the anaerobic fermentation tank 15 . The filtrate from which the sediment has been removed rises gradually, and contacts bacteria such as activated sludge in the anaerobic reaction zone 1507 to undergo an anaerobic reaction. The biogas produced by the anaerobic reaction rises to the top of the reactor, and is discharged from the outlet hole 1510 of the reactor to the gas collection chamber 1513 for subsequent utilization, such as combustion and power generation. The liquid after the anaerobic reaction flows out from the overflow tank 1509 at the top of the anaerobic fermentation tank 15 . Anaerobic reaction occurs in the process of contacting wastewater and sludge particles. In order to form a sludge fluidized bed reaction state in the anaerobic reaction zone 1507, part of the biogas in the gas collection chamber 1513 is aerated through the first branch pipe 1511 from the The aeration device 1502 at the bottom of the anaerobic reaction zone 1507 is connected to form an internal circulation of biogas, stirring the wastewater and activated sludge and other microorganisms in the anaerobic reaction zone 1507 to fully contact them, thereby improving the efficiency of the anaerobic reaction. Part of the biogas in the gas collection chamber 1513 is utilized through the second branch pipe 1512 . The height-to-diameter ratio of the anaerobic fermentation tank 15 is greater than 2:1, so that the residence time of the extruded liquid in the reactor is greater than 20 days.

S34, nitrification/denitrification and membrane treatment; the effluent after anaerobic fermentation, after being centrifuged by centrifuge 26, enters nitrification/denitrification device 27 to remove organic and inorganic nitrogen compounds in the waste liquid, from nitrification/denitrification The waste liquid discharged from the device 27 is filtered by a blue filter or a bag filter, and enters an ultrafiltration/reverse osmosis membrane system to remove heavy metals, bacteria, viruses, colloids, rust, suspended solids, sediment, and macromolecules in the waste liquid. The organic matters are intercepted and filtered, and the purified clear liquid is sent to the clear water pool 33 for discharge or recycling. The clean water pool 33 is the water storage pool after the leachate is treated up to the standard; the concentrate pool 32 is the residue concentrate of the leachate treated by the membrane system, and the liquid is sent to the cement kiln for incineration.

The garbage drying process in the above step S4 is as follows: After the garbage is crushed and squeezed, it is transferred to the garbage drying area 3 through the grasping claw 1, the motor 4 is started, the movable cover 2 above the drying area 3 is closed, and the drying area is closed. Area 3, keep the garbage for 2-3 days under the condition of small air volume or no ventilation; the waste liquid infiltrated by the garbage flows into the leachate diversion tank 8 under the drying area 3 through the grid of the grid plate 7, and passes through the The diversion groove 8 flows into the leachate collection tank 18; after 2-3 days of natural heating period, the fan 5 connected to the ventilation duct 9 is turned on to blow air into the drying area 3, and the air volume of the fan 5 is adjusted to promote the garbage pile. The rapid growth of aerobic microorganisms in the body, and then decompose the degradable organic matter in the domestic waste to release the water.

Household waste is pre-crushed and squeezed (the first crushing) and then transferred to the garbage biological drying area for stacking. The movable cover plate 2 seals the waste in the domestic waste stacking area, and the fan 5 is turned on. Adjust the air volume of the fan 5 according to the required air volume, and the waste gas produced by drying is discharged to the waste gas treatment system through the waste gas collection pipe; In the leachate collection tank, the leachate lifting system is discharged to the leachate comprehensive disposal system. Through the biological and physical drying process, the moisture content of domestic waste can be dried from 45-60% to less than 30%, and the temperature, humidity and CO content of the waste gas can also be monitored. Through the monitoring data, the air volume of the blower can be adjusted, which can Effectively control the drying process and promote the rapid growth of microorganisms in the garbage dump, that is, use the principle of microbial aerobic fermentation to decompose the degradable organic matter in domestic waste, release water, and increase the proportion of combustibles; through Reasonably control the accumulation thickness of the garbage layer and the fermentation time, and use the heat generated by fermentation to make the temperature of the accumulated garbage reach a suitable temperature of 50-70°C. Combined with the adjustment of the humidity, flow field and temperature field of the drying bin, it can achieve no additional waste. Low energy consumption and high-efficiency drying under heat source conditions increase its calorific value from 500-750kcal/kg to about 2500kcal/kg.

In the above step S5, after two iron removal operations are performed on the dried garbage, the second crushing is carried out, and then through the winnowing system and the iron removal process, most of the inorganic slag in the dried garbage is separated and all discarded Metal. After sorting, the dried garbage passes through the drum sieve, and the garbage is classified into components with a size of <60mm and components with a size of >60mm; for components smaller than 60mm, the principle of wind separation is used to adjust the wind speed and direction to make the light particles with a size smaller than 60mm Separation of light combustible components from heavy components (inorganic slag); for components larger than 60mm, use the principle of inertial separation to separate light combustible components larger than 60mm from heavy masonry components; The 60mm light combustible component is circulated into the crusher to reduce its size to less than 60mm. The entire sorting and crushing process realizes the efficient crushing of domestic waste and the effective separation of light combustible components and heavy inorganic components.

Embodiments of the present utility model have been described above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, rather than restrictive. Under the enlightenment of the utility model, personnel can also make many forms without departing from the scope of protection of the purpose of the utility model and claims, and these all belong to the protection of the utility model.

Claims (4)

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.