CN114314979B - Leachate treatment system in refuse landfill and treatment process thereof - Google Patents
Leachate treatment system in refuse landfill and treatment process thereof Download PDFInfo
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Abstract
The invention discloses a leachate treatment system in a refuse landfill, which comprises a landfill pit, a discharge device and a treatment device, wherein the discharge device is positioned in the landfill pit; an impermeable layer is arranged in the landfill pit, and the landfill pit is communicated with a feeding pipe; the discharge device comprises a support plate and a collection pool, a plurality of water outlet holes are formed in the support plate, the landfill pit is communicated with the collection pool through the water outlet holes, and the support plate is connected with the anti-seepage layer; the supporting plate comprises a plurality of connecting sections and a plurality of supporting sections, the connecting sections and the supporting sections are arranged at intervals, and the connecting sections are connected with the anti-seepage layer; the percolate treatment system in the refuse landfill is convenient for stacking the refuse through the support plate, reduces the density of the stacked refuse, is further convenient for discharging the percolate, improves the discharge efficiency of the percolate, and simultaneously reduces the secondary pollution of the percolate to the soil.
Description
Technical Field
The invention relates to the technical field of garbage treatment, in particular to a percolate treatment system in a garbage landfill and a treatment process thereof.
Background
With the continuous improvement of living standard of people, the quantity of generated garbage is also continuously increased, the harm to the environment is also increased, in order to reduce the pollution of the garbage to the environment, a garbage landfill site is usually required to be established in a remote area, and then the garbage is transported to the garbage landfill site for unified treatment.
In the related art, when the landfill is treated, firstly, the garbage and the gas in the air need to react to decompose part of the garbage, then the remaining garbage is degraded by microorganisms to realize the degradation treatment of the garbage, and the garbage leachate is generated in the garbage decomposition process, and is usually discharged through a liquid outlet of the landfill and then treated.
Aiming at the related technologies, the inventor thinks that the self-quality of the garbage is increased along with the increase of the percolate in the stacking process of the garbage, so that the garbage is stacked more compactly, and the discharge of the percolate is hindered.
Disclosure of Invention
In order to facilitate the discharge of the landfill leachate, the invention provides a leachate treatment system in a landfill and a treatment process thereof.
In a first aspect, the invention provides a leachate treatment system in a landfill, which adopts the following technical scheme:
a leachate treatment system in a landfill site comprising a landfill pit, a drainage means and a treatment means, the drainage means being located in the landfill pit;
an impermeable layer is arranged in the landfill pit, and the landfill pit is communicated with a feeding pipe;
the discharge device comprises a support plate and a collection pool, a plurality of water outlet holes are formed in the support plate, the landfill pit is communicated with the collection pool through the water outlet holes, and the support plate is connected with the anti-seepage layer;
the supporting plate comprises a plurality of connecting sections and a plurality of supporting sections, the connecting sections and the supporting sections are arranged at intervals, each supporting section comprises a horizontal part and inclined parts positioned on two opposite sides of the horizontal part, the horizontal parts are positioned on the same plane, and the horizontal parts are positioned above the connecting sections; the distance between the two inclined parts on the same supporting section is gradually increased from one end close to the horizontal part to one end far away from the horizontal part, the two inclined parts are symmetrically arranged relative to the horizontal part, the adjacent horizontal part is connected with the connecting section through the inclined parts, and the connecting section is connected with the anti-seepage layer.
By adopting the technical scheme, when the garbage leachate is treated, firstly, the garbage is poured into the landfill pit through the feeding pipe, so that the garbage is positioned on the supporting plate, then the leachate is discharged into the collecting tank through the water outlet hole, and then the leachate in the collecting tank is treated through the treatment device; the filtration liquid processing system in the landfill yard of design, through the backup pad, the compaction degree that rubbish was stacked is reduced to the stacking of the rubbish of being convenient for, and then the discharge of the filtration liquid of being convenient for improves the discharge efficiency of filtration liquid, simultaneously, reduces the secondary pollution of filtration liquid to soil.
Optionally, the processing apparatus includes a separation assembly and an evaporation assembly, the separation assembly includes a settling tank and a filter tank, the settling tank is communicated with the collection tank through a pipeline, and the settling tank is communicated with the filter tank through a pipeline.
By adopting the technical scheme, when the percolate in the collecting tank is treated, firstly the percolate is discharged into the settling tank through the pipeline, enters the filter tank through the pipeline after being preliminarily settled by the settling tank, and is treated through the evaporation assembly; the setting of the settling tank is convenient for preliminary settling of the percolate, and preliminary separation of solid and liquid is realized; the setting of rose box is convenient for further filter the filtration liquid, improves solid-liquid separation's precision.
Optionally, be provided with flocculating agent, filter screen and accelerate in the settling tank stirring piece that the flocculating agent dissolved, the filter screen is located in the settling tank, just the flocculating agent is located the filter screen below.
By adopting the technical scheme, the flocculating agent is arranged, so that the aggregation of the particles in the settling tank is facilitated, the settling of the particles is further facilitated, and the solid-liquid separation is realized; the setting of stirring piece accelerates the dissolution of flocculating agent, and then improves solid-liquid separation's efficiency.
Optionally, the stirring piece includes motor and puddler, the motor is located on the setting tank, the output shaft of motor with puddler coaxial coupling, the puddler rotates with the setting tank and is connected.
By adopting the technical scheme, when the inside of the settling tank is stirred, the motor is started, and the motor drives the stirring rod to rotate, so that the stirring rod accelerates the dissolution of the flocculating agent; the setting of motor is convenient for provide drive power for the puddler, and then makes the puddler rotate, and the area of contact of increase flocculating agent and liquid is arranged to the puddler, and then improves the dissolution rate of flocculating agent.
Optionally, the evaporation subassembly includes evaporating chamber, heat-conducting plate, inlet tube and atomizer, the evaporating chamber is located directly over the landfill hole, just the heat-conducting plate will the evaporating chamber separates with the landfill hole, inlet tube one end with rose box top intercommunication, the other end stretches into the evaporating chamber with the atomizer intercommunication.
By adopting the technical scheme, when the separated liquid is evaporated, the liquid enters the atomizing spray head through the water inlet pipe to atomize the liquid, then the heat in the landfill pit enters the evaporation chamber through the heat conducting plate to heat the atomized liquid, and the evaporation of the liquid is realized; the setting of atomizer is convenient for atomize liquid, and then shortens the evaporation time of liquid, and the thermal transmission of being convenient for, and then be convenient for heat the liquid after the atomizing, improve the evaporation efficiency of liquid.
Optionally, the processing apparatus further comprises a gas assembly, the gas assembly comprises a gas tank, a drying tank and a plurality of gas guide tubes, the landfill pit is communicated with the bottom of the filter tank through the gas guide tubes, the top of the filter tank is communicated with the drying tank through the gas guide tubes, and the drying tank is communicated with the gas tank through the gas guide tubes.
By adopting the technical scheme, gas generated by decomposing the garbage is introduced into the filter box, so that soluble gas is mixed with liquid, and gas which is insoluble in water enters the drying box through the gas guide pipe and then enters the gas box to ignite combustible gas and release heat; the gas guide pipe is convenient for gas to be guided out, so that the gas is convenient to ignite in the gas box, the utilization of the gas is realized, and the resource utilization rate is improved.
Optionally, a heat pipe is arranged on the gas tank, one end of the heat pipe is communicated with the gas tank, and the other end of the heat pipe is communicated with the evaporation chamber.
Through adopting above-mentioned technical scheme, the heat of gas incasement is convenient for carry to the evaporating chamber in the setting of heat pipe, realizes thermal recycle.
Optionally, a condensation assembly is arranged in the evaporation chamber, the condensation assembly comprises a condensation plate and a guide plate, the guide plate is located on the side wall of the evaporation chamber, one end of the condensation plate is connected with the top wall of the evaporation chamber, the other end of the condensation plate is located in the guide plate, and the condensation plate is obliquely arranged from top to bottom from one end far away from the guide plate to one end close to the guide plate.
By adopting the technical scheme, after the evaporated liquid meets the condensing plate, the liquid is liquefied to form liquid, then the liquid flows into the guide plate along the condensing plate and is discharged out of the evaporation chamber along the guide plate for secondary utilization; the setting of condensation subassembly is convenient for carry out recycle, resources are saved to the pure water after the evaporation.
In a second aspect, a process for treating leachate in a landfill site comprises the steps of,
the method comprises the following steps of firstly, landfill, namely pouring the garbage into a landfill pit to enable the garbage to be located on a supporting plate, and then degrading to generate leachate;
secondly, discharging the percolate into a collecting tank through a water outlet hole to discharge the percolate,
and thirdly, treating the percolate, namely treating the percolate discharged from the collecting tank by a treatment device.
Through adopting above-mentioned technical scheme, when handling rubbish, at first pour rubbish into the landfill hole for rubbish is located the backup pad, then degrades, and the filtration liquid of production has been heard the apopore and has been got into in the collection pond, and rethread processing apparatus handles the filtration liquid of exhaust, and the discharge of the filtration liquid of being convenient for, and then reduces the secondary pollution of filtration liquid to soil.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the designed percolate treatment system in the refuse landfill facilitates the stacking of refuse through the support plate, reduces the compactness of the stacking of the refuse, further facilitates the discharge of percolate, improves the discharge efficiency of the percolate and simultaneously reduces the secondary pollution of the percolate to soil;
2. the flocculant is arranged, so that the aggregation of particles in the settling tank is facilitated, the settling of the particles is further facilitated, and solid-liquid separation is realized; the arrangement of the stirring piece accelerates the dissolution of the flocculating agent, thereby improving the solid-liquid separation efficiency;
3. the setting of atomizer is convenient for atomize liquid, and then shortens the evaporation time of liquid, and the thermal transmission of being convenient for, and then be convenient for heat the liquid after the atomizing, improve the evaporation efficiency of liquid.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is a cross-sectional view of an embodiment of the present invention.
Fig. 3 is a cross-sectional view of an embodiment of the present invention.
Description of reference numerals: 1. filling the pit; 11. a feeding pipe; 12. an impermeable layer; 2. a discharge device; 21. a support plate; 211. a connection section; 212. a support section; 213. a water outlet hole; 22. a collection tank; 3. a processing device; 31. a separation assembly; 311. a settling tank; 312. a filter box; 32. an evaporation assembly; 321. an evaporation chamber; 322. a heat conducting plate; 323. a water inlet pipe; 324. an atomizing spray head; 4. filtering with a screen; 5. a stirring member; 51. a motor; 52. a stirring rod; 6. a gas component; 61. a gas tank; 611. a heat conducting pipe; 62. a drying box; 63. an air duct; 7. a condensing assembly; 71. a condensing plate; 72. a baffle.
Detailed Description
The present invention is described in further detail below with reference to figures 1-3.
The embodiment of the invention discloses a leachate treatment system in a refuse landfill. Referring to fig. 1 and 2, the leachate treatment system in the landfill site comprises a landfill pit 1, a discharge device 2 and a treatment device 3, in the embodiment, the caliber of the landfill pit 1 is gradually reduced from one side of an opening to the bottom of the landfill pit 1, the discharge device 2 is positioned in the landfill pit 1, and the discharge device 2 is arranged, so that the discharge of leachate in the landfill pit 1 is facilitated, and the secondary pollution of the leachate to soil is reduced; the impermeable layer 12 is bonded in the landfill pit 1, so that the possibility of infiltration of leachate into soil in the garbage accumulation process is reduced, the landfill pit 1 is communicated with the feed pipe 11, the feed pipe 11 is arranged, the garbage can be poured conveniently, and the possibility of scattering of the garbage is reduced.
Referring to fig. 2, the discharging device 2 includes a supporting plate 21 and a collecting tank 22, the supporting plate 21 is bonded to the impermeable layer 12, a plurality of water outlets 213 are formed in the supporting plate 21, and the landfill pit 1 is communicated with the collecting tank 22 through the water outlets 213, so that the discharging of leachate is facilitated, the accumulation of leachate in the landfill pit 1 is reduced, and further the infiltration of the leachate into soil is reduced; the supporting plate 21 comprises a plurality of connecting sections 211 and a plurality of supporting sections 212, the connecting sections 211 and the supporting sections 212 are arranged at intervals, each supporting section 212 comprises a horizontal part and inclined parts positioned at two opposite sides of the horizontal part, the plurality of horizontal parts are positioned on the same plane, and the horizontal parts are positioned above the connecting sections 211; the distance between two slopes that lie in on same support section 212 is by being close to horizontal part one end to keeping away from horizontal part one end crescent, and two slopes set up about the horizontal part symmetry, adjacent horizontal part passes through the slope with linkage segment 211 and is connected, and linkage segment 211 and support section 212 body coupling, linkage segment 211 bonds with barrier layer 12, support section 212 and linkage segment 211's interval setting, reduce the compaction degree of rubbish, and then the outflow of the leachate of being convenient for, reduce the infiltration of leachate to soil.
Referring to fig. 1 and 2, processing apparatus 3 includes separating element 31 and evaporation plant 32, separating element 31 includes settling tank 311 and rose box 312, settling tank 311 passes through the pipeline and communicates with collecting pit 22, be convenient for collect the filtration liquid in the collecting pit 22 for liquid carries out preliminary solid-liquid separation in settling tank 311, settling tank 311 passes through pipeline and rose box 312 intercommunication, be convenient for carry out secondary solid-liquid to the liquid after preliminary filtration, make solid-liquid separation more thorough.
Referring to fig. 1 and fig. 3, a flocculant, a filter screen 4 and a stirring member 5 for accelerating the dissolution of the flocculant are arranged in the settling tank 311, the filter screen 4 is positioned in the settling tank 311, the flocculant is positioned below the filter screen 4, and the addition of the flocculant accelerates the coagulation of solid waste, thereby improving the solid-liquid separation efficiency; stirring member 5 includes motor 51 and puddler 52, and motor 51 passes through the bolt fastening on the setting tank 311, and motor 51's output shaft passes through the coupling joint with puddler 52, and motor 51's output shaft and the coaxial setting of puddler 52, and puddler 52 rotates with setting tank 311 to be connected, and the area of contact of flocculating agent and liquid is accelerateed in the setting of puddler 52, and then the dissolution of flocculating agent with higher speed, improves the dissolution efficiency of flocculating agent.
Referring to fig. 1 and 2, the evaporation assembly 32 includes an evaporation chamber 321, a heat conducting plate 322, a water inlet pipe 323, and an atomizing nozzle 324, the evaporation chamber 321 is located right above the landfill pit 1, the sidewall of the evaporation chamber 321 is bonded to the sidewall of the landfill pit 1, the evaporation chamber 321 is separated from the landfill pit 1 by the heat conducting plate 322, the heat conducting plate 322 is bonded to the sidewall of the evaporation chamber 321, one end of the water inlet pipe 323 is communicated with the top of the filter box 312, and the other end of the water inlet pipe extends into the evaporation chamber 321 to be communicated with the atomizing nozzle 324, the heat conducting plate 322 is disposed to facilitate the heat in the landfill pit 1 to enter the evaporation chamber 321, so as to accelerate the evaporation of the liquid, achieve solid-liquid separation, leave the solid in the heat conducting plate 322, and facilitate the subsequent uniform treatment.
Referring to fig. 1, the treatment device 3 further comprises a gas component 6, the gas component 6 comprises a gas tank 61, a drying tank 62 and a plurality of gas guide pipes 63, the landfill pit 1 is communicated with the bottom of the filter tank 312 through the gas guide pipes 63 so as to guide gas in the garbage decomposition process into the filter tank 312, the top of the filter tank 312 is communicated with the drying tank 62 through the gas guide pipes 63 so as to classify the gas, the gas insoluble in water is guided out and then dried, the drying tank 62 is communicated with the gas tank 61 through the gas guide pipes 63 so as to introduce combustible gas into the gas tank 61, the gas is ignited, waste gas utilization is realized, pollution is reduced on the one hand, and the resource utilization rate is improved on the other hand; the gas tank 61 is welded with the heat pipe 611, one end of the heat pipe 611 is communicated with the gas tank 61, the other end of the heat pipe 611 is communicated with the evaporation chamber 321, heat in the gas tank 61 can be conveniently conveyed to the evaporation chamber 321, and heat recycling is achieved.
Referring to fig. 2, be provided with condensation assembly 7 in the evaporating chamber 321, condensation assembly 7 includes condensation plate 71 and guide plate 72, the guide plate 72 welds on the lateral wall of evaporating chamber 321, condensation plate 71 one end and the welding of evaporating chamber 321 roof, the other end stretches into in the guide plate 72, and condensation plate 71 is by keeping away from guide plate 72 one end to being close to guide plate 72 one end by high to low slope setting, condensation plate 71's setting, be convenient for liquefy the moisture after the gasification, and simultaneously, be convenient for lead to water, make water flow in guide plate 72 along condensation plate 71, and discharge along guide plate 72, realize the recycle of water.
The implementation principle of the leachate treatment system in the refuse landfill provided by the embodiment of the invention is as follows: when the landfill leachate is treated, firstly, the landfill leachate is poured into the landfill pit 1 through the feeding pipe 11, so that the landfill leachate is located on the supporting plate 21, the leachate is discharged into the collecting tank 22 through the water outlet hole 213 in the garbage decomposition process, the leachate in the collecting tank 22 enters the settling tank 311 through a pipeline, then the motor 51 is started, the motor 51 drives the stirring rod 52 to rotate, so that the stirring rod 52 accelerates the dissolution of a flocculating agent, the leachate enters the filtering tank 312 through the pipeline after primary settling of the settling tank 311, the liquid filtered by the filtering tank 312 enters the atomizing nozzle 324 through the water inlet pipe 323, so that the liquid is atomized, then the heat in the landfill pit 1 enters the evaporation chamber 321 through the heat conducting plate 322, the atomized liquid is heated, the liquid is evaporated, and solid-liquid separation is realized; and then gas generated by decomposing the garbage is introduced into the filter box 312, so that the soluble gas is mixed with the liquid, the gas which is not dissolved in the water enters the drying box 62 through the gas guide pipe 63, then enters the fuel gas box 61, the combustible gas is ignited, the heat is released, the heat enters the evaporation chamber 321 through the heat conduction pipe 611, the liquid in the evaporation chamber 321 is heated, the evaporation of the liquid is accelerated, the evaporated liquid is liquefied into liquid after encountering the condensation plate 71, and then flows into the guide plate 72 along the condensation plate 71, and is discharged out of the evaporation chamber 321 along the guide plate 72 for secondary utilization.
In a second aspect, the treatment process of the leachate treatment system in the landfill comprises the following steps: comprises the following steps of (a) preparing a solution,
firstly, landfill of the garbage, namely pouring the garbage into a landfill pit 1 through a feeding pipe 11 to enable the garbage to be located on a supporting plate 21, and then degrading to generate leachate in the degradation process;
secondly, discharging the percolate, namely discharging the percolate into the collecting tank 22 through the water outlet hole 213 to discharge the percolate,
and thirdly, treating the leachate, namely discharging the collecting tank 22 into a settling tank 311, allowing the leachate to enter a filter tank 312 after primary settling, filtering the leachate by the filter tank 312, and allowing the leachate to enter an atomizing nozzle 324 through a water guide pipe, so that the liquid is gasified and then liquefied in an evaporation chamber 321, solid-liquid separation is realized, and the liquefied water is recycled.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The utility model provides a filtration liquid processing system in landfill which characterized in that: comprising a landfill pit (1), a discharge device (2) and a treatment device (3), the discharge device (2) being located in the landfill pit (1);
an impermeable layer (12) is arranged in the landfill pit (1), and the landfill pit (1) is communicated with a feeding pipe (11);
the discharge device (2) comprises a support plate (21) and a collection pool (22), a plurality of water outlet holes (213) are formed in the support plate (21), the landfill pit (1) is communicated with the collection pool (22) through the water outlet holes (213), and the support plate (21) is connected with the impermeable layer (12);
the supporting plate (21) comprises a plurality of connecting sections (211) and a plurality of supporting sections (212), the connecting sections (211) and the supporting sections (212) are arranged at intervals, each supporting section (212) comprises a horizontal part and inclined parts positioned at two opposite sides of the horizontal part, the horizontal parts are positioned on the same plane, and the horizontal parts are positioned above the connecting sections (211); the distance between the two inclined parts on the same support section (212) is gradually increased from one end close to the horizontal part to one end far away from the horizontal part, the two inclined parts are symmetrically arranged relative to the horizontal part, the adjacent horizontal part is connected with the connecting section (211) through the inclined parts, and the connecting section (211) is connected with the impermeable layer (12).
2. The leachate treatment system in a landfill according to claim 1, wherein: the treatment device (3) comprises a separation assembly (31) and an evaporation assembly (32), wherein the separation assembly (31) comprises a settling tank (311) and a filtering tank (312), the settling tank (311) is communicated with the collection tank (22) through a pipeline, and the settling tank (311) is communicated with the filtering tank (312) through a pipeline.
3. The leachate treatment system in a landfill according to claim 2, wherein: be provided with flocculating agent, filter screen (4) and accelerate in settling tank (311) stirring piece (5) that the flocculating agent dissolved, filter screen (4) are located in settling tank (311), just the flocculating agent is located filter screen (4) below.
4. The leachate treatment system in a landfill site of claim 3, wherein: stirring member (5) include motor (51) and puddler (52), motor (51) are located on settling tank (311), the output shaft of motor (51) with puddler (52) coaxial coupling, puddler (52) rotate with settling tank (311) and are connected.
5. The leachate treatment system in a landfill according to claim 2, wherein: evaporation subassembly (32) include evaporating chamber (321), heat-conducting plate (322), inlet tube (323) and atomizer (324), evaporating chamber (321) are located directly over landfill hole (1), just heat-conducting plate (322) will evaporating chamber (321) are separated with landfill hole (1), inlet tube (323) one end with rose box (312) top intercommunication, the other end stretches into evaporating chamber (321) with atomizer (324) intercommunication.
6. The leachate treatment system in a landfill according to claim 5, wherein: the treatment device (3) further comprises a gas component (6), the gas component (6) comprises a gas tank (61), a drying tank (62) and a plurality of gas guide pipes (63), the landfill pit (1) is communicated with the bottom of the filter tank (312) through the gas guide pipes (63), the top of the filter tank (312) is communicated with the drying tank (62) through the gas guide pipes (63), and the drying tank (62) is communicated with the gas tank (61) through the gas guide pipes (63).
7. The leachate treatment system in a landfill according to claim 6, wherein: the gas tank (61) is provided with a heat conduction pipe (611), one end of the heat conduction pipe (611) is communicated with the gas tank (61), and the other end of the heat conduction pipe (611) is communicated with the evaporation chamber (321).
8. The leachate treatment system in a landfill site of claim 5, wherein: be provided with condensation subassembly (7) in evaporating chamber (321), condensation subassembly (7) include condensing panel (71) and guide plate (72), guide plate (72) are located on the lateral wall of evaporating chamber (321), condensing panel (71) one end with evaporating chamber (321) roof is connected, and the other end is located in guide plate (72), just condensing panel (71) by keeping away from guide plate (72) one end is to being close to guide plate (72) one end is by high to low slope setting.
9. The process of any one of claims 1 to 8, wherein: comprises the following steps of (a) carrying out,
the method comprises the following steps of firstly, landfill, namely pouring the garbage into a landfill pit (1) to enable the garbage to be located on a supporting plate (21), and then degrading to generate leachate;
secondly, discharging the percolate, namely discharging the percolate into a collecting tank (22) through a water outlet hole (213) to discharge the percolate,
and thirdly, treating the percolate, namely treating the percolate discharged from the collecting tank (22) through a treatment device (3).
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| US5888022A (en) * | 1997-06-11 | 1999-03-30 | Environmental Control Systems, Inc. | Method and system for treating bio-degradable waste material through aerobic degradation |
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