CN114798663A - Household garbage storage pit and leachate collection method thereof - Google Patents
Household garbage storage pit and leachate collection method thereof Download PDFInfo
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- CN114798663A CN114798663A CN202210433627.0A CN202210433627A CN114798663A CN 114798663 A CN114798663 A CN 114798663A CN 202210433627 A CN202210433627 A CN 202210433627A CN 114798663 A CN114798663 A CN 114798663A
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- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 202
- 238000003860 storage Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000001125 extrusion Methods 0.000 claims abstract description 24
- 230000018044 dehydration Effects 0.000 claims abstract description 15
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 35
- 239000002245 particle Substances 0.000 claims description 22
- 239000000149 chemical water pollutant Substances 0.000 claims description 15
- 239000003651 drinking water Substances 0.000 claims description 15
- 235000020188 drinking water Nutrition 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 14
- 239000010791 domestic waste Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 abstract description 5
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 10
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 10
- 239000002699 waste material Substances 0.000 description 4
- 101150054854 POU1F1 gene Proteins 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F5/00—Gathering or removal of refuse otherwise than by receptacles or vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F9/00—Transferring of refuse between vehicles or containers with intermediate storage or pressing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/14—Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringing; by brushing; by wiping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/04—Garbage
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a household garbage storage pit and a percolate collecting method thereof. The household garbage storage pit comprises a garbage receiving pit, a garbage crushing and dewatering area, a crushed garbage storage pit, a vacuum pump room area and a percolate collecting pool. The collecting method comprises the steps that household garbage is discharged into a garbage receiving pit and is collected into a percolate collecting pool through a slope releasing structure at the bottom; crushing the garbage after water seepage, and then performing extrusion dehydration, and enabling the leachate to enter a leachate collecting tank; after extrusion, garbage is distributed in a broken garbage storage pit, a vacuum pump room area provides negative pressure, and leachate in the garbage flows into a leachate collecting layer at the bottom under the action of the negative pressure and is pumped into a leachate collecting pool after being intensively pumped by a vacuum pump. According to the invention, three-stage collection of leachate is completed by utilizing the functions of gravity seepage, extrusion dehydration and vacuum suction, so that the solid-liquid separation efficiency of garbage can be greatly improved, the water content of the garbage is reduced, the heat value of the garbage is improved, the subsequent treatment difficulty is greatly reduced, and the water content of household garbage can be reduced by 10-45%.
Description
Technical Field
The invention belongs to the field of energy conservation and environmental protection, and particularly relates to a household garbage storage pit and a percolate collecting method thereof.
Background
Domestic garbage in China is mostly collected in a mixed mode, generally presents the characteristics of complex configuration, high moisture content (40% -60%), low calorific value (600-1500 kcal/kg), and has large variation fluctuation with areas, seasons, economic levels and the like. The high water content of the household garbage is not beneficial to the subsequent pretreatment such as screening and winnowing, the incineration heat value of the household garbage is more seriously influenced, the disposal difficulty is increased, and the disposal cost is high. It can be said that high water content has always been a bottleneck that restricts the disposal of garbage. How to effectively discharge the percolate in the storage stage of the domestic garbage, reduce the water content of the percolate and reduce the subsequent disposal difficulty is always a hot problem researched by the researchers in the industry.
In the prior patent, the collection method of the domestic garbage percolate makes use of the fermentation and the gravity to cause the percolate to be passively seeped out, or prevents the percolate from being blocked by improving the drainage grate structure at the bottom or the side wall of the garbage storage pit so as to facilitate the circulation and the drainage of the percolate at the upper part. Practice shows that the separation effect of the landfill leachate is not obvious, and after the garbage is accumulated for a long time, the garbage at the bottom can be deposited and hardened, so that a dialysis channel at the lower layer is blocked, and the leachate in the garbage cannot be effectively discharged.
Disclosure of Invention
The method aims at solving the problems that the water content of domestic garbage is high in China, subsequent pretreatment, incineration and other treatment processes are restricted, the treatment cost is high, the garbage leachate separation effect in the existing patent method is not obvious, and the like. The invention provides a household garbage storage pit and a percolate collecting method thereof, wherein percolate is effectively discharged in time in a garbage storage stage, the water content of the percolate is reduced, the heat value of garbage is improved, the treatment difficulty of subsequent pretreatment, incineration and the like is reduced, the treatment cost is reduced, and the household garbage storage pit and the percolate collecting method are suitable for large-scale industrial popularization and use.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a domestic waste storage pit, domestic waste storage pit is including the rubbish receiving pit that separates each other, broken dehydration district of rubbish, broken back refuse storage pit, vacuum pump house district and filtration liquid collecting pit, the bottom of rubbish receiving pit is equipped with puts the slope structure, the filtration liquid collecting pit is located the bottom of putting the slope structure, the play liquid end and the filtration liquid collecting pit intercommunication in broken dehydration district of rubbish, the discharge end and the broken back refuse storage pit intercommunication in broken dehydration district of rubbish, the bottom in broken back refuse storage pit is equipped with the vacuum collection subassembly, the vacuum collection subassembly is distinguished the intercommunication with the vacuum pump house, vacuum pump house district and filtration liquid collecting pit intercommunication.
Furthermore, a grab bucket crane is arranged at the top of the household garbage storage pit.
Furthermore, the bottom and the lateral wall of rubbish receiving pit all laid the permeable bed, the barrier layer has been laid to the bottom on permeable bed, the barrier layer of bottom is for putting the slope structure, the filtration liquid collecting pit is located rubbish receiving pit lateral wall bottom.
Furthermore, a submersible pump is arranged in the percolate collecting tank.
Furthermore, the elevation of the top of the percolate collecting tank is consistent with the elevation of the impermeable layer at the bottom.
Further, the broken dehydration district of rubbish include feeding bin, breaker and extrusion dewaterer, the import and the feeding bin of breaker are connected, the export and the extrusion dewaterer of breaker are connected, extrusion dewaterer's play liquid end, discharge end communicate with filtration liquid collecting pit, broken back rubbish storage pit respectively.
Further, broken back refuse storage hole's bottom and lateral wall be equipped with the permeable bed, the bottom on permeable bed has laid filtration liquid collection layer, is equipped with the drinking-water pipe in the filtration liquid collection layer, is equipped with the suction port on the drinking-water pipe, the vacuum pump intercommunication in drinking-water pipe and the vacuum pump room district, the vacuum pump communicates to filtration liquid collecting pit.
Furthermore, the percolate collecting layer is filled with ceramsite, the particle size of the ceramsite is 20-50 mm, and the ceramsite wraps up and supports the water pumping pipe.
Further, the drinking-water pipe including be responsible for and be responsible for the branch pipe of intercommunication, be responsible for along length direction evenly arranging, the branch pipe evenly arranges along width direction, the top of being responsible for is equipped with the suction mouth, the circumference of branch pipe is equipped with the suction mouth.
The leachate collection method for the domestic garbage storage pit comprises the following steps:
firstly, unloading household garbage into a garbage receiving pit, storing the household garbage in the garbage receiving pit for 0-3d, and obliquely converging percolate in the garbage into a percolate collecting pool through a slope releasing structure at the bottom; the process completes the primary collection of the landfill leachate;
secondly, conveying the garbage into a garbage crushing and dehydrating area, crushing the garbage until the particle size of the garbage is less than 300mm, then separating and dehydrating the garbage, and intensively collecting the percolate to enter a percolate collecting pool; the process completes the secondary collection of the landfill leachate;
step three, garbage enters the crushed garbage storage pit, the garbage is uniformly distributed in the bottom area of the crushed garbage storage pit, the crushed garbage is stored in the crushed garbage storage pit for 4-7d, a vacuum pump room area provides negative pressure, a vacuum collection assembly is utilized to carry out vacuum suction on the bottom of the crushed garbage storage pit, the bottom area of the whole storage pit is in a micro-negative pressure state, the particle size of the crushed garbage is reduced, the garbage is loose in a stacked state, a water outflow channel is opened, and a negative pressure suction effect is added, so that the seepage speed of the percolate can be greatly improved, the percolate in the garbage flows into a percolate collection layer at the bottom through a permeable layer under the action of the negative pressure, and the percolate is pumped into a percolate collection pool after being intensively sucked by the vacuum pump room area.
Furthermore, in the step I, the percolate in the garbage is filtered and seeped through the side wall and the permeable layer at the bottom and then enters the bottom area of the garbage receiving pit, the garbage percolate at the bottom is fully filtered and seeped into the impermeable layer at the bottom through the permeable layer, the impermeable layer at the bottom is integrally made into a slope placing structure, and the percolate is obliquely converged into the percolate collecting tank at one side of the garbage receiving pit.
Furthermore, in the step I, the landfill leachate is pumped out by a submersible pump arranged in a leachate collection pool and then enters a leachate disposal system, and the elevation of the top of the leachate collection pool is consistent with the elevation of the impermeable layer at the bottom.
Further, in the second step, the garbage is sent into a feeding bin in a garbage crushing and dewatering area, the garbage is crushed by a crusher until the particle size is smaller than 300mm, the garbage enters an extrusion dewaterer, the particle size of the crushed garbage is reduced, the garbage is loose in accumulation state, the percolate is easy to separate out, and the percolate enters a percolate collecting pool after the garbage is dewatered by the extrusion dewaterer.
Furthermore, in the third step, a vacuum pump in the vacuum pump room area is opened, the vacuum pump is connected with a water pumping pipe, and a percolate collecting layer at the bottom of the storage pit is pumped by utilizing pumping ports uniformly distributed on a pipeline of the water pumping pipe; after landfill leachate fully filtered through the permeable bed, a part of landfill leachate is directly taken away by the suction port at the top of the main pipe of the water pumping pipe and the branch pipe, and the other part of landfill leachate seeps into the leachate collecting layer, carries out omnibearing through the suction port arranged around the branch pipe, fully sucks without dead angles, and pumps leachate into the leachate collecting tank after the leachate is intensively sucked through the vacuum pump.
Furthermore, the percolate collecting layer is filled with ceramsite, the particle size is 20-50 mm, the ceramsite has good water absorption, can fully absorb the landfill percolate filtered by the upper permeable layer, and has the effects of accelerating the outflow and water storage of the percolate.
The invention has the beneficial effects that:
1. the method has the advantages of simple process, reasonable partition, economic and feasible scheme and suitability for industrial production.
2. By adopting the scheme of the invention, the water content of the household garbage can be reduced by 10-45% in the process of entering the storage stage.
3, the invention respectively utilizes the functions of gravity seepage, extrusion dehydration and vacuum suction to finish the three-stage collection of the domestic garbage percolate, thereby greatly reducing the subsequent treatment difficulty while improving the garbage heat value.
4. The invention changes the passive collection idea that the garbage percolate seeps out only by using the action of fermentation and gravity in the prior patent, and actively collects the percolate by adopting the modes of extrusion dehydration and vacuum suction, thereby greatly reducing the water content of the garbage.
5. According to the invention, the leachate is collected after the garbage is crushed, the particle size of the crushed garbage is reduced, the accumulation state is loose, a water outflow channel is opened, the leachate is more likely to be separated out, the solid-liquid separation efficiency of the garbage can be greatly improved, and the water content of the garbage is reduced.
6. The percolate collecting area completely covers the bottom and the side wall area of the garbage pit, the collecting area is large, the suction range is wide, and the water in the garbage can be analyzed.
7. The percolate collecting layer is filled with ceramsite with water absorption property, and has the effect of accelerating the outflow and water storage of percolate.
The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.
Drawings
Fig. 1 is a floor plan of the present invention.
Fig. 2 is a cross-sectional view of the structure of the present invention.
In the figure: 1-domestic waste storage pit, 2-waste receiving pit, 3-waste crushing and dewatering area, 4-crushed waste storage pit, 5-vacuum pump house area, 6-percolate collecting pool, 7-grab bucket crane, 8-permeable layer, 9-impermeable layer, 10-submersible pump, 11-feeding bin, 12-crusher, 13-extrusion dewaterer, 14-percolate collecting layer, 15-water pumping pipe, 16-suction opening and 17-vacuum pump.
Detailed Description
The following non-limiting examples serve to illustrate the invention.
Example 1:
referring to fig. 1 and 2, a household garbage storage pit 1 is provided with a grab bucket crane 7 at the top of the household garbage storage pit 1 for grabbing and transferring garbage and distributing the garbage.
Domestic waste storage pit 1 is including the rubbish receiving pit 2 that separates each other, rubbish broken dehydration district 3, broken back rubbish storage pit 4, vacuum pump house district 5 and filtration liquid collecting pit 6, the bottom of rubbish receiving pit 2 is equipped with puts the slope structure, filtration liquid collecting pit 6 is located the bottom of putting the slope structure, the play liquid end and the filtration liquid collecting pit 6 intercommunication of rubbish broken dehydration district 3, the discharge end and the broken back rubbish storage pit 4 intercommunication of rubbish broken dehydration district 3, the bottom of broken back rubbish storage pit 4 is equipped with the vacuum collection subassembly, the vacuum collection subassembly communicates with vacuum pump house district 5, vacuum pump house district 5 communicates with filtration liquid collecting pit 6.
Specifically, the bottom and the lateral wall of rubbish receiving pit 2 have all been laid permeable bed 8, and permeable bed 8 filters filtration liquid, and liquid can pass through permeable bed 8, and solid particle is detained, prevents that debris from blockking up. The barrier layer 9 has been laid to the bottom of permeable bed 8, and the barrier layer 9 of bottom is for putting the slope structure, and filtration liquid collecting pit 6 is located 2 lateral walls bottoms in the rubbish receiving pit to guarantee that 6 pond tops elevation of filtration liquid collecting pit is unanimous with the 9 elevation of bottom barrier layer, the filtration liquid of barrier layer 9 can flow in filtration liquid collecting pit 6 automatically under the action of gravity. The leachate collecting tank 6 is internally provided with a submersible pump 10, and the leachate is pumped out by the submersible pump 10 for centralized treatment.
The garbage crushing and dewatering area 3 comprises a feeding bin 11, a crusher 12 and an extrusion dewatering machine 13, an inlet of the crusher 12 is connected with the feeding bin 11, an outlet of the crusher 12 is connected with the extrusion dewatering machine 13, and a liquid outlet end and a material outlet end of the extrusion dewatering machine 13 are respectively communicated with a percolate collecting pool 6 and a crushed garbage storage pit 4. The grab bucket crane 7 grabs the garbage in the garbage receiving pit 2 to the feeding bin 11, the crusher 12 crushes the garbage, then the crushed garbage is treated by the extrusion dehydrator 13, the leachate flows into the leachate collecting tank 6, and the dehydrated garbage enters the crushed garbage storage pit 4. At least one set of garbage crushing and dewatering device comprising a feeding bin 11, a crusher 12 and an extruding and dewatering machine 13 is arranged in the garbage crushing and dewatering area 3.
The grab bucket crane 7 uniformly spreads the garbage at the bottom of the crushed garbage storage pit 4. The bottom and the lateral wall of broken back refuse storage hole 4 are equipped with permeable bed 8, and permeable bed 8 filters the filtration liquid. The bottom of permeable bed 8 has laid filtration liquid collection layer 14, and filtration liquid collection layer 14 is filled for the haydite, and the haydite particle diameter is 20 ~ 50mm, and the haydite parcel supports drinking-water pipe 15, and filtration liquid collection layer 14 then assembles the absorption to filtration liquid.
Be equipped with drinking-water pipe 15 in the filtration liquid collection layer 14, be equipped with suction port 16 on the drinking-water pipe 15, the vacuum pump 17 intercommunication in drinking-water pipe 15 and the vacuum pump room district 5, vacuum pump 17 intercommunication to filtration liquid collecting pit 6. Vacuum negative pressure is provided through a vacuum pump 17, and waste liquid in the percolate collecting layer 14 is subjected to vacuum adsorption through a water pumping pipe 15. The water pumping pipe 15 comprises a main pipe and branch pipes communicated with the main pipe, the main pipe is uniformly arranged at intervals of 5m in the length direction, the branch pipes are uniformly arranged at intervals of 0.5m in the width direction, a suction port 16 is formed in the top of the main pipe, and the branch pipes are circumferentially provided with the suction ports 16.
Example 2:
the leachate collection method for the domestic garbage storage pit comprises the following steps:
firstly, the household garbage is unloaded into a garbage receiving pit 2 through a transport vehicle, the household garbage is stored in the garbage receiving pit 2 for 0-3d, percolate in the garbage is filtered and seeped out through a side wall and a permeable layer 8 at the bottom and then enters a bottom area of the garbage receiving pit 2, the garbage percolate at the bottom is fully filtered and seeped into an impermeable layer 9 at the bottom through the permeable layer 8, the impermeable layer 9 at the bottom is integrally made into a slope placing structure, and the percolate is obliquely converged into a percolate collecting tank 6 at one side of the garbage receiving pit 2.
The landfill leachate is pumped out by a submersible pump 10 arranged in the leachate collecting tank 6 and then enters a leachate disposal system. The elevation of the top of the percolate collecting tank 6 is consistent with the elevation of the impermeable layer 9 at the bottom, so that the percolate can smoothly flow into the percolate collecting tank 6.
The process completes the primary collection of the landfill leachate; the water content in the garbage can be reduced by 2-10%.
Secondly, the garbage is sent into a feeding bin 11 in the garbage crushing and dewatering area 3 through a grab bucket crane 7 above, the garbage is crushed to a particle size smaller than 300mm by a crusher 12 and then enters an extruding and dewatering machine 13, the particle size of the crushed garbage is reduced, the garbage is loose in accumulation state, the percolate is more easily separated out, and the percolate is collected after the garbage is dewatered by the extruding and dewatering machine 13. At least one set of garbage crushing and dewatering device comprising a feeding bin 11, a crusher 12 and a squeezing dewatering machine 13 is arranged in the garbage crushing and dewatering area 3.
The process completes the secondary collection of the landfill leachate; the water content in the garbage can be reduced by 5-20%.
Step three, the garbage enters the crushed garbage storage pit 4, the garbage is uniformly spread at the bottom area of the crushed garbage storage pit 4 by using a grab crane 7, and the crushed garbage is stored in the crushed garbage storage pit 4 for 4-7 d.
When leachate is collected, the vacuum pump 17 of the vacuum pump room area 5 is opened, the vacuum pump 17 is connected with the water pumping pipe 15, and the leachate collection layer 14 at the bottom of the storage pit is pumped by utilizing the pumping ports 16 uniformly distributed on the pipeline of the water pumping pipe 15. Vacuum pump room district 5 provides the negative pressure, utilizes drinking-water pipe 15 to carry out vacuum suction to 4 bottoms in broken back rubbish storage hole, makes whole storage hole bottom region be in the state of little negative pressure, and rubbish diminishes through broken back particle diameter, and the pile-up state is loose, and the moisture outflow passageway is opened, and plus negative pressure suction effect can increase substantially the filtration liquid seepage speed, and filtration liquid is because during negative pressure effect flows into the filtration liquid collecting layer 14 of bottom through permeable bed 8 in the rubbish.
The permeable layer 8 can fully filter solid particles in the percolate and prevent sundries from being blocked. The percolate collecting layer 14 is filled with ceramsite, the particle size is 20-50 mm, the ceramsite has good water absorption, can fully absorb the landfill percolate filtered by the upper permeable layer, and has the effects of accelerating the outflow and water storage of the percolate.
After landfill leachate fully filters through permeable bed 8, partly is managed and the suction mouth 16 at the top of branch pipe is directly taken away by drinking-water pipe 15, and another part oozes into leachate collecting layer 14, carries out the all-round through the suction mouth 16 that the branch pipe was arranged all around, and the sufficient suction in no dead angle, leachate pump in leachate collecting tank 6 after vacuum pump 17 concentrated the suction.
The process completes the three-stage collection of the landfill leachate; the water content of the garbage can be reduced by 3-15%.
Example 3
The leachate collection method for the domestic garbage storage pit comprises the following steps:
in the step I, the garbage is stored in the garbage receiving pit 2 for 0.5d, and the water content in the garbage can be reduced by 2%. In the second step, the garbage is crushed to a particle size of 250mm by the crusher 12 and then enters the extrusion dehydrator 13, a set of garbage crushing and dehydrating device comprising the feeding bin 11, the crusher 12 and the extrusion dehydrator 13 is arranged in the garbage crushing and dehydrating area 3, and the water content in the garbage can be reduced by 10%. And step three, storing the crushed garbage in the crushed garbage storage pit 4 for 4d, wherein the water content in the garbage can be reduced by 7%.
The rest is the same as example 2.
Example 4
The leachate collection method for the domestic garbage storage pit comprises the following steps:
in the step I, the garbage is stored in the garbage receiving pit 2 for 3d, and the water content in the garbage can be reduced by 9%. In the second step, the garbage is crushed to a particle size of 200mm by the crusher 12 and then enters the extrusion dehydrator 13, and two sets of garbage crushing and dehydrating devices including the feeding bin 11, the crusher 12 and the extrusion dehydrator 13 are arranged in the garbage crushing and dehydrating area 3, so that the water content in the garbage can be reduced by 18%. And step three, storing the crushed garbage in the crushed garbage storage pit 4 for 7d, wherein the water content in the garbage can be reduced by 10%.
The rest is the same as example 2.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a domestic waste storage pit (1), its characterized in that: domestic waste store up hole (1) including the rubbish that separates each other and receive hole (2), rubbish broken dehydration district (3), broken back rubbish storage hole (4), vacuum pump house district (5) and filtration liquid collecting pit (6), the bottom of rubbish reception hole (2) is equipped with puts the slope structure, filtration liquid collecting pit (6) are located the bottom of putting the slope structure, the play liquid end and filtration liquid collecting pit (6) intercommunication of rubbish broken dehydration district (3), the discharge end and the broken back rubbish storage hole (4) intercommunication of rubbish broken dehydration district (3), the bottom of broken back rubbish storage hole (4) is equipped with the vacuum collection subassembly, the vacuum collection subassembly is distinguished (5) intercommunication with vacuum pump house, vacuum pump house district (5) and filtration liquid collecting pit (6) intercommunication.
2. The domestic waste storage pit of claim 1, wherein: the bottom and the lateral wall of rubbish receiving pit (2) all laid permeable bed (8), the bottom of permeable bed (8) has laid barrier layer (9), the barrier layer (9) of bottom is for putting the slope structure, filtration liquid collecting pit (6) are located rubbish receiving pit (2) lateral wall bottom.
3. The domestic waste storage pit of claim 1, characterized in that: the garbage crushing and dewatering area (3) comprises a feeding bin (11), a crusher (12) and an extrusion dewatering machine (13), an inlet of the crusher (12) is connected with the feeding bin (11), an outlet of the crusher (12) is connected with the extrusion dewatering machine (13), and a liquid outlet end and a discharge end of the extrusion dewatering machine (13) are respectively communicated with a percolate collecting tank (6) and a crushed garbage storage pit (4).
4. A domestic waste storage pit according to claim 1, 2 or 3, wherein: broken back refuse storage hole's (4) bottom and lateral wall be equipped with permeable bed (8), the bottom on permeable bed (8) has been laid and has been filtered liquid collection layer (14), is equipped with drinking-water pipe (15) in filtered liquid collection layer (14), is equipped with on drinking-water pipe (15) and sucks mouth (16), vacuum pump (17) intercommunication in drinking-water pipe (15) and the vacuum pump room district (5), vacuum pump (17) communicate to filtration liquid collecting pit (6).
5. The domestic waste storage pit of claim 4, wherein: the percolate collecting layer (14) is filled with ceramsite, the particle size of the ceramsite is 20-50 mm, and the ceramsite wraps the supporting water pumping pipe (15); the drinking-water pipe (15) including be responsible for and be responsible for the branch pipe of intercommunication, be responsible for along length direction evenly arranging, the branch pipe evenly arranges along width direction, the top of being responsible for is equipped with suction opening (16), the circumference of branch pipe is equipped with suction opening (16).
6. A leachate collection method using the domestic waste storage pit according to any of claims 1 to 5, comprising the steps of:
firstly, unloading household garbage into a garbage receiving pit (2), storing the household garbage in the garbage receiving pit (2) for 0-3d, and obliquely converging percolate in the garbage into a percolate collecting pool (6) through a slope placing structure at the bottom; the process completes the primary collection of the landfill leachate;
secondly, the garbage is sent into a garbage crushing and dehydrating area (3), the garbage is crushed until the particle size is less than 300mm, then separation and dehydration are carried out, and the percolate is collected in a centralized manner and enters a percolate collecting pool (6); the process completes the secondary collection of the landfill leachate;
step three, garbage enters the crushed garbage storage pit (4), the garbage is uniformly scattered in the bottom area of the crushed garbage storage pit (4), the crushed garbage is stored in the crushed garbage storage pit (4) for 4-7d, a vacuum pump room area (5) provides negative pressure, a vacuum collection assembly is utilized to carry out vacuum suction on the bottom of the crushed garbage storage pit (4), the bottom area of the whole storage pit is in a micro-negative pressure state, the crushed garbage is reduced in particle size and loose in accumulation state, a water outflow channel is opened, and the seepage speed of the percolate can be greatly improved due to the action of negative pressure, the percolate flows into a percolate collection layer (14) at the bottom through a permeable layer (8), and the percolate is pumped into a percolate collection pool (6) after being intensively sucked by the vacuum pump room area (5).
7. The leachate collection method of claim 6, wherein: in the first step, leachate in the garbage is filtered and seeped through the side wall and the permeable layer (8) at the bottom and then enters the bottom area of the garbage receiving pit (2), the garbage leachate at the bottom is fully filtered and seeped into the impermeable layer (9) at the bottom through the permeable layer (8), the impermeable layer (9) at the bottom is integrally made into a slope placing structure, and the leachate is obliquely converged into the leachate collecting tank (6) at one side of the garbage receiving pit (2).
8. The leachate collection method of claim 6, wherein: in the second step, the garbage is sent into a feeding bin (11) in a garbage crushing and dewatering area (3), the garbage is crushed by a crusher (12) until the particle size is smaller than 300mm and then enters an extrusion dewaterer (13), the particle size of the crushed garbage is reduced, the garbage is loose in accumulation state, percolate is more easily separated out, and the percolate enters a percolate collecting tank (6) after the garbage is dewatered by the extrusion dewaterer (13).
9. The leachate collection method of claim 6, 7 or 8, wherein: in the third step, a vacuum pump (17) of the vacuum pump room area (5) is opened, the vacuum pump (17) is connected with a water pumping pipe (15), and a percolate collecting layer (14) at the bottom of the storage pit is pumped by utilizing suction ports (16) uniformly distributed on a pipeline of the water pumping pipe (15); landfill leachate is through permeable bed (8) intensive filtration back, and partly is directly taken away by suction mouth (16) at the top that drinking-water pipe (15) are responsible for and the branch pipe, and another part oozes into leachate collecting layer (14), carries out the all-round through branch pipe suction mouth (16) of arranging all around, and no dead angle intensive suction, leachate pump after vacuum pump (17) intensive suction in leachate collecting pit (6).
10. The leachate collection method of claim 9, wherein: the percolate collecting layer (14) is filled with ceramsite, the particle size is 20-50 mm, the ceramsite has good water absorption, can fully absorb the landfill percolate filtered by the upper permeable layer, and has the effects of accelerating the outflow and water storage of the percolate.
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